Climate and average weather in Imperia
In Imperia, the summers are warm, showery, and mostly clear and the winters are cool, snowy, and mostly clear.
Over the course of the year, the temperature in Imperia typically varies from 4°C to 24°C, and is rarely below -1°C or above 27°C. August is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Imperia for warm-weather activities is from late May to early October.
- Hottest
- Aug
- 24°
- Coldest
- Jan
- 4°
- Wettest
- Nov
- 144 mm
- Driest
- Aug
- 52 mm
- Rain / yr
- 1009 mm
- 119 wet days
- Daylight
- 8.7–15.3 h
- shortest–longest
- Elevation
- 10 m
- 43.9°N
- Clearest
- Jul
- 43% cloud
Imperia weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late May to early October.
Temperature through the year
Daily average highs and lows in Imperia, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.3 months, from June 10 to September 18, with daily high temperatures above 20°C. The hottest month of the year in Imperia is August, with an average high of 24°C and low of 18°C.
The cool season lasts 3.7 months, from November 20 to March 13, with daily high temperatures below 11°C. The coldest month of the year in Imperia is January, with an average low of 4°C and high of 8°C.
Days typically run about 5°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 8 | 9 | 12 | 14 | 17 | 21 | 24 | 24 | 21 | 17 | 12 | 9 |
| Avg low (°C) | 4 | 4 | 6 | 9 | 12 | 16 | 18 | 18 | 15 | 12 | 8 | 4 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 8 | 4 |
| Feb | 9 | 4 |
| Mar | 12 | 6 |
| Apr | 14 | 9 |
| May | 17 | 12 |
| Jun | 21 | 16 |
| Jul | 24 | 18 |
| Aug | 24 | 18 |
| Sep | 21 | 15 |
| Oct | 17 | 12 |
| Nov | 12 | 8 |
| Dec | 9 | 4 |
Average hourly temperature in Imperia
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 24°C, and coldest before dawn in January, near 4°C.
Imperia weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 8° / 4° | 73 | 7.2 | 3.2 | 9.1 | 1.7 |
| Feb | 9° / 4° | 62 | 6.8 | 3.1 | 10.2 | 2.0 |
| Mar | 12° / 6° | 78 | 9 | 2.1 | 11.6 | 3.1 |
| Apr | 14° / 9° | 103 | 12.3 | 1 | 13.2 | 3.9 |
| May | 17° / 12° | 83 | 12.4 | 0 | 14.5 | 5.3 |
| Jun | 21° / 16° | 72 | 11.5 | 0 | 15.2 | 6.4 |
| Jul | 24° / 18° | 55 | 10.4 | 0 | 14.9 | 7.2 |
| Aug | 24° / 18° | 52 | 10.9 | 0 | 13.8 | 7.1 |
| Sep | 21° / 15° | 90 | 10.5 | 0 | 12.3 | 6.5 |
| Oct | 17° / 12° | 108 | 9.9 | 0.1 | 10.8 | 5.4 |
| Nov | 12° / 8° | 144 | 10 | 1.3 | 9.5 | 3.3 |
| Dec | 9° / 4° | 89 | 8.1 | 2.7 | 8.8 | 2.1 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Imperia gets about 1009 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.
The wetter season lasts 6.2 months, from around Mar 29 to Oct 4, peaking in May at about 44% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 4.
November is the wettest month by volume, with 144 mm over about 10 wet days; August is the driest, with 52 mm. Some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 23 | 25 | 29 | 40 | 41 | 38 | 34 | 35 | 35 | 32 | 33 | 27 |
| Rain days | 7 | 7 | 9 | 12 | 12 | 12 | 10 | 11 | 11 | 10 | 10 | 8 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 23 | 7 |
| Feb | 25 | 7 |
| Mar | 29 | 9 |
| Apr | 40 | 12 |
| May | 41 | 12 |
| Jun | 38 | 12 |
| Jul | 34 | 10 |
| Aug | 35 | 11 |
| Sep | 35 | 11 |
| Oct | 32 | 10 |
| Nov | 33 | 10 |
| Dec | 27 | 8 |
Monthly rainfall
Over a full year, Imperia collects about 1009 mm of rain across 119 wet days — roughly 84 mm in an average month.
It doesn’t fall evenly. November is the wettest month with 144 mm, while August is the driest at just 52 mm. The three wettest months alone bring about 35% of the year’s total, and some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 73 | 62 | 78 | 103 | 83 | 72 | 55 | 52 | 90 | 108 | 144 | 89 |
| Rain days | 7 | 7 | 9 | 12 | 12 | 12 | 10 | 11 | 11 | 10 | 10 | 8 |
| Snow days | 3 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| Rainfall (mm) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 73 | 7 | 3 |
| Feb | 62 | 7 | 3 |
| Mar | 78 | 9 | 2 |
| Apr | 103 | 12 | 1 |
| May | 83 | 12 | 0 |
| Jun | 72 | 12 | 0 |
| Jul | 55 | 10 | 0 |
| Aug | 52 | 11 | 0 |
| Sep | 90 | 11 | 0 |
| Oct | 108 | 10 | 0 |
| Nov | 144 | 10 | 1 |
| Dec | 89 | 8 | 3 |
Snow in Imperia
Average snowy days through the year, the snow-season span, and estimated snowfall — for ski trips and the perennial 'will there be snow at Christmas?' question.
Imperia averages about 14 snowy days a year. Snow season runs roughly Nov 3 to Apr 25 — about 5.7 months.
February is snowiest, with roughly 3 days of snow and an estimated 15 cm of snowfall. Over the year that adds up to an estimated 61 cm of snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow days | 3 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| Snowfall (cm) | 14 | 15 | 9 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 16 |
| Snow days | Snowfall (cm) | |
|---|---|---|
| Jan | 3 | 14 |
| Feb | 3 | 15 |
| Mar | 2 | 9 |
| Apr | 1 | 3 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 0 | 1 |
| Nov | 1 | 4 |
| Dec | 3 | 16 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Imperia, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around June 14 and lasts for 3.4 months, ending around September 25. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 73% of the time on average.
The cloudier part of the year begins around March 19 and lasts for 2.9 months, ending around June 13. The cloudiest month is May, when it is overcast or mostly cloudy 53% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 58 | 59 | 56 | 49 | 47 | 59 | 73 | 72 | 62 | 50 | 51 | 55 |
| Cloudier (%) | 42 | 41 | 44 | 51 | 53 | 41 | 27 | 28 | 38 | 50 | 49 | 45 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 58 | 42 |
| Feb | 59 | 41 |
| Mar | 56 | 44 |
| Apr | 49 | 51 |
| May | 47 | 53 |
| Jun | 59 | 41 |
| Jul | 73 | 27 |
| Aug | 72 | 28 |
| Sep | 62 | 38 |
| Oct | 50 | 50 |
| Nov | 51 | 49 |
| Dec | 55 | 45 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 15, brings about 15 h 18 min of light; the shortest, around December 15, only 8 h 42 min — a swing of roughly 6 h 36 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.1 | 10.2 | 11.6 | 13.2 | 14.5 | 15.2 | 14.9 | 13.8 | 12.3 | 10.8 | 9.5 | 8.8 |
| Sunrise (AM) | 8:05 | 7:37 | 6:49 | 5:52 | 5:08 | 4:50 | 5:04 | 5:37 | 6:13 | 6:50 | 7:31 | 8:02 |
| Sunset (PM) | 5:09 | 5:48 | 6:26 | 7:04 | 7:40 | 8:06 | 8:03 | 7:27 | 6:31 | 5:36 | 4:55 | 4:46 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.1 | 8:05 | 5:09 |
| Feb | 10.2 | 7:37 | 5:48 |
| Mar | 11.6 | 6:49 | 6:26 |
| Apr | 13.2 | 5:52 | 7:04 |
| May | 14.5 | 5:08 | 7:40 |
| Jun | 15.2 | 4:50 | 8:06 |
| Jul | 14.9 | 5:04 | 8:03 |
| Aug | 13.8 | 5:37 | 7:27 |
| Sep | 12.3 | 6:13 | 6:31 |
| Oct | 10.8 | 6:50 | 5:36 |
| Nov | 9.5 | 7:31 | 4:55 |
| Dec | 8.8 | 8:02 | 4:46 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Imperia averages about 12 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 7 and 15 days.
The sunnier stretch runs 3.0 months, from around Jun 21 to Sep 20. The sunniest month is July, with roughly 14 sunny days (mixed).
The greyest month is May, down near 9 sunny days — about 39% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 13 | 12 | 13 | 10 | 9 | 11 | 14 | 14 | 12 | 11 | 11 | 13 |
| Sky | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 13 | Mixed |
| Feb | 12 | Mixed |
| Mar | 13 | Mixed |
| Apr | 10 | Mixed |
| May | 9 | Mixed |
| Jun | 11 | Mixed |
| Jul | 14 | Mixed |
| Aug | 14 | Mixed |
| Sep | 12 | Mixed |
| Oct | 11 | Mixed |
| Nov | 11 | Mixed |
| Dec | 13 | Mixed |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Imperia, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 3.6 months, from around June 4 to September 20. The muggiest month is August, when the air feels humid, muggy or worse about 75% of the time.
The most comfortable stretch runs from around September 21 to June 3, and April is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 99 | 74 | 21 | 8 | 7 | 39 | 78 | 99 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 1 | 22 | 36 | 16 | 17 | 33 | 18 | 1 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 3 | 32 | 41 | 40 | 23 | 3 | 0 | 0 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 10 | 33 | 33 | 4 | 0 | 0 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| Jan | 100 | 0 | 0 | 0 | 0 |
| Feb | 100 | 0 | 0 | 0 | 0 |
| Mar | 100 | 0 | 0 | 0 | 0 |
| Apr | 99 | 1 | 0 | 0 | 0 |
| May | 74 | 22 | 3 | 0 | 0 |
| Jun | 21 | 36 | 32 | 10 | 1 |
| Jul | 8 | 16 | 41 | 33 | 3 |
| Aug | 7 | 17 | 40 | 33 | 2 |
| Sep | 39 | 33 | 23 | 4 | 0 |
| Oct | 78 | 18 | 3 | 0 | 0 |
| Nov | 99 | 1 | 0 | 0 | 0 |
| Dec | 100 | 0 | 0 | 0 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Imperia is typically calm, near 9 km/h, and varies little with the seasons.
The windier part of the year lasts 6.9 months, from around Sep 30 to Apr 27. The windiest month is January, averaging about 10 km/h (calm).
The calmer part of the year runs from around Apr 28 to Sep 29, with July the calmest month at about 7 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 10 | 10 | 9 | 8 | 7 | 7 | 7 | 8 | 10 | 10 | 10 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 10 | calm |
| Feb | 10 | calm |
| Mar | 10 | calm |
| Apr | 9 | calm |
| May | 8 | calm |
| Jun | 7 | calm |
| Jul | 7 | calm |
| Aug | 7 | calm |
| Sep | 8 | calm |
| Oct | 10 | calm |
| Nov | 10 | calm |
| Dec | 10 | calm |
Best time to visit Imperia
To characterize how pleasant the weather is in Imperia throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late September, Imperia is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Imperia for general outdoor tourist activities is from late May to early October, with a peak score in the last week of July.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 1.7 | 2.0 | 3.1 | 3.9 | 5.3 | 6.4 | 7.2 | 7.1 | 6.5 | 5.4 | 3.4 | 2.1 |
| Rating | poor | poor | poor | fair | fair | good | good | good | good | fair | poor | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 1.7 | poor |
| Feb | 2.0 | poor |
| Mar | 3.1 | poor |
| Apr | 3.9 | fair |
| May | 5.3 | fair |
| Jun | 6.4 | good |
| Jul | 7.2 | good |
| Aug | 7.1 | good |
| Sep | 6.5 | good |
| Oct | 5.4 | fair |
| Nov | 3.4 | poor |
| Dec | 2.1 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Imperia for hot-weather activities is from late June to late August, with a peak score in the last week of July.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Imperia, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around August (highs near 24°C), the essentials are light clothes, rain gear and sun protection. In the cold season around January (highs near 8°C), pack a warm layer.
In August, Imperia sees daytime highs around 24°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.
Sea temperature near Imperia
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea offshore is warmest in August at about 25°C and coldest in February near 13°C.
It's comfortable for a long swim from Jun 7 to Oct 12 — about 4.2 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 14 | 13 | 14 | 15 | 18 | 21 | 24 | 25 | 22 | 20 | 17 | 15 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Warm | Refreshing | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 14 | Bracing |
| Feb | 13 | Bracing |
| Mar | 14 | Bracing |
| Apr | 15 | Bracing |
| May | 18 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Refreshing |
| Aug | 25 | Warm |
| Sep | 22 | Refreshing |
| Oct | 20 | Cool |
| Nov | 17 | Cool |
| Dec | 15 | Cool |
UV index (midday) in Imperia by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Imperia peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 3 | 5 | 7 | 7 | 8 | 9 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | Very high | High | Very high | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | Very high |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | High |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Average hourly UV index in Imperia
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 0 | 0 | 4.5 | 7 | 7 | 8 | 8.5 | 7 | 5 | 2.5 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 3.5 | 3 | 4.5 | 5 | 3 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 4.5 | 0 |
| Apr | 7 | 3.5 |
| May | 7 | 3 |
| Jun | 8 | 4.5 |
| Jul | 8.5 | 5 |
| Aug | 7 | 3 |
| Sep | 5 | 0 |
| Oct | 2.5 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Air quality in Imperia by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.
Air quality in Imperia is worst in March — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 16 | 19 | 18 | 15 | 15 | 13 | 14 | 13 | 14 | 13 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 16 | Moderate |
| Mar | 19 | Moderate |
| Apr | 18 | Moderate |
| May | 15 | Moderate |
| Jun | 15 | Moderate |
| Jul | 13 | Moderate |
| Aug | 14 | Moderate |
| Sep | 13 | Moderate |
| Oct | 14 | Moderate |
| Nov | 13 | Moderate |
| Dec | 14 | Moderate |
Growing season
Imperia is mild enough that a frost-free day stays more likely than not even in midwinter. Nights are reliably above freezing from about February 19 to January 31 (347 days); outside that window a hard frost is an occasional risk.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 94 | 90 | 98 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 96 |
| Frost nights | 1 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 94 | 1 |
| Feb | 90 | 23 |
| Mar | 98 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 99 | 0 |
| Dec | 96 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Imperia banks about 1,505 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 0 | 0 | 0 | 36 | 151 | 253 | 337 | 343 | 238 | 130 | 17 | 0 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 36 |
| May | 151 |
| Jun | 253 |
| Jul | 337 |
| Aug | 343 |
| Sep | 238 |
| Oct | 130 |
| Nov | 17 |
| Dec | 0 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Imperia receives about 4.1 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.5 and 6.8 kWh/m².
The brighter stretch of the year lasts 6.2 months, from around Mar 17 to Sep 20. The brightest month is June, averaging about 6.6 kWh/m² (intense).
The dimmest month is December, down near 1.5 kWh/m² — roughly 77% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 1.8 | 2.7 | 4.1 | 5.2 | 6.1 | 6.6 | 6.7 | 5.8 | 4.4 | 2.9 | 1.9 | 1.5 |
| Level | Dim | Moderate | Bright | Bright | Intense | Intense | Intense | Bright | Bright | Moderate | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 1.8 | Dim |
| Feb | 2.7 | Moderate |
| Mar | 4.1 | Bright |
| Apr | 5.2 | Bright |
| May | 6.1 | Intense |
| Jun | 6.6 | Intense |
| Jul | 6.7 | Intense |
| Aug | 5.8 | Bright |
| Sep | 4.4 | Bright |
| Oct | 2.9 | Moderate |
| Nov | 1.9 | Dim |
| Dec | 1.5 | Dim |
Where is Imperia?
Imperia sits at 43.9°N, 8.0°E, 10 m above sea level, in Italy. The nearest listed city is Sanremo, 22 km away.
Topography around Imperia
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Imperia.
Within 3 km, the terrain around Imperia has significant variations in elevation — a maximum elevation change of 351 m around an average of 72 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,165 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,195 m.
The land around Imperia is covered by trees (40%) and water (38%) within 3 km, water (52%) and trees (39%) within 16 km, and trees (45%) and water (38%) within 80 km.
Italy travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / L
- 230 V · 50 Hz
- Prices
- ≈ 69% of US
- price level, 2025
- GDP per capita
- $43,309
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 5.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 513
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Imperia (43.8892°, 8.0393°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).