Climate and average weather in Civitavecchia
In Civitavecchia, the summers are humid, warm, dry, and clear and the winters are cool, breezy, and mostly clear.
Over the course of the year, the temperature in Civitavecchia typically varies from 9°C to 25°C, and is rarely below 5°C or above 28°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 Civitavecchia for warm-weather activities is from late May to mid September.
- Hottest
- Aug
- 25°
- Coldest
- Jan
- 10°
- Wettest
- Nov
- 153 mm
- Driest
- Jul
- 12 mm
- Rain / yr
- 797 mm
- 90 wet days
- Daylight
- 8.9–15.1 h
- shortest–longest
- Elevation
- 10 m
- 42.1°N
- Clearest
- Jul
- 16% cloud
- Air quality
- Good
- PM2.5 8.7 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Civitavecchia 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 mid September.
Temperature through the year
Daily average highs and lows in Civitavecchia, 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 16 to September 22, with daily high temperatures above 22°C. The hottest month of the year in Civitavecchia is August, with an average high of 25°C and low of 23°C.
The cool season lasts 4.3 months, from November 30 to April 9, with daily high temperatures below 15°C. The coldest month of the year in Civitavecchia is January, with an average low of 10°C and high of 12°C.
Days typically run about 2°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 12 | 13 | 15 | 19 | 22 | 25 | 25 | 23 | 20 | 16 | 13 |
| Avg low (°C) | 10 | 9 | 11 | 13 | 16 | 20 | 23 | 23 | 21 | 17 | 14 | 11 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 12 | 10 |
| Feb | 12 | 9 |
| Mar | 13 | 11 |
| Apr | 15 | 13 |
| May | 19 | 16 |
| Jun | 22 | 20 |
| Jul | 25 | 23 |
| Aug | 25 | 23 |
| Sep | 23 | 21 |
| Oct | 20 | 17 |
| Nov | 16 | 14 |
| Dec | 13 | 11 |
Average hourly temperature in Civitavecchia
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 25°C, and coldest before dawn in January, near 10°C.
Civitavecchia weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 12° / 10° | 75 | 9.9 | 9.3 | 3.4 |
| Feb | 12° / 9° | 71 | 9.1 | 10.3 | 3.4 |
| Mar | 13° / 11° | 62 | 7.6 | 11.7 | 4.2 |
| Apr | 15° / 13° | 56 | 7.9 | 13.1 | 5.1 |
| May | 19° / 16° | 33 | 5.7 | 14.4 | 6.9 |
| Jun | 22° / 20° | 21 | 3.2 | 15 | 8.4 |
| Jul | 25° / 23° | 12 | 1.4 | 14.8 | 9.2 |
| Aug | 25° / 23° | 19 | 2.3 | 13.7 | 8.8 |
| Sep | 23° / 21° | 77 | 7.3 | 12.3 | 7.6 |
| Oct | 20° / 17° | 117 | 10.3 | 10.8 | 6.5 |
| Nov | 16° / 14° | 153 | 12.7 | 9.6 | 4.9 |
| Dec | 13° / 11° | 101 | 12.1 | 9 | 3.8 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Civitavecchia gets about 797 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 5.9 months, from around Sep 12 to Mar 10, peaking in November at about 43% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 3.
November is the wettest month by volume, with 153 mm over about 13 wet days; July is the driest, with 12 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 33 | 33 | 24 | 26 | 19 | 10 | 4 | 8 | 25 | 33 | 42 | 39 |
| Rain days | 10 | 9 | 8 | 8 | 6 | 3 | 1 | 2 | 7 | 10 | 13 | 12 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 33 | 10 |
| Feb | 33 | 9 |
| Mar | 24 | 8 |
| Apr | 26 | 8 |
| May | 19 | 6 |
| Jun | 10 | 3 |
| Jul | 4 | 1 |
| Aug | 8 | 2 |
| Sep | 25 | 7 |
| Oct | 33 | 10 |
| Nov | 42 | 13 |
| Dec | 39 | 12 |
Monthly rainfall
Over a full year, Civitavecchia collects about 797 mm of rain across 90 wet days — roughly 66 mm in an average month.
It doesn’t fall evenly. November is the wettest month with 153 mm, while July is the driest at just 12 mm. The three wettest months alone bring about 46% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 75 | 71 | 62 | 56 | 33 | 21 | 12 | 19 | 77 | 117 | 153 | 101 |
| Rain days | 10 | 9 | 8 | 8 | 6 | 3 | 1 | 2 | 7 | 10 | 13 | 12 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 75 | 10 |
| Feb | 71 | 9 |
| Mar | 62 | 8 |
| Apr | 56 | 8 |
| May | 33 | 6 |
| Jun | 21 | 3 |
| Jul | 12 | 1 |
| Aug | 19 | 2 |
| Sep | 77 | 7 |
| Oct | 117 | 10 |
| Nov | 153 | 13 |
| Dec | 101 | 12 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Civitavecchia, 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 May 17 and lasts for 4.6 months, ending around October 2. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 93% of the time on average.
The cloudier part of the year begins around October 3 and lasts for 7.4 months, ending around May 16. The cloudiest month is November, when it is overcast or mostly cloudy 43% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 58 | 63 | 65 | 65 | 70 | 84 | 93 | 90 | 76 | 67 | 57 | 58 |
| Cloudier (%) | 42 | 37 | 35 | 35 | 30 | 16 | 7 | 10 | 24 | 33 | 43 | 42 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 58 | 42 |
| Feb | 63 | 37 |
| Mar | 65 | 35 |
| Apr | 65 | 35 |
| May | 70 | 30 |
| Jun | 84 | 16 |
| Jul | 93 | 7 |
| Aug | 90 | 10 |
| Sep | 76 | 24 |
| Oct | 67 | 33 |
| Nov | 57 | 43 |
| Dec | 58 | 42 |
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 16, brings about 15 h 06 min of light; the shortest, around December 16, only 8 h 54 min — a swing of roughly 6 h 12 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.3 | 10.3 | 11.7 | 13.1 | 14.4 | 15.0 | 14.8 | 13.7 | 12.3 | 10.8 | 9.6 | 9.0 |
| Sunrise (AM) | 7:45 | 7:18 | 6:33 | 5:39 | 4:58 | 4:42 | 4:55 | 5:25 | 5:59 | 6:33 | 7:11 | 7:41 |
| Sunset (PM) | 5:00 | 5:37 | 6:12 | 6:47 | 7:20 | 7:45 | 7:42 | 7:08 | 6:16 | 5:23 | 4:45 | 4:37 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.3 | 7:45 | 5:00 |
| Feb | 10.3 | 7:18 | 5:37 |
| Mar | 11.7 | 6:33 | 6:12 |
| Apr | 13.1 | 5:39 | 6:47 |
| May | 14.4 | 4:58 | 7:20 |
| Jun | 15.0 | 4:42 | 7:45 |
| Jul | 14.8 | 4:55 | 7:42 |
| Aug | 13.7 | 5:25 | 7:08 |
| Sep | 12.3 | 5:59 | 6:16 |
| Oct | 10.8 | 6:33 | 5:23 |
| Nov | 9.6 | 7:11 | 4:45 |
| Dec | 9.0 | 7:41 | 4:37 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Civitavecchia averages about 17 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 11 and 27 days.
The sunnier stretch runs 4.3 months, from around May 18 to Sep 24. The sunniest month is July, with roughly 26 sunny days (brilliant).
The greyest month is November, down near 11 sunny days — about 57% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 13 | 13 | 15 | 15 | 17 | 21 | 27 | 25 | 19 | 15 | 11 | 13 |
| Sky | Mixed | Mixed | Bright | Bright | Bright | Bright | Brilliant | Brilliant | Bright | Bright | Mixed | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 13 | Mixed |
| Feb | 13 | Mixed |
| Mar | 15 | Bright |
| Apr | 15 | Bright |
| May | 17 | Bright |
| Jun | 21 | Bright |
| Jul | 27 | Brilliant |
| Aug | 25 | Brilliant |
| Sep | 19 | Bright |
| Oct | 15 | Bright |
| 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 Civitavecchia, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 5.1 months, from around May 21 to October 22. The muggiest month is August, when the air feels humid, muggy or worse about 96% of the time.
The most comfortable stretch runs from around October 23 to May 20, and January 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 | 99 | 81 | 28 | 4 | 0 | 1 | 9 | 26 | 67 | 96 |
| Comfortable (%) | 0 | 0 | 1 | 19 | 44 | 16 | 5 | 3 | 18 | 32 | 26 | 4 |
| Humid (%) | 0 | 0 | 0 | 0 | 25 | 39 | 18 | 15 | 32 | 32 | 7 | 0 |
| Muggy (%) | 0 | 0 | 0 | 0 | 3 | 33 | 40 | 35 | 34 | 9 | 0 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 8 | 34 | 43 | 8 | 0 | 0 | 0 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 100 | 0 | 0 | 0 | 0 | 0 |
| Feb | 100 | 0 | 0 | 0 | 0 | 0 |
| Mar | 99 | 1 | 0 | 0 | 0 | 0 |
| Apr | 81 | 19 | 0 | 0 | 0 | 0 |
| May | 28 | 44 | 25 | 3 | 0 | 0 |
| Jun | 4 | 16 | 39 | 33 | 8 | 0 |
| Jul | 0 | 5 | 18 | 40 | 34 | 2 |
| Aug | 1 | 3 | 15 | 35 | 43 | 3 |
| Sep | 9 | 18 | 32 | 34 | 8 | 0 |
| Oct | 26 | 32 | 32 | 9 | 0 | 0 |
| Nov | 67 | 26 | 7 | 0 | 0 | 0 |
| Dec | 96 | 4 | 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 Civitavecchia is typically light breeze, near 17 km/h, and varies moderately with the seasons.
The windier part of the year lasts 6.0 months, from around Oct 15 to Apr 14. The windiest month is December, averaging about 21 km/h (breezy).
The calmer part of the year runs from around Apr 15 to Oct 14, with August the calmest month at about 14 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 20 | 20 | 19 | 17 | 15 | 14 | 14 | 14 | 16 | 18 | 21 | 21 |
| Feels | breezy | breezy | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 20 | breezy |
| Feb | 20 | breezy |
| Mar | 19 | light breeze |
| Apr | 17 | light breeze |
| May | 15 | light breeze |
| Jun | 14 | light breeze |
| Jul | 14 | light breeze |
| Aug | 14 | light breeze |
| Sep | 16 | light breeze |
| Oct | 18 | light breeze |
| Nov | 21 | breezy |
| Dec | 21 | breezy |
Hazard calendar for Civitavecchia
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Civitavecchia's rainy season runs September–February, when most of the year's rain falls.
Best time to visit Civitavecchia
To characterize how pleasant the weather is in Civitavecchia throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early September, Civitavecchia 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 Civitavecchia for general outdoor tourist activities is from late May to mid September, with a peak score in the first 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) | 3.4 | 3.4 | 4.2 | 5.1 | 6.9 | 8.4 | 9.2 | 8.8 | 7.6 | 6.5 | 4.9 | 3.8 |
| Rating | poor | poor | fair | fair | good | ideal | ideal | ideal | ideal | good | fair | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 3.4 | poor |
| Feb | 3.4 | poor |
| Mar | 4.2 | fair |
| Apr | 5.1 | fair |
| May | 6.9 | good |
| Jun | 8.4 | ideal |
| Jul | 9.2 | ideal |
| Aug | 8.8 | ideal |
| Sep | 7.6 | ideal |
| Oct | 6.5 | good |
| Nov | 4.9 | fair |
| Dec | 3.8 | fair |
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 Civitavecchia for hot-weather activities is from late June to early September, with a peak score in the first week of August.
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 Civitavecchia, 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 25°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 12°C), pack a warm layer, rain gear and a windbreaker.
In August, Civitavecchia sees daytime highs around 25°C and nights near 23°C. Pack sun protection. Worth having: light clothes.
Sea temperature near Civitavecchia
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 15 km away) is warmest in August at about 25°C and coldest in February near 14°C.
It's comfortable for a long swim from Jun 2 to Oct 29 — about 4.9 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 14 | 14 | 15 | 18 | 22 | 24 | 25 | 23 | 21 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Warm | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 14 | Bracing |
| Mar | 14 | Bracing |
| Apr | 15 | Cool |
| May | 18 | Cool |
| Jun | 22 | Refreshing |
| Jul | 24 | Warm |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index (midday) in Civitavecchia 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 Civitavecchia peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 | 4 | 7 | 8 | 9 | 8 | 5 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 4 | Moderate |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 5 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Average hourly UV index in Civitavecchia
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 5.5 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 | 4.5 | 7 | 8.5 | 8.5 | 7.5 | 5.5 | 3 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 2.5 | 5 | 5.5 | 4 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 4.5 | 0 |
| Apr | 4.5 | 0 |
| May | 7 | 2.5 |
| Jun | 8.5 | 5 |
| Jul | 8.5 | 5.5 |
| Aug | 7.5 | 4 |
| Sep | 5.5 | 0 |
| Oct | 3 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Growing season
Civitavecchia is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 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. Civitavecchia banks about 2,486 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) | 26 | 19 | 61 | 119 | 229 | 332 | 424 | 442 | 350 | 267 | 152 | 64 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 26 |
| Feb | 19 |
| Mar | 61 |
| Apr | 119 |
| May | 229 |
| Jun | 332 |
| Jul | 424 |
| Aug | 442 |
| Sep | 350 |
| Oct | 267 |
| Nov | 152 |
| Dec | 64 |
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.
Civitavecchia receives about 4.5 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.7 and 7.3 kWh/m².
The brighter stretch of the year lasts 6.0 months, from around Mar 20 to Sep 19. The brightest month is June, averaging about 7.2 kWh/m² (intense).
The dimmest month is December, down near 1.7 kWh/m² — roughly 76% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 1.9 | 3.0 | 4.3 | 5.6 | 6.6 | 7.2 | 7.2 | 6.3 | 4.7 | 3.2 | 2.1 | 1.7 |
| Level | Dim | Moderate | Bright | Bright | Intense | Intense | Intense | Intense | Bright | Moderate | Moderate | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 1.9 | Dim |
| Feb | 3.0 | Moderate |
| Mar | 4.3 | Bright |
| Apr | 5.6 | Bright |
| May | 6.6 | Intense |
| Jun | 7.2 | Intense |
| Jul | 7.2 | Intense |
| Aug | 6.3 | Intense |
| Sep | 4.7 | Bright |
| Oct | 3.2 | Moderate |
| Nov | 2.1 | Moderate |
| Dec | 1.7 | Dim |
Where is Civitavecchia?
Civitavecchia sits at 42.1°N, 11.8°E, 10 m above sea level, in Italy. The nearest listed city is Cerveteri, 27 km away.
Topography around Civitavecchia
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Civitavecchia.
Within 3 km, the terrain around Civitavecchia has only modest variations in elevation — a maximum elevation change of 178 m around an average of 37 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 636 m; within 80 km, large variations in elevation — a maximum elevation change of 1,119 m.
The land around Civitavecchia is covered by water (38%) and artificial surfaces (25%) within 3 km, water (54%) within 16 km, and water (37%) and trees (32%) 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 Civitavecchia (42.0932°, 11.7967°, 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).