Climate and average weather in Casalnuovo di Napoli
In Casalnuovo di Napoli, the summers are humid, hot, fairly dry, and clear and the winters are cool and partly cloudy.
Over the course of the year, the temperature in Casalnuovo di Napoli typically varies from 6°C to 28°C, and is rarely below 2°C or above 32°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 Casalnuovo di Napoli for warm-weather activities is from early May to mid October.
- Hottest
- Aug
- 28°
- Coldest
- Jan
- 6°
- Wettest
- Nov
- 180 mm
- Driest
- Jul
- 19 mm
- Rain / yr
- 1105 mm
- 112 wet days
- Daylight
- 9.1–14.9 h
- shortest–longest
- Elevation
- 26 m
- 40.9°N
- Clearest
- Jul
- 20% cloud
Casalnuovo di Napoli is chief town of the homonym municipality.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Casalnuovo di Napoli 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 early May to mid October.
Temperature through the year
Daily average highs and lows in Casalnuovo di Napoli, 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 11 to September 17, with daily high temperatures above 24°C. The hottest month of the year in Casalnuovo di Napoli is August, with an average high of 28°C and low of 21°C.
The cool season lasts 3.9 months, from November 25 to March 23, with daily high temperatures below 15°C. The coldest month of the year in Casalnuovo di Napoli is January, with an average low of 6°C and high of 12°C.
Days typically run about 7°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 12 | 14 | 17 | 21 | 25 | 28 | 28 | 25 | 21 | 16 | 13 |
| Avg low (°C) | 6 | 6 | 8 | 10 | 14 | 18 | 21 | 21 | 18 | 14 | 11 | 7 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 12 | 6 |
| Feb | 12 | 6 |
| Mar | 14 | 8 |
| Apr | 17 | 10 |
| May | 21 | 14 |
| Jun | 25 | 18 |
| Jul | 28 | 21 |
| Aug | 28 | 21 |
| Sep | 25 | 18 |
| Oct | 21 | 14 |
| Nov | 16 | 11 |
| Dec | 13 | 7 |
Average hourly temperature in Casalnuovo di Napoli
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 28°C, and coldest before dawn in January, near 6°C.
Casalnuovo di Napoli 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° / 6° | 109 | 11 | 9.4 | 3.0 |
| Feb | 12° / 6° | 103 | 10.7 | 10.4 | 3.1 |
| Mar | 14° / 8° | 106 | 10.9 | 11.7 | 4.3 |
| Apr | 17° / 10° | 97 | 11.7 | 13.1 | 5.3 |
| May | 21° / 14° | 64 | 8.4 | 14.3 | 6.9 |
| Jun | 25° / 18° | 34 | 5.6 | 14.9 | 8.0 |
| Jul | 28° / 21° | 19 | 4 | 14.6 | 7.8 |
| Aug | 28° / 21° | 23 | 4.2 | 13.6 | 7.2 |
| Sep | 25° / 18° | 94 | 9 | 12.3 | 7.3 |
| Oct | 21° / 14° | 135 | 10.5 | 10.9 | 6.6 |
| Nov | 16° / 11° | 180 | 13.4 | 9.7 | 4.8 |
| Dec | 13° / 7° | 141 | 12.4 | 9.1 | 3.4 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Casalnuovo di Napoli gets about 1105 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 7.8 months, from around Sep 14 to May 7, peaking in November at about 45% 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 180 mm over about 13 wet days; July is the driest, with 19 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 36 | 39 | 34 | 38 | 28 | 18 | 13 | 15 | 30 | 34 | 44 | 40 |
| Rain days | 11 | 11 | 11 | 12 | 8 | 6 | 4 | 4 | 9 | 11 | 13 | 12 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 36 | 11 |
| Feb | 39 | 11 |
| Mar | 34 | 11 |
| Apr | 38 | 12 |
| May | 28 | 8 |
| Jun | 18 | 6 |
| Jul | 13 | 4 |
| Aug | 15 | 4 |
| Sep | 30 | 9 |
| Oct | 34 | 11 |
| Nov | 44 | 13 |
| Dec | 40 | 12 |
Monthly rainfall
Over a full year, Casalnuovo di Napoli collects about 1105 mm of rain across 112 wet days — roughly 92 mm in an average month.
It doesn’t fall evenly. November is the wettest month with 180 mm, while July is the driest at just 19 mm. The three wettest months alone bring about 41% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 109 | 103 | 106 | 97 | 64 | 34 | 19 | 23 | 94 | 135 | 180 | 141 |
| Rain days | 11 | 11 | 11 | 12 | 8 | 6 | 4 | 4 | 9 | 11 | 13 | 12 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 109 | 11 |
| Feb | 103 | 11 |
| Mar | 106 | 11 |
| Apr | 97 | 12 |
| May | 64 | 8 |
| Jun | 34 | 6 |
| Jul | 19 | 4 |
| Aug | 23 | 4 |
| Sep | 94 | 9 |
| Oct | 135 | 11 |
| Nov | 180 | 13 |
| Dec | 141 | 12 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Casalnuovo di Napoli, 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 12 and lasts for 4.7 months, ending around September 30. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 95% of the time on average.
The cloudier part of the year begins around October 1 and lasts for 7.3 months, ending around May 11. The cloudiest month is November, when it is overcast or mostly cloudy 49% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 52 | 53 | 56 | 58 | 67 | 82 | 95 | 92 | 73 | 60 | 51 | 51 |
| Cloudier (%) | 48 | 47 | 44 | 42 | 33 | 18 | 5 | 8 | 27 | 40 | 49 | 49 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 52 | 48 |
| Feb | 53 | 47 |
| Mar | 56 | 44 |
| Apr | 58 | 42 |
| May | 67 | 33 |
| Jun | 82 | 18 |
| Jul | 95 | 5 |
| Aug | 92 | 8 |
| Sep | 73 | 27 |
| Oct | 60 | 40 |
| Nov | 51 | 49 |
| Dec | 51 | 49 |
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 10, brings about 14 h 54 min of light; the shortest, around January 1, only 9 h 06 min — a swing of roughly 5 h 48 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.4 | 10.4 | 11.7 | 13.1 | 14.3 | 14.9 | 14.6 | 13.6 | 12.3 | 10.9 | 9.7 | 9.1 |
| Sunrise (AM) | 7:31 | 7:06 | 6:22 | 5:30 | 4:51 | 4:35 | 4:48 | 5:17 | 5:49 | 6:21 | 6:58 | 7:27 |
| Sunset (PM) | 4:53 | 5:28 | 6:02 | 6:36 | 7:07 | 7:30 | 7:28 | 6:56 | 6:05 | 5:14 | 4:38 | 4:31 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.4 | 7:31 | 4:53 |
| Feb | 10.4 | 7:06 | 5:28 |
| Mar | 11.7 | 6:22 | 6:02 |
| Apr | 13.1 | 5:30 | 6:36 |
| May | 14.3 | 4:51 | 7:07 |
| Jun | 14.9 | 4:35 | 7:30 |
| Jul | 14.6 | 4:48 | 7:28 |
| Aug | 13.6 | 5:17 | 6:56 |
| Sep | 12.3 | 5:49 | 6:05 |
| Oct | 10.9 | 6:21 | 5:14 |
| Nov | 9.7 | 6:58 | 4:38 |
| Dec | 9.1 | 7:27 | 4:31 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Casalnuovo di Napoli averages about 15 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 10 and 26 days.
The sunnier stretch runs 4.1 months, from around May 26 to Sep 26. The sunniest month is August, with roughly 25 sunny days (brilliant).
The greyest month is November, down near 10 sunny days — about 59% fewer than the August peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 11 | 11 | 11 | 11 | 14 | 20 | 26 | 25 | 17 | 14 | 10 | 11 |
| Sky | Mixed | Mixed | Mixed | Mixed | Mixed | Bright | Brilliant | Brilliant | Bright | Mixed | Mixed | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 11 | Mixed |
| Feb | 11 | Mixed |
| Mar | 11 | Mixed |
| Apr | 11 | Mixed |
| May | 14 | Mixed |
| Jun | 20 | Bright |
| Jul | 26 | Brilliant |
| Aug | 25 | Brilliant |
| Sep | 17 | Bright |
| Oct | 14 | Mixed |
| Nov | 10 | Mixed |
| Dec | 11 | 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 Casalnuovo di Napoli, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 4.6 months, from around May 25 to October 11. The muggiest month is August, when the air feels humid, muggy or worse about 92% of the time.
The most comfortable stretch runs from around October 12 to May 24, 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 | 100 | 90 | 40 | 8 | 2 | 2 | 14 | 38 | 80 | 98 |
| Comfortable (%) | 0 | 0 | 0 | 10 | 42 | 22 | 10 | 7 | 24 | 36 | 17 | 2 |
| Humid (%) | 0 | 0 | 0 | 0 | 17 | 41 | 26 | 22 | 34 | 23 | 3 | 0 |
| Muggy (%) | 0 | 0 | 0 | 0 | 1 | 24 | 48 | 51 | 25 | 2 | 0 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 4 | 14 | 18 | 2 | 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 | 90 | 10 | 0 | 0 | 0 |
| May | 40 | 42 | 17 | 1 | 0 |
| Jun | 8 | 22 | 41 | 24 | 4 |
| Jul | 2 | 10 | 26 | 48 | 14 |
| Aug | 2 | 7 | 22 | 51 | 18 |
| Sep | 14 | 24 | 34 | 25 | 2 |
| Oct | 38 | 36 | 23 | 2 | 0 |
| Nov | 80 | 17 | 3 | 0 | 0 |
| Dec | 98 | 2 | 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 Casalnuovo di Napoli is typically calm, near 8 km/h, and varies little with the seasons.
The windier part of the year lasts 5.9 months, from around Oct 21 to Apr 17. The windiest month is December, averaging about 10 km/h (calm).
The calmer part of the year runs from around Apr 18 to Oct 20, with August 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 | 9 | 8 | 7 | 7 | 7 | 7 | 7 | 8 | 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 | 9 | calm |
| Apr | 8 | calm |
| May | 7 | calm |
| Jun | 7 | calm |
| Jul | 7 | calm |
| Aug | 7 | calm |
| Sep | 7 | calm |
| Oct | 8 | calm |
| Nov | 10 | calm |
| Dec | 10 | calm |
Hazard calendar for Casalnuovo di Napoli
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Casalnuovo di Napoli's rainy season runs September–April, when most of the year's rain falls.
Best time to visit Casalnuovo di Napoli
To characterize how pleasant the weather is in Casalnuovo di Napoli throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid October, Casalnuovo di Napoli 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 Casalnuovo di Napoli for general outdoor tourist activities is from early May to mid October, with a peak score in the last week of June.
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) | 3.0 | 3.2 | 4.3 | 5.4 | 6.9 | 8.0 | 7.8 | 7.2 | 7.3 | 6.6 | 4.8 | 3.4 |
| Rating | poor | poor | fair | fair | good | ideal | ideal | good | good | good | fair | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 3.0 | poor |
| Feb | 3.2 | poor |
| Mar | 4.3 | fair |
| Apr | 5.4 | fair |
| May | 6.9 | good |
| Jun | 8.0 | ideal |
| Jul | 7.8 | ideal |
| Aug | 7.2 | good |
| Sep | 7.3 | good |
| Oct | 6.6 | good |
| Nov | 4.8 | fair |
| Dec | 3.4 | 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 Casalnuovo di Napoli for hot-weather activities is from mid June to early September, with a peak score in the second 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 Casalnuovo di Napoli, 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 28°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 12°C), pack a warm layer and rain gear.
In August, Casalnuovo di Napoli sees daytime highs around 28°C and nights near 21°C. Pack light clothes and sun protection. About 4 days see rain.
Sea temperature near Casalnuovo di Napoli
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 26°C and coldest in February near 14°C.
It's comfortable for a long swim from May 26 to Nov 7 — about 5.5 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 | 16 | 19 | 23 | 25 | 26 | 24 | 22 | 19 | 17 |
| Comfort | Cool | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Cool |
| Feb | 14 | Bracing |
| Mar | 14 | Bracing |
| Apr | 16 | Cool |
| May | 19 | Cool |
| Jun | 23 | Refreshing |
| Jul | 25 | Warm |
| Aug | 26 | Warm |
| Sep | 24 | Warm |
| Oct | 22 | Refreshing |
| Nov | 19 | Cool |
| Dec | 17 | Cool |
UV index (midday) in Casalnuovo di Napoli 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 Casalnuovo di Napoli peaks around July 16 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 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 4 | 7 | 9 | 10 | 8 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 4 | Moderate |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Average hourly UV index in Casalnuovo di Napoli
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 | 1 | 5 | 4 | 7.5 | 8.5 | 8.5 | 7.5 | 6 | 3 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 3 | 5 | 5.5 | 4.5 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 1 | 0 |
| Mar | 5 | 0 |
| Apr | 4 | 0 |
| May | 7.5 | 3 |
| Jun | 8.5 | 5 |
| Jul | 8.5 | 5.5 |
| Aug | 7.5 | 4.5 |
| Sep | 6 | 0 |
| Oct | 3 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Air quality in Casalnuovo di Napoli 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 Casalnuovo di Napoli is worst in April — around 22 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) | 19 | 20 | 21 | 22 | 18 | 16 | 16 | 16 | 14 | 16 | 16 | 17 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 20 | Moderate |
| Mar | 21 | Moderate |
| Apr | 22 | Moderate |
| May | 18 | Moderate |
| Jun | 16 | Moderate |
| Jul | 16 | Moderate |
| Aug | 16 | Moderate |
| Sep | 14 | Moderate |
| Oct | 16 | Moderate |
| Nov | 16 | Moderate |
| Dec | 17 | Moderate |
Growing season
Casalnuovo di Napoli 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 (%) | 98 | 98 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 98 | 0 |
| Feb | 98 | 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 | 99 | 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. Casalnuovo di Napoli banks about 2,297 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 | 31 | 109 | 233 | 345 | 439 | 453 | 338 | 234 | 105 | 10 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 31 |
| Apr | 109 |
| May | 233 |
| Jun | 345 |
| Jul | 439 |
| Aug | 453 |
| Sep | 338 |
| Oct | 234 |
| Nov | 105 |
| Dec | 10 |
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.
Casalnuovo di Napoli receives about 4.3 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.7 and 7.1 kWh/m².
The brighter stretch of the year lasts 6.0 months, from around Mar 22 to Sep 20. The brightest month is June, averaging about 6.9 kWh/m² (intense).
The dimmest month is December, down near 1.7 kWh/m² — roughly 75% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 1.9 | 2.8 | 4.1 | 5.3 | 6.3 | 6.9 | 7.0 | 6.2 | 4.6 | 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 | 2.8 | Moderate |
| Mar | 4.1 | Bright |
| Apr | 5.3 | Bright |
| May | 6.3 | Intense |
| Jun | 6.9 | Intense |
| Jul | 7.0 | Intense |
| Aug | 6.2 | Intense |
| Sep | 4.6 | Bright |
| Oct | 3.2 | Moderate |
| Nov | 2.1 | Moderate |
| Dec | 1.7 | Dim |
Where is Casalnuovo di Napoli?
Casalnuovo di Napoli sits at 40.9°N, 14.3°E, 26 m above sea level, in Italy. The nearest listed city is Arpino, 3.0 km away.
Topography around Casalnuovo di Napoli
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Casalnuovo di Napoli.
Within 3 km, the terrain around Casalnuovo di Napoli has only modest variations in elevation — a maximum elevation change of 56 m around an average of 32 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,279 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,032 m.
The land around Casalnuovo di Napoli is covered by artificial surfaces (46%) and cropland (29%) within 3 km, artificial surfaces (36%) and trees (29%) within 16 km, and water (39%) and trees (37%) 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 Casalnuovo di Napoli (40.9097°, 14.3421°, elevation 26 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).