Nettuno in Summer
In summer (June, July and August), Nettuno sees average daytime highs around 26°C and overnight lows near 21°C, with 70 mm of rain over about 12 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 22°C in early June to 26°C by late August. The sky is clear or mostly clear about 78% of the time across summer, and the air most often feels muggy.
Summer is Nettuno's best season of the year to visit on our travel score. For the whole year in context, see Nettuno's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 70 mm
- 12 wet days
- Avg wind
- 9 km/h
- Travel score
- 8.2
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Nettuno in Summer
Over the season highs climb from about 22°C in early June to 26°C by late August.
A typical summer day in Nettuno reaches about 26°C and drops to 21°C overnight. The warmest of the three months is August, the coolest June.
Nettuno weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 12° / 7° | 86 | 10.7 | 9.3 | 3.1 |
| Feb | 12° / 7° | 83 | 10.3 | 10.3 | 3.2 |
| Mar | 14° / 9° | 81 | 9.9 | 11.7 | 4.2 |
| Apr | 16° / 11° | 74 | 10.5 | 13.1 | 5.2 |
| May | 20° / 15° | 53 | 8.2 | 14.3 | 6.9 |
| Jun | 24° / 19° | 29 | 5.1 | 14.9 | 8.2 |
| Jul | 27° / 22° | 19 | 3.3 | 14.7 | 8.4 |
| Aug | 27° / 22° | 22 | 3.9 | 13.7 | 8.1 |
| Sep | 24° / 19° | 91 | 9.2 | 12.3 | 7.3 |
| Oct | 20° / 16° | 131 | 11.1 | 10.9 | 6.4 |
| Nov | 16° / 12° | 160 | 13.8 | 9.7 | 4.7 |
| Dec | 13° / 9° | 121 | 12.3 | 9.1 | 3.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 78% of the time across summer.
Chance of precipitation in Summer
Nettuno gets around 70 mm of rain over 12 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 48 min in early June to 13 hours by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.8 kWh/m².
Hazard calendar for Nettuno
None of Nettuno's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Nettuno's rainy season runs September–April, when most of the year's rain falls.
Is summer a good time to visit Nettuno?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Nettuno for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Nettuno in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Nettuno sees daytime highs around 26°C and nights near 21°C. Pack light clothes and sun protection. About 12 days see rain.
Sea temperature near Nettuno in Summer
The nearest coast averages about 24°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
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 30 to Nov 2 — about 5.2 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 | 18 | 22 | 25 | 26 | 24 | 22 | 19 | 17 |
| 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 | 16 | Cool |
| May | 18 | Cool |
| Jun | 22 | Refreshing |
| Jul | 25 | Warm |
| Aug | 26 | Warm |
| Sep | 24 | Refreshing |
| Oct | 22 | Refreshing |
| Nov | 19 | Cool |
| Dec | 17 | Cool |
UV index in Nettuno in Summer
Clear-sky midday UV across summer averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nettuno peaks around July 15 at about 10 (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 | 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 | 1 | 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 |
Where is Nettuno?
Nettuno sits at 41.5°N, 12.7°E, 11 m above sea level, in Italy. The nearest listed city is Anzio, 4.0 km away.
Topography around Nettuno
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nettuno.
Within 3 km, the terrain around Nettuno has only modest variations in elevation — a maximum elevation change of 61 m around an average of 16 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 95 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,137 m.
The land around Nettuno is covered by water (38%) and artificial surfaces (24%) within 3 km, water (53%) within 16 km, and water (45%) 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 Nettuno (41.4579°, 12.6639°, elevation 11 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.