Acilia-Castel Fusano-Ostia Antica in Fall
In fall (September, October and November), Acilia-Castel Fusano-Ostia Antica sees average daytime highs around 20°C and overnight lows near 17°C, with 379 mm of rain over about 32 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Over the season highs ease from about 25°C in early September to 15°C by late November. The sky is clear or mostly clear about 49% of the time across fall, and the air most often feels dry.
Fall is Acilia-Castel Fusano-Ostia Antica's 2nd-best season to visit on our travel score. For the whole year in context, see Acilia-Castel Fusano-Ostia Antica's year-round climate.
- Avg daytime high
- 20°C
- 2nd-warmest season
- Avg overnight low
- 17°C
- Rainfall
- 379 mm
- 32 wet days
- Avg wind
- 15 km/h
- Travel score
- 6.4
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Acilia-Castel Fusano-Ostia Antica in Fall
Over the season highs ease from about 25°C in early September to 15°C by late November.
A typical fall day in Acilia-Castel Fusano-Ostia Antica reaches about 20°C and drops to 17°C overnight. The warmest of the three months is September, the coolest November.
Acilia-Castel Fusano-Ostia Antica weather by month
How the three fall months (September, October and November) 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° / 9° | 81 | 10.6 | 9.3 | 3.4 |
| Feb | 12° / 9° | 78 | 9.6 | 10.3 | 3.4 |
| Mar | 14° / 10° | 72 | 8.6 | 11.7 | 4.3 |
| Apr | 16° / 12° | 61 | 8 | 13.1 | 5.3 |
| May | 19° / 16° | 40 | 6 | 14.3 | 7.1 |
| Jun | 23° / 20° | 22 | 3.3 | 15 | 8.5 |
| Jul | 25° / 23° | 15 | 1.8 | 14.7 | 9.0 |
| Aug | 26° / 23° | 21 | 2.6 | 13.7 | 8.6 |
| Sep | 23° / 20° | 86 | 7.9 | 12.3 | 7.6 |
| Oct | 20° / 17° | 132 | 10.4 | 10.9 | 6.6 |
| Nov | 17° / 13° | 161 | 13.3 | 9.6 | 5.0 |
| Dec | 13° / 10° | 115 | 11.7 | 9 | 3.8 |
Cloud cover in Fall
The sky is clear or mostly clear about 49% of the time across fall.
Chance of precipitation in Fall
Acilia-Castel Fusano-Ostia Antica gets around 379 mm of rain over 32 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 15 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 hours in early September to 9 h 12 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.3 kWh/m².
Hazard calendar for Acilia-Castel Fusano-Ostia Antica
In fall, Acilia-Castel Fusano-Ostia Antica overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Acilia-Castel Fusano-Ostia Antica's rainy season runs September–February, when most of the year's rain falls.
Is fall a good time to visit Acilia-Castel Fusano-Ostia Antica?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Acilia-Castel Fusano-Ostia Antica for sightseeing.
What to pack for Acilia-Castel Fusano-Ostia Antica in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Acilia-Castel Fusano-Ostia Antica sees daytime highs around 20°C and nights near 17°C. Worth packing: light clothes, a warm layer, rain gear and sun protection. About 32 days see rain.
Sea temperature near Acilia-Castel Fusano-Ostia Antica in Fall
The nearest coast averages about 21°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in August at about 26°C and coldest in February near 14°C.
It's comfortable for a long swim from May 31 to Nov 1 — about 5.1 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 | 25 | 26 | 24 | 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 | 25 | Warm |
| Aug | 26 | Warm |
| Sep | 24 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Acilia-Castel Fusano-Ostia Antica in Fall
Clear-sky midday UV across fall averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Acilia-Castel Fusano-Ostia Antica peaks around July 15 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 | 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 Acilia-Castel Fusano-Ostia Antica?
Acilia-Castel Fusano-Ostia Antica sits at 41.8°N, 12.3°E, 5 m above sea level, in Italy. The nearest listed city is Casal Palocco, 2.0 km away.
Topography around Acilia-Castel Fusano-Ostia Antica
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Acilia-Castel Fusano-Ostia Antica.
Within 3 km, the terrain around Acilia-Castel Fusano-Ostia Antica has only modest variations in elevation — a maximum elevation change of 53 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 135 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,840 m.
The land around Acilia-Castel Fusano-Ostia Antica is covered by artificial surfaces (37%) and grassland (29%) within 3 km, water (34%) and trees (21%) within 16 km, and trees (39%) and water (33%) 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 Acilia-Castel Fusano-Ostia Antica (41.7634°, 12.3308°, elevation 5 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.