Ercolano in Fall
In fall (September, October and November), Ercolano sees average daytime highs around 20°C and overnight lows near 18°C, with 398 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 Ercolano's 2nd-best season to visit on our travel score. For the whole year in context, see Ercolano's year-round climate.
- Avg daytime high
- 20°C
- 2nd-warmest season
- Avg overnight low
- 18°C
- Rainfall
- 398 mm
- 32 wet days
- Avg wind
- 14 km/h
- Travel score
- 6.4
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Ercolano 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 Ercolano reaches about 20°C and drops to 18°C overnight. The warmest of the three months is September, the coolest November.
Ercolano 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° / 10° | 122 | 11.5 | 9.4 | 3.3 |
| Feb | 12° / 10° | 101 | 10.6 | 10.4 | 3.3 |
| Mar | 14° / 11° | 95 | 9.8 | 11.7 | 4.1 |
| Apr | 16° / 13° | 74 | 9.3 | 13.1 | 5.1 |
| May | 19° / 17° | 44 | 6 | 14.2 | 7.0 |
| Jun | 23° / 20° | 22 | 3.4 | 14.9 | 8.5 |
| Jul | 26° / 23° | 11 | 2 | 14.6 | 8.9 |
| Aug | 26° / 24° | 18 | 2.6 | 13.6 | 8.6 |
| Sep | 24° / 21° | 86 | 8 | 12.3 | 7.6 |
| Oct | 21° / 18° | 124 | 10.2 | 10.9 | 6.6 |
| Nov | 17° / 14° | 188 | 13.5 | 9.7 | 5.1 |
| Dec | 14° / 11° | 154 | 13.4 | 9.1 | 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
Ercolano gets around 398 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 14 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 hours in early September to 9 h 18 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 3.4 kWh/m².
Hazard calendar for Ercolano
In fall, Ercolano overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Ercolano's rainy season runs September–March, when most of the year's rain falls.
Is fall a good time to visit Ercolano?
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 Ercolano for sightseeing.
What to pack for Ercolano in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Ercolano sees daytime highs around 20°C and nights near 18°C. Worth packing: light clothes, a warm layer, rain gear and sun protection. About 32 days see rain.
Sea temperature near Ercolano in Fall
The nearest coast averages about 22°C across fall — 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 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 in Ercolano 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 Ercolano 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 |
Air quality in Ercolano in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Ercolano is worst in April — around 16 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) | 11 | 14 | 16 | 16 | 14 | 13 | 11 | 12 | 12 | 12 | 10 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 16 | Moderate |
| Apr | 16 | Moderate |
| May | 14 | Moderate |
| Jun | 13 | Moderate |
| Jul | 11 | Good |
| Aug | 12 | Good |
| Sep | 12 | Good |
| Oct | 12 | Good |
| Nov | 10 | Good |
| Dec | 10 | Good |
Where is Ercolano?
Ercolano sits at 40.8°N, 14.4°E, 44 m above sea level, in Italy. The nearest listed city is Portici, 1.0 km away.
Topography around Ercolano
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ercolano.
Within 3 km, the terrain around Ercolano has significant variations in elevation — a maximum elevation change of 376 m around an average of 73 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 Ercolano is covered by artificial surfaces (36%), water (33%) and trees (24%) within 3 km, water (40%), artificial surfaces (26%) and trees (23%) within 16 km, and water (42%) and trees (36%) 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 Ercolano (40.8078°, 14.3501°, elevation 44 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.