Saint-Herblain in Fall
In fall (September, October and November), Saint-Herblain sees average daytime highs around 17°C and overnight lows near 10°C, with 191 mm of rain over about 30 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 23°C in early September to 11°C by late November. The sky is clear or mostly clear about 22% of the time across fall, and the air most often feels dry.
Fall is Saint-Herblain's 2nd-best season to visit on our travel score. For the whole year in context, see Saint-Herblain's year-round climate.
- Avg daytime high
- 17°C
- 2nd-warmest season
- Avg overnight low
- 10°C
- Rainfall
- 191 mm
- 30 wet days
- Avg wind
- 14 km/h
- Travel score
- 5.1
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Saint-Herblain in Fall
Over the season highs ease from about 23°C in early September to 11°C by late November.
A typical fall day in Saint-Herblain reaches about 17°C and drops to 10°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Saint-Herblain
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Saint-Herblain 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 | 9° / 4° | 70 | 11.5 | 8.7 | 1.7 |
| Feb | 10° / 4° | 54 | 9.4 | 10 | 2.1 |
| Mar | 13° / 5° | 52 | 10 | 11.6 | 3.4 |
| Apr | 15° / 7° | 55 | 10.3 | 13.3 | 4.6 |
| May | 19° / 10° | 58 | 10.4 | 14.8 | 5.8 |
| Jun | 22° / 13° | 44 | 8.2 | 15.6 | 6.7 |
| Jul | 24° / 15° | 40 | 7.1 | 15.3 | 7.4 |
| Aug | 24° / 15° | 46 | 7.4 | 14 | 7.4 |
| Sep | 21° / 12° | 48 | 7.2 | 12.4 | 6.9 |
| Oct | 17° / 10° | 72 | 11.3 | 10.6 | 5.1 |
| Nov | 12° / 7° | 70 | 11.4 | 9.1 | 3.2 |
| Dec | 10° / 4° | 78 | 11.7 | 8.4 | 1.9 |
Cloud cover in Fall
The sky is clear or mostly clear about 22% of the time across fall.
Chance of precipitation in Fall
Saint-Herblain gets around 191 mm of rain over 30 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 h 12 min in early September to 8 h 36 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 2.5 kWh/m².
Is fall a good time to visit Saint-Herblain?
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 Saint-Herblain for sightseeing.
What to pack for Saint-Herblain in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Saint-Herblain sees daytime highs around 17°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 30 days see rain.
Sea temperature near Saint-Herblain in Fall
The nearest coast averages about 16°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 37 km away) is warmest in August at about 19°C and coldest in February near 9°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 10 | 9 | 10 | 12 | 14 | 17 | 18 | 19 | 17 | 16 | 14 | 11 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 10 | Bracing |
| Feb | 9 | Bracing |
| Mar | 10 | Bracing |
| Apr | 12 | Bracing |
| May | 14 | Bracing |
| Jun | 17 | Cool |
| Jul | 18 | Cool |
| Aug | 19 | Cool |
| Sep | 17 | Cool |
| Oct | 16 | Cool |
| Nov | 14 | Bracing |
| Dec | 11 | Bracing |
UV index in Saint-Herblain in Fall
Clear-sky midday UV across fall averages around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Saint-Herblain peaks around August 10 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | High | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 3 | Moderate |
| Apr | 5 | High |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 7 | High |
| Aug | 7 | High |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Saint-Herblain?
Saint-Herblain sits at 47.2°N, 1.7°W, 23 m above sea level, in France. The nearest listed city is Bouguenais, 4.0 km away.
Topography around Saint-Herblain
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint-Herblain.
Within 3 km, the terrain around Saint-Herblain has only modest variations in elevation — a maximum elevation change of 68 m around an average of 26 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 165 m; within 80 km, significant variations in elevation — a maximum elevation change of 340 m.
The land around Saint-Herblain is covered by artificial surfaces (36%), trees (35%) and grassland (23%) within 3 km, grassland (35%) and trees (31%) within 16 km, and cropland (32%) and grassland (31%) within 80 km.
France travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 77% of US
- price level, 2025
- GDP per capita
- $48,986
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.3
- per 100k, 2023
- Road deaths
- 5.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 539
- 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 Saint-Herblain (47.2115°, -1.651°, elevation 23 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.