Vernon in Fall
In fall (September, October and November), Vernon sees average daytime highs around 15°C and overnight lows near 8°C, with 164 mm of precipitation over about 31 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 22°C in early September to 9°C by late November. The sky is clear or mostly clear about 16% of the time across fall, and the air most often feels dry.
Fall is Vernon's 2nd-best season to visit on our travel score. For the whole year in context, see Vernon's year-round climate.
- Avg daytime high
- 15°C
- 2nd-warmest season
- Avg overnight low
- 8°C
- Precipitation
- 164 mm
- 31 wet days
- Avg wind
- 13 km/h
- Travel score
- 4.4
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Vernon in Fall
Over the season highs ease from about 22°C in early September to 9°C by late November.
A typical fall day in Vernon reaches about 15°C and drops to 8°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Vernon
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.
Vernon 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 | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 7° / 2° | 53 | 11.1 | 0.9 | 8.5 | 0.8 |
| Feb | 8° / 2° | 46 | 10 | 1.1 | 9.8 | 1.2 |
| Mar | 11° / 4° | 51 | 10.5 | 0.4 | 11.6 | 2.8 |
| Apr | 15° / 6° | 51 | 11 | 0 | 13.4 | 4.2 |
| May | 18° / 9° | 62 | 11.5 | 0 | 15 | 5.4 |
| Jun | 21° / 12° | 58 | 10.2 | 0 | 15.9 | 6.3 |
| Jul | 24° / 14° | 50 | 9.1 | 0 | 15.6 | 7.0 |
| Aug | 24° / 14° | 56 | 9.2 | 0 | 14.2 | 6.9 |
| Sep | 20° / 11° | 44 | 8.5 | 0 | 12.4 | 6.4 |
| Oct | 16° / 8° | 62 | 10.9 | 0 | 10.5 | 4.6 |
| Nov | 10° / 5° | 59 | 11.2 | 0.2 | 8.9 | 2.3 |
| Dec | 7° / 3° | 68 | 12.4 | 0.9 | 8.1 | 1.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 16% of the time across fall.
Chance of precipitation in Fall
Vernon gets around 164 mm of rain and snow over 31 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 13 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 18 min in early September to 8 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 2.2 kWh/m².
Is fall a good time to visit Vernon?
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 Vernon for sightseeing.
What to pack for Vernon in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Vernon sees daytime highs around 15°C and nights near 8°C. Pack a warm layer. Worth having: rain gear. About 31 days see rain.
UV index in Vernon in Fall
Clear-sky midday UV across fall averages around 3. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Vernon peaks around August 11 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 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 3 | Moderate |
| Apr | 5 | Moderate |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 7 | High |
| Aug | 7 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Vernon 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 Vernon is worst in April — around 18 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) | 15 | 15 | 18 | 18 | 15 | 14 | 12 | 13 | 13 | 13 | 13 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 15 | Moderate |
| Mar | 18 | Moderate |
| Apr | 18 | Moderate |
| May | 15 | Moderate |
| Jun | 14 | Moderate |
| Jul | 12 | Good |
| Aug | 13 | Moderate |
| Sep | 13 | Moderate |
| Oct | 13 | Moderate |
| Nov | 13 | Moderate |
| Dec | 13 | Moderate |
Where is Vernon?
Vernon sits at 49.1°N, 1.5°E, 29 m above sea level, in France. The nearest listed city is Mantes-la-Jolie, 22 km away.
Topography around Vernon
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Vernon.
Within 3 km, the terrain around Vernon has only modest variations in elevation — a maximum elevation change of 161 m around an average of 80 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 177 m; within 80 km, significant variations in elevation — a maximum elevation change of 324 m.
The land around Vernon is covered by trees (53%) within 3 km, cropland (45%) and trees (36%) within 16 km, and cropland (50%) and trees (30%) 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 Vernon (49.0929°, 1.4633°, elevation 29 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.