Dieppe in Fall
In fall (September, October and November), Dieppe sees average daytime highs around 15°C and overnight lows near 11°C, with 245 mm of precipitation over about 41 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 19°C in early September to 9°C by late November. The sky is clear or mostly clear about 15% of the time across fall, and the air most often feels dry.
Fall is Dieppe's 2nd-best season to visit on our travel score. For the whole year in context, see Dieppe's year-round climate.
- Avg daytime high
- 15°C
- 2nd-warmest season
- Avg overnight low
- 11°C
- Precipitation
- 245 mm
- 41 wet days
- Avg wind
- 20 km/h
- Travel score
- 4.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Dieppe in Fall
Over the season highs ease from about 19°C in early September to 9°C by late November.
A typical fall day in Dieppe reaches about 15°C and drops to 11°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Dieppe
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.
Dieppe 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 | 8° / 4° | 74 | 13.2 | 0.7 | 8.4 | 1.0 |
| Feb | 8° / 4° | 61 | 12.3 | 0.8 | 9.7 | 1.1 |
| Mar | 10° / 6° | 58 | 11.6 | 0.5 | 11.5 | 2.1 |
| Apr | 12° / 7° | 55 | 11 | 0.1 | 13.5 | 3.2 |
| May | 15° / 10° | 61 | 11.3 | 0 | 15.1 | 4.4 |
| Jun | 18° / 13° | 58 | 10.4 | 0 | 16 | 5.6 |
| Jul | 20° / 15° | 54 | 10.5 | 0 | 15.7 | 6.3 |
| Aug | 20° / 15° | 69 | 11.1 | 0 | 14.3 | 6.2 |
| Sep | 18° / 13° | 63 | 11 | 0 | 12.4 | 5.7 |
| Oct | 15° / 11° | 89 | 14.4 | 0 | 10.5 | 4.0 |
| Nov | 11° / 8° | 93 | 15.7 | 0.1 | 8.8 | 2.3 |
| Dec | 8° / 5° | 100 | 14.9 | 0.7 | 8 | 1.3 |
Cloud cover in Fall
The sky is clear or mostly clear about 15% of the time across fall.
Chance of precipitation in Fall
Dieppe gets around 245 mm of rain and snow over 41 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 20 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 18 min in early September to 8 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 2.3 kWh/m².
Is fall a good time to visit Dieppe?
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 Dieppe for sightseeing.
What to pack for Dieppe in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Dieppe sees daytime highs around 15°C and nights near 11°C. Pack a warm layer and rain gear. Worth having: a windbreaker. About 41 days see rain.
Sea temperature near Dieppe 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 15 km away) is warmest in August at about 18°C and coldest in February near 8°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) | 8 | 8 | 8 | 10 | 12 | 15 | 17 | 18 | 18 | 16 | 13 | 10 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 8 | Bracing |
| Feb | 8 | Bracing |
| Mar | 8 | Bracing |
| Apr | 10 | Bracing |
| May | 12 | Bracing |
| Jun | 15 | Bracing |
| Jul | 17 | Cool |
| Aug | 18 | Cool |
| Sep | 18 | Cool |
| Oct | 16 | Cool |
| Nov | 13 | Bracing |
| Dec | 10 | Bracing |
UV index in Dieppe 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 Dieppe peaks around June 19 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 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 4 | 6 | 7 | 6 | 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 | 4 | Moderate |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 6 | High |
| Aug | 7 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Dieppe 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 Dieppe is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 8 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Dieppe's WHO annual average of 11.3 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 11 | 15 | 15 | 14 | 12 | 11 | 11 | 11 | 9 | 8 | 9 |
| Level | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 11 | Good |
| Mar | 15 | Moderate |
| Apr | 15 | Moderate |
| May | 14 | Moderate |
| Jun | 12 | Moderate |
| Jul | 11 | Good |
| Aug | 11 | Good |
| Sep | 11 | Good |
| Oct | 9 | Good |
| Nov | 8 | Good |
| Dec | 9 | Good |
Where is Dieppe?
Dieppe sits at 49.9°N, 1.1°E, 9 m above sea level, in France. The nearest listed city is Mont-Saint-Aignan, 51 km away.
Topography around Dieppe
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dieppe.
Within 3 km, the terrain around Dieppe has only modest variations in elevation — a maximum elevation change of 101 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 191 m; within 80 km, significant variations in elevation — a maximum elevation change of 265 m.
The land around Dieppe is covered by water (34%) and artificial surfaces (24%) within 3 km, water (43%) and cropland (29%) within 16 km, and cropland (38%) and water (29%) 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 Dieppe (49.9216°, 1.0777°, elevation 9 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.