Dieppe weather in September
In September, Dieppe sees average daytime highs of 18°C and overnight lows near 13°C, with 63 mm of rain across 11 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.
Highs ease over the month, from about 19°C in the first days to 17°C by the end. The sky is clear or mostly clear about 21% of the time in September, and the air most often feels dry.
Daylight stretches from about 13 h 18 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Dieppe's 5th-clearest and 8th-windiest month. For the whole year in context, see Dieppe's year-round climate.
- Daytime high
- 18°
- 3rd warmest
- Overnight low
- 13°
- 10th coldest
- Rainfall
- 63 mm
- 11 wet days
- Daylight
- 12 h 24 min
- 6:39 AM – 7:01 PM
- Cloud cover
- 63%
- 5th clearest
- Wind
- 18 km/h
- 8th windiest
- Solar energy
- 3.54 kWh/m²
- Travel score
- 5.7
- out of 10
- Air quality
- Moderate
- PM2.5 11.3 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 19°C in the first days to 17°C by the end.
A typical September day in Dieppe reaches about 18°C in the afternoon and slips back to 13°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 22°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 |
| Avg low (°C) | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 19 | 15 |
| 2 | 19 | 14 |
| 3 | 19 | 14 |
| 4 | 19 | 14 |
| 5 | 19 | 14 |
| 6 | 19 | 14 |
| 7 | 19 | 14 |
| 8 | 19 | 14 |
| 9 | 19 | 14 |
| 10 | 19 | 14 |
| 11 | 19 | 14 |
| 12 | 19 | 14 |
| 13 | 19 | 14 |
| 14 | 18 | 14 |
| 15 | 18 | 13 |
| 16 | 18 | 13 |
| 17 | 18 | 13 |
| 18 | 18 | 13 |
| 19 | 18 | 13 |
| 20 | 18 | 13 |
| 21 | 18 | 13 |
| 22 | 18 | 13 |
| 23 | 18 | 13 |
| 24 | 18 | 13 |
| 25 | 18 | 13 |
| 26 | 17 | 13 |
| 27 | 17 | 13 |
| 28 | 17 | 13 |
| 29 | 17 | 12 |
| 30 | 17 | 12 |
How September really feels in Dieppe
Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
September 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 September compares with the rest of the year at a glance. September is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.
| 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 September
The sky is clear or mostly clear about 21% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 59%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 46 | 46 | 46 | 46 | 45 | 44 | 44 | 42 | 42 | 42 | 41 | 41 | 40 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 38 | 37 | 37 | 35 | 35 | 33 |
| Cloudier (%) | 54 | 54 | 54 | 54 | 55 | 56 | 56 | 58 | 58 | 58 | 59 | 59 | 60 | 59 | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 60 | 60 | 62 | 63 | 63 | 65 | 65 | 67 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 46 | 54 |
| 2 | 46 | 54 |
| 3 | 46 | 54 |
| 4 | 46 | 54 |
| 5 | 45 | 55 |
| 6 | 44 | 56 |
| 7 | 44 | 56 |
| 8 | 42 | 58 |
| 9 | 42 | 58 |
| 10 | 42 | 58 |
| 11 | 41 | 59 |
| 12 | 41 | 59 |
| 13 | 40 | 60 |
| 14 | 41 | 59 |
| 15 | 41 | 59 |
| 16 | 41 | 59 |
| 17 | 41 | 59 |
| 18 | 41 | 59 |
| 19 | 41 | 59 |
| 20 | 40 | 60 |
| 21 | 40 | 60 |
| 22 | 40 | 60 |
| 23 | 40 | 60 |
| 24 | 40 | 60 |
| 25 | 38 | 62 |
| 26 | 37 | 63 |
| 27 | 37 | 63 |
| 28 | 35 | 65 |
| 29 | 35 | 65 |
| 30 | 33 | 67 |
Chance of precipitation in September
Dieppe gets around 63 mm of rain over 11 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 37% and peaks near 46% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 35 | 35 | 35 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 46 |
| Rain chance (%) | |
|---|---|
| 1 | 32 |
| 2 | 32 |
| 3 | 32 |
| 4 | 33 |
| 5 | 33 |
| 6 | 33 |
| 7 | 34 |
| 8 | 34 |
| 9 | 35 |
| 10 | 35 |
| 11 | 35 |
| 12 | 36 |
| 13 | 36 |
| 14 | 36 |
| 15 | 36 |
| 16 | 36 |
| 17 | 37 |
| 18 | 37 |
| 19 | 37 |
| 20 | 38 |
| 21 | 38 |
| 22 | 39 |
| 23 | 40 |
| 24 | 41 |
| 25 | 42 |
| 26 | 43 |
| 27 | 44 |
| 28 | 45 |
| 29 | 46 |
| 30 | 46 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 60% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 46 | 48 | 49 | 50 | 52 | 53 | 54 | 54 | 56 | 57 | 58 | 59 | 61 | 61 | 62 | 63 | 65 | 65 | 65 | 66 | 66 | 66 | 66 | 66 | 67 | 67 | 67 | 68 | 69 | 70 |
| Comfortable (%) | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 33 | 32 | 31 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 29 |
| Humid (%) | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 10 | 10 | 9 | 8 | 7 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 46 | 39 | 14 |
| 2 | 48 | 38 | 14 |
| 3 | 49 | 37 | 14 |
| 4 | 50 | 36 | 14 |
| 5 | 52 | 35 | 13 |
| 6 | 53 | 34 | 13 |
| 7 | 54 | 33 | 13 |
| 8 | 54 | 33 | 13 |
| 9 | 56 | 32 | 12 |
| 10 | 57 | 31 | 12 |
| 11 | 58 | 30 | 12 |
| 12 | 59 | 30 | 11 |
| 13 | 61 | 29 | 10 |
| 14 | 61 | 29 | 10 |
| 15 | 62 | 29 | 9 |
| 16 | 63 | 29 | 8 |
| 17 | 65 | 28 | 7 |
| 18 | 65 | 29 | 6 |
| 19 | 65 | 29 | 6 |
| 20 | 66 | 29 | 5 |
| 21 | 66 | 30 | 4 |
| 22 | 66 | 30 | 4 |
| 23 | 66 | 31 | 3 |
| 24 | 66 | 31 | 3 |
| 25 | 67 | 31 | 2 |
| 26 | 67 | 31 | 2 |
| 27 | 67 | 31 | 2 |
| 28 | 68 | 31 | 1 |
| 29 | 69 | 30 | 1 |
| 30 | 70 | 29 | 1 |
Wind in September
Winds average 18 km/h in September.
Across September, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 18 | light breeze |
| 2 | 18 | light breeze |
| 3 | 18 | light breeze |
| 4 | 18 | light breeze |
| 5 | 18 | light breeze |
| 6 | 18 | light breeze |
| 7 | 18 | light breeze |
| 8 | 18 | light breeze |
| 9 | 18 | light breeze |
| 10 | 18 | light breeze |
| 11 | 18 | light breeze |
| 12 | 18 | light breeze |
| 13 | 18 | light breeze |
| 14 | 18 | light breeze |
| 15 | 18 | light breeze |
| 16 | 18 | light breeze |
| 17 | 18 | light breeze |
| 18 | 18 | light breeze |
| 19 | 18 | light breeze |
| 20 | 18 | light breeze |
| 21 | 18 | light breeze |
| 22 | 19 | light breeze |
| 23 | 19 | light breeze |
| 24 | 19 | light breeze |
| 25 | 19 | light breeze |
| 26 | 19 | light breeze |
| 27 | 19 | light breeze |
| 28 | 19 | light breeze |
| 29 | 19 | light breeze |
| 30 | 19 | light breeze |
Sunrise & sunset in September
Daylight runs from about 13 h 18 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 108 minutes over September. Sunrise moves from 6:16 AM to 7:01 AM, and sunset from 7:35 PM to 6:29 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.3 | 13.3 | 13.2 | 13.1 | 13.1 | 13.0 | 12.9 | 12.9 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.4 | 12.4 | 12.3 | 12.2 | 12.2 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.7 | 11.7 | 11.6 | 11.5 | 11.5 |
| Sunrise (AM) | 6:16 | 6:18 | 6:19 | 6:21 | 6:22 | 6:24 | 6:25 | 6:27 | 6:28 | 6:30 | 6:31 | 6:33 | 6:34 | 6:36 | 6:37 | 6:39 | 6:41 | 6:42 | 6:44 | 6:45 | 6:47 | 6:48 | 6:50 | 6:51 | 6:53 | 6:55 | 6:56 | 6:58 | 6:59 | 7:01 |
| Sunset (PM) | 7:35 | 7:33 | 7:30 | 7:28 | 7:26 | 7:24 | 7:21 | 7:19 | 7:17 | 7:15 | 7:12 | 7:10 | 7:08 | 7:06 | 7:03 | 7:01 | 6:59 | 6:56 | 6:54 | 6:52 | 6:50 | 6:47 | 6:45 | 6:43 | 6:40 | 6:38 | 6:36 | 6:34 | 6:31 | 6:29 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.3 | 6:16 | 7:35 |
| 2 | 13.3 | 6:18 | 7:33 |
| 3 | 13.2 | 6:19 | 7:30 |
| 4 | 13.1 | 6:21 | 7:28 |
| 5 | 13.1 | 6:22 | 7:26 |
| 6 | 13.0 | 6:24 | 7:24 |
| 7 | 12.9 | 6:25 | 7:21 |
| 8 | 12.9 | 6:27 | 7:19 |
| 9 | 12.8 | 6:28 | 7:17 |
| 10 | 12.7 | 6:30 | 7:15 |
| 11 | 12.7 | 6:31 | 7:12 |
| 12 | 12.6 | 6:33 | 7:10 |
| 13 | 12.6 | 6:34 | 7:08 |
| 14 | 12.5 | 6:36 | 7:06 |
| 15 | 12.4 | 6:37 | 7:03 |
| 16 | 12.4 | 6:39 | 7:01 |
| 17 | 12.3 | 6:41 | 6:59 |
| 18 | 12.2 | 6:42 | 6:56 |
| 19 | 12.2 | 6:44 | 6:54 |
| 20 | 12.1 | 6:45 | 6:52 |
| 21 | 12.0 | 6:47 | 6:50 |
| 22 | 12.0 | 6:48 | 6:47 |
| 23 | 11.9 | 6:50 | 6:45 |
| 24 | 11.9 | 6:51 | 6:43 |
| 25 | 11.8 | 6:53 | 6:40 |
| 26 | 11.7 | 6:55 | 6:38 |
| 27 | 11.7 | 6:56 | 6:36 |
| 28 | 11.6 | 6:58 | 6:34 |
| 29 | 11.5 | 6:59 | 6:31 |
| 30 | 11.5 | 7:01 | 6:29 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 3.54 kWh/m².
For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 6.06 kWh/m² in June across the year — September's 3.54 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.2 | 4.2 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.8 | 3.8 | 3.7 | 3.7 | 3.6 | 3.6 | 3.5 | 3.5 | 3.4 | 3.4 | 3.3 | 3.3 | 3.2 | 3.2 | 3.1 | 3.1 | 3.0 | 2.9 | 2.9 | 2.8 | 2.8 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.2 | Bright |
| 2 | 4.2 | Bright |
| 3 | 4.1 | Bright |
| 4 | 4.1 | Bright |
| 5 | 4.0 | Bright |
| 6 | 4.0 | Bright |
| 7 | 4.0 | Moderate |
| 8 | 3.9 | Moderate |
| 9 | 3.9 | Moderate |
| 10 | 3.8 | Moderate |
| 11 | 3.8 | Moderate |
| 12 | 3.7 | Moderate |
| 13 | 3.7 | Moderate |
| 14 | 3.6 | Moderate |
| 15 | 3.6 | Moderate |
| 16 | 3.5 | Moderate |
| 17 | 3.5 | Moderate |
| 18 | 3.4 | Moderate |
| 19 | 3.4 | Moderate |
| 20 | 3.3 | Moderate |
| 21 | 3.3 | Moderate |
| 22 | 3.2 | Moderate |
| 23 | 3.2 | Moderate |
| 24 | 3.1 | Moderate |
| 25 | 3.1 | Moderate |
| 26 | 3.0 | Moderate |
| 27 | 2.9 | Moderate |
| 28 | 2.9 | Moderate |
| 29 | 2.8 | Moderate |
| 30 | 2.8 | Moderate |
Is September a good time to visit Dieppe?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Dieppe for sightseeing.
What to pack for Dieppe in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Dieppe sees daytime highs around 18°C and nights near 13°C. Worth packing: rain gear. About 11 days see rain.
Sea temperature near Dieppe in September
The nearest coast averages about 18°C in September — 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 September
Clear-sky midday UV in September peaks 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 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 September
Average fine-particle pollution (PM2.5) through the year — so you can see where September 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).