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September

Dieppe Weather in September with Sea Temperature

September weather in Dieppe includes average daytime air +20°C, nighttime +14°C, average sea temperature +18°C. Daily water temperatures usually range from +17°C to +18°C, which is cool for long swims. The tables below also show air temperature, wind, rain and humidity; for near-term water data, open the current 30-day water temperature forecast.

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Averaged values across several years

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+22°C	+15°C	+18°C	5 m/s	0.4 mm	75%
2Tue	+21°C	+14°C	+18°C	4 m/s	0.6 mm	80%
3Wed	+21°C	+15°C	+18°C	5 m/s	0.3 mm	80%
4Thu	+22°C	+15°C	+18°C	5 m/s	0 mm	76%
5Fri	+21°C	+16°C	+18°C	4 m/s	0.6 mm	75%
6Sat	+22°C	+16°C	+18°C	4 m/s	0.1 mm	72%
7Sun	+24°C	+16°C	+18°C	4 m/s	0.3 mm	70%
8Mon	+21°C	+16°C	+18°C	4 m/s	0.5 mm	77%
9Tue	+21°C	+16°C	+18°C	5 m/s	0.4 mm	79%
10Wed	+20°C	+16°C	+18°C	5 m/s	0.2 mm	76%
11Thu	+19°C	+14°C	+18°C	5 m/s	0.5 mm	75%
12Fri	+19°C	+14°C	+18°C	5 m/s	0.7 mm	74%
13Sat	+20°C	+14°C	+18°C	4 m/s	0.4 mm	73%
14Sun	+21°C	+14°C	+18°C	4 m/s	0.6 mm	74%
15Mon	+21°C	+15°C	+17°C	5 m/s	0 mm	72%
16Tue	+19°C	+15°C	+17°C	5 m/s	0.2 mm	75%
17Wed	+20°C	+14°C	+17°C	6 m/s	0 mm	75%
18Thu	+20°C	+14°C	+18°C	6 m/s	0.8 mm	77%
19Fri	+21°C	+14°C	+17°C	5 m/s	0.1 mm	71%
20Sat	+21°C	+14°C	+18°C	5 m/s	0.3 mm	74%
21Sun	+19°C	+13°C	+18°C	4 m/s	0.3 mm	74%
22Mon	+18°C	+12°C	+17°C	4 m/s	1.1 mm	71%
23Tue	+18°C	+12°C	+17°C	5 m/s	0.9 mm	71%
24Wed	+17°C	+12°C	+17°C	6 m/s	0.8 mm	80%
25Thu	+16°C	+12°C	+17°C	5 m/s	0.3 mm	75%
26Fri	+17°C	+12°C	+17°C	6 m/s	0.8 mm	76%
27Sat	+16°C	+12°C	+17°C	7 m/s	0.8 mm	76%
28Sun	+16°C	+11°C	+17°C	5 m/s	0.3 mm	71%
29Mon	+16°C	+11°C	+17°C	5 m/s	0.3 mm	75%
30Tue	+17°C	+11°C	+17°C	6 m/s	0.2 mm	76%

Sea water temperature by months

Water +18°C

Day and night air temperature

Day +19°C Night +14°C

Weather highs and lows in Dieppe for september

Warmest day: 7 september, +24°C
Coldest night: 30 september, +11°C
Max precipitation: 22 september, 1.1 mm
Warmest sea water: 1 september, +18°C
Coldest sea water: 15 september, +17°C

Climate in Dieppe in september

Average daytime temperature: +20°C
Average nighttime temperature: +14°C
Sea water temperature: —
Precipitation (monthly average): 12.6 mm
Days with precipitation: 4.8
Humidity: 75%
Wind: 5 m/s
Data: 6 years / coverage 100%

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+21°C	+13°C	—	7-8 m/s, SW	0.3 mm	71%
2Tue	+19°C	+12°C	—	7-9 m/s, S	3.1 mm	85%
3Wed	+21°C	+15°C	—	10-11 m/s, SSW	0.2 mm	84%
4Thu	+20°C	+14°C	—	8-10 m/s, SW	0 mm	75%
5Fri	+19°C	+14°C	—	4-5 m/s, WNW	0 mm	74%
6Sat	+24°C	+14°C	—	5-6 m/s, SE	0 mm	60%
7Sun	+24°C	+17°C	—	6-7 m/s, SW	0 mm	56%
8Mon	+19°C	+15°C	—	4-6 m/s, W	0 mm	75%
9Tue	+20°C	+13°C	—	2-4 m/s, SW	0 mm	67%
10Wed	+20°C	+14°C	—	5-8 m/s, S	0.1 mm	63%
11Thu	+18°C	+13°C	—	9-10 m/s, SW	0.4 mm	72%
12Fri	+18°C	+12°C	—	8-10 m/s, WSW	1.1 mm	72%
13Sat	+18°C	+13°C	—	8-10 m/s, WSW	0.8 mm	73%
14Sun	+20°C	+12°C	—	6-9 m/s, S	0.1 mm	80%
15Mon	+19°C	+15°C	—	13-14 m/s, WSW	0.3 mm	74%
16Tue	+17°C	+15°C	—	11-13 m/s, W	0.4 mm	70%
17Wed	+21°C	+14°C	—	6-8 m/s, WSW	0 mm	71%
18Thu	+21°C	+15°C	—	3-4 m/s, WSW	0 mm	84%
19Fri	+28°C	+16°C	—	3-5 m/s, S	0 mm	63%
20Sat	+23°C	+16°C	—	6-8 m/s, S	0.4 mm	68%
21Sun	+16°C	+13°C	—	6-8 m/s, NE	0.1 mm	74%
22Mon	+15°C	+11°C	—	8-10 m/s, NE	0 mm	64%
23Tue	+16°C	+11°C	—	7-8 m/s, NE	0 mm	61%
24Wed	+17°C	+11°C	—	8-9 m/s, NE	0 mm	62%
25Thu	+12°C	+10°C	—	5-6 m/s, NE	0 mm	57%
26Fri	+15°C	+9°C	—	4-5 m/s, E	0.1 mm	70%
27Sat	+17°C	+9°C	—	3 m/s, SSE	0 mm	71%
28Sun	+17°C	+11°C	—	3-5 m/s, ESE	0 mm	64%
29Mon	+17°C	+12°C	—	3-4 m/s, NNE	0 mm	72%
30Tue	+17°C	+11°C	—	3-4 m/s, NE	0 mm	73%

Weather highs and lows in Dieppe for september

Warmest day: 19 september, +28°C
Coldest night: 26 september, +9°C
Max precipitation: 2 september, 3.1 mm
Warmest water: —
Coldest water: —

Climate in Dieppe in september

Year: 2025
Average daytime temperature: +19°C
Average nighttime temperature: +13°C
Water temperature: —
Precipitation (month): 7.4 mm
Days with precipitation: 2
Humidity: 70%
Wind: 6 m/s

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Sun	+27°C	+19°C	+18°C	3-5 m/s, E	0 mm	82%
2Mon	+20°C	+17°C	+18°C	4 m/s, SW	0.1 mm	91%
3Tue	+21°C	+15°C	+18°C	5-6 m/s, SW	0.3 mm	80%
4Wed	+18°C	+14°C	+18°C	3-4 m/s, W	0 mm	78%
5Thu	+16°C	+15°C	+18°C	3-5 m/s, N	3.1 mm	90%
6Fri	+20°C	+15°C	+18°C	3-4 m/s, S	0 mm	82%
7Sat	+24°C	+16°C	+18°C	4-5 m/s, E	0.2 mm	75%
8Sun	+17°C	+14°C	+18°C	6-8 m/s, S	3.3 mm	86%
9Mon	+17°C	+16°C	+18°C	8-9 m/s, WNW	1 mm	85%
10Tue	+18°C	+14°C	+18°C	8-10 m/s, WSW	0.3 mm	80%
11Wed	+15°C	+12°C	+18°C	7-9 m/s, WNW	2.5 mm	69%
12Thu	+13°C	+11°C	+18°C	6-8 m/s, NW	3 mm	67%
13Fri	+15°C	+11°C	+18°C	5-7 m/s, NNW	0.3 mm	70%
14Sat	+16°C	+10°C	+18°C	2-3 m/s, N	0 mm	60%
15Sun	+17°C	+11°C	+17°C	2-3 m/s, WNW	0 mm	66%
16Mon	+18°C	+14°C	+17°C	5-8 m/s, N	0.2 mm	76%
17Tue	+19°C	+14°C	+17°C	7-8 m/s, NE	0 mm	82%
18Wed	+21°C	+14°C	+18°C	7 m/s, NE	0 mm	79%
19Thu	+22°C	+15°C	+17°C	7-8 m/s, ENE	0 mm	67%
20Fri	+21°C	+14°C	+18°C	5-6 m/s, ENE	0 mm	70%
21Sat	+22°C	+15°C	+18°C	4 m/s, SSE	0 mm	76%
22Sun	+18°C	+16°C	+17°C	4 m/s, S	4 mm	88%
23Mon	+19°C	+13°C	+17°C	4-6 m/s, SW	2.2 mm	83%
24Tue	+17°C	+13°C	+17°C	6-7 m/s, WNW	0.9 mm	88%
25Wed	+15°C	+13°C	+17°C	5-6 m/s, SSW	0.9 mm	91%
26Thu	+18°C	+12°C	+17°C	8-9 m/s, SSW	0 mm	86%
27Fri	+13°C	+11°C	+17°C	10-11 m/s, SW	1.1 mm	78%
28Sat	+12°C	+10°C	+17°C	5-7 m/s, NNW	0 mm	63%
29Sun	+13°C	+8°C	+17°C	5-8 m/s, SSE	0 mm	68%
30Mon	+15°C	+12°C	+17°C	12 m/s, SW	0.7 mm	84%

Weather highs and lows in Dieppe for september

Warmest day: 1 september, +27°C
Coldest night: 29 september, +8°C
Max precipitation: 22 september, 4 mm
Warmest water: 1 september, +18°C
Coldest water: 15 september, +17°C

Climate in Dieppe in september

Year: 2024
Average daytime temperature: +18°C
Average nighttime temperature: +14°C
Water temperature: —
Precipitation (month): 24.1 mm
Days with precipitation: 8
Humidity: 78%
Wind: 5 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Fri	+20°C	+16°C	—	5-6 m/s, WSW	2.2 mm	89%
2Sat	+21°C	+16°C	—	3 m/s, ENE	0 mm	86%
3Sun	+22°C	+16°C	—	4-5 m/s, NE	0 mm	82%
4Mon	+25°C	+17°C	—	5 m/s, E	0 mm	70%
5Tue	+27°C	+18°C	—	4 m/s, ESE	0 mm	70%
6Wed	+26°C	+21°C	—	2-3 m/s, NE	0 mm	67%
7Thu	+26°C	+18°C	—	3 m/s, E	0 mm	63%
8Fri	+26°C	+21°C	—	2 m/s, NW	0 mm	63%
9Sat	+29°C	+21°C	—	3 m/s, SE	0 mm	64%
10Sun	+26°C	+20°C	—	3-4 m/s, WSW	0 mm	60%
11Mon	+21°C	+18°C	—	3-4 m/s, NW	0 mm	83%
12Tue	+20°C	+17°C	—	3-4 m/s, WNW	0.1 mm	83%
13Wed	+21°C	+16°C	—	3-4 m/s, E	0.1 mm	83%
14Thu	+20°C	+15°C	—	3-4 m/s, NNE	0 mm	75%
15Fri	+25°C	+16°C	—	4 m/s, SSE	0 mm	62%
16Sat	+24°C	+18°C	—	4-5 m/s, ENE	0 mm	65%
17Sun	+23°C	+17°C	—	3-4 m/s, SSE	0 mm	82%
18Mon	+21°C	+16°C	—	8-9 m/s, SW	4.7 mm	86%
19Tue	+20°C	+14°C	—	9-11 m/s, SW	0 mm	74%
20Wed	+23°C	+15°C	—	9-11 m/s, SSW	0 mm	72%
21Thu	+18°C	+14°C	—	6-10 m/s, SW	1.6 mm	79%
22Fri	+16°C	+11°C	—	7 m/s, W	2.4 mm	75%
23Sat	+15°C	+12°C	—	5-6 m/s, WNW	0.7 mm	70%
24Sun	+19°C	+11°C	—	6-7 m/s, S	0 mm	69%
25Mon	+19°C	+14°C	—	4-7 m/s, WSW	0 mm	70%
26Tue	+21°C	+16°C	—	4-5 m/s, SW	0.1 mm	78%
27Wed	+22°C	+16°C	—	4-6 m/s, SSE	0 mm	77%
28Thu	+19°C	+14°C	—	5-7 m/s, SW	0.2 mm	76%
29Fri	+19°C	+15°C	—	7-8 m/s, WNW	0.4 mm	77%
30Sat	+19°C	+12°C	—	3 m/s, S	0 mm	72%

Weather highs and lows in Dieppe for september

Warmest day: 9 september, +29°C
Coldest night: 22 september, +11°C
Max precipitation: 18 september, 4.7 mm
Warmest water: —
Coldest water: —

Climate in Dieppe in september

Year: 2023
Average daytime temperature: +22°C
Average nighttime temperature: +16°C
Water temperature: —
Precipitation (month): 12.5 mm
Days with precipitation: 4
Humidity: 74%
Wind: 4 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Thu	+25°C	+18°C	—	5-6 m/s, E	0.1 mm	58%
2Fri	+23°C	+17°C	—	3-4 m/s, SSW	0.2 mm	72%
3Sat	+21°C	+16°C	—	3-4 m/s, WSW	0.6 mm	80%
4Sun	+25°C	+15°C	—	3-4 m/s, SSW	0 mm	66%
5Mon	+23°C	+18°C	—	4-6 m/s, SW	0.2 mm	62%
6Tue	+23°C	+16°C	—	5-6 m/s, WSW	0.4 mm	73%
7Wed	+23°C	+15°C	—	5-6 m/s, SW	1.3 mm	74%
8Thu	+20°C	+14°C	—	6 m/s, SW	0 mm	82%
9Fri	+18°C	+14°C	—	9-10 m/s, SW	1.5 mm	84%
10Sat	+19°C	+16°C	—	6-8 m/s, W	0.4 mm	83%
11Sun	+22°C	+14°C	—	2-3 m/s, SSE	0 mm	75%
12Mon	+27°C	+16°C	—	4-5 m/s, SE	0 mm	63%
13Tue	+22°C	+18°C	—	4-5 m/s, SE	1.3 mm	61%
14Wed	+20°C	+16°C	—	4-5 m/s, NE	0.2 mm	87%
15Thu	+19°C	+15°C	—	4 m/s, WNW	0 mm	79%
16Fri	+17°C	+13°C	—	5-7 m/s, N	0.6 mm	68%
17Sat	+15°C	+12°C	—	8 m/s, N	0.1 mm	67%
18Sun	+16°C	+12°C	—	6-8 m/s, NNW	0 mm	63%
19Mon	+17°C	+11°C	—	5-6 m/s, NNW	0.1 mm	60%
20Tue	+17°C	+11°C	—	3-6 m/s, N	0 mm	66%
21Wed	+18°C	+11°C	—	3-4 m/s, NE	0 mm	74%
22Thu	+20°C	+10°C	—	2-3 m/s, E	0 mm	56%
23Fri	+19°C	+12°C	—	2-3 m/s, SE	1.2 mm	50%
24Sat	+14°C	+13°C	—	5-7 m/s, NNW	1.7 mm	89%
25Sun	+17°C	+13°C	—	6 m/s, NE	0 mm	80%
26Mon	+15°C	+12°C	—	7-10 m/s, SW	3.8 mm	75%
27Tue	+15°C	+12°C	—	8 m/s, WNW	1.2 mm	67%
28Wed	+14°C	+11°C	—	6-7 m/s, NW	0.4 mm	64%
29Thu	+15°C	+10°C	—	4 m/s, NNW	0.1 mm	70%
30Fri	+16°C	+8°C	—	4-7 m/s, NW	0.1 mm	70%

Weather highs and lows in Dieppe for september

Warmest day: 12 september, +27°C
Coldest night: 30 september, +8°C
Max precipitation: 26 september, 3.8 mm
Warmest water: —
Coldest water: —

Climate in Dieppe in september

Year: 2022
Average daytime temperature: +19°C
Average nighttime temperature: +14°C
Water temperature: —
Precipitation (month): 15.5 mm
Days with precipitation: 7
Humidity: 71%
Wind: 5 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Wed	+21°C	+12°C	—	6 m/s, NE	0 mm	78%
2Thu	+22°C	+12°C	—	6-7 m/s, NE	0 mm	78%
3Fri	+22°C	+13°C	—	5-6 m/s, NE	0 mm	80%
4Sat	+23°C	+14°C	—	4-5 m/s, NE	0 mm	80%
5Sun	+24°C	+17°C	—	3-5 m/s, E	0.1 mm	80%
6Mon	+25°C	+16°C	—	3-4 m/s, NE	0 mm	77%
7Tue	+26°C	+16°C	—	4-5 m/s, E	0 mm	74%
8Wed	+26°C	+17°C	—	4-5 m/s, E	0 mm	67%
9Thu	+22°C	+16°C	—	3 m/s, WSW	0.1 mm	86%
10Fri	+20°C	+15°C	—	4-5 m/s, WSW	0.1 mm	90%
11Sat	+19°C	+14°C	—	5-6 m/s, W	0 mm	77%
12Sun	+19°C	+13°C	—	2-3 m/s, N	0.2 mm	78%
13Mon	+22°C	+13°C	—	3-4 m/s, ENE	0 mm	74%
14Tue	+21°C	+15°C	—	3 m/s, NE	3.2 mm	81%
15Wed	+18°C	+13°C	—	3-4 m/s, NW	0 mm	89%
16Thu	+18°C	+12°C	—	2 m/s, WNW	0.1 mm	84%
17Fri	+20°C	+13°C	—	2-3 m/s, S	0 mm	76%
18Sat	+19°C	+14°C	—	3-4 m/s, W	0 mm	81%
19Sun	+18°C	+14°C	—	2-4 m/s, NW	0.2 mm	83%
20Mon	+17°C	+13°C	—	4-6 m/s, N	1.1 mm	89%
21Tue	+17°C	+11°C	—	3 m/s, NNE	0 mm	78%
22Wed	+19°C	+10°C	—	2 m/s, NE	0 mm	73%
23Thu	+18°C	+10°C	—	4-5 m/s, W	0 mm	80%
24Fri	+18°C	+12°C	—	3-4 m/s, W	0.2 mm	89%
25Sat	+20°C	+11°C	—	2-3 m/s, ENE	0 mm	73%
26Sun	+19°C	+13°C	—	4 m/s, SW	0.2 mm	78%
27Mon	+16°C	+12°C	—	7-9 m/s, W	0.3 mm	79%
28Tue	+17°C	+10°C	—	4-5 m/s, S	0 mm	72%
29Wed	+14°C	+9°C	—	7-8 m/s, W	1.2 mm	76%
30Thu	+16°C	+8°C	—	6-8 m/s, SW	0 mm	74%

Weather highs and lows in Dieppe for september

Warmest day: 7 september, +26°C
Coldest night: 30 september, +8°C
Max precipitation: 14 september, 3.2 mm
Warmest water: —
Coldest water: —

Climate in Dieppe in september

Year: 2021
Average daytime temperature: +20°C
Average nighttime temperature: +13°C
Water temperature: —
Precipitation (month): 7 mm
Days with precipitation: 3
Humidity: 79%
Wind: 4 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Tue	+17°C	+11°C	—	2-3 m/s, NE	0.1 mm	71%
2Wed	+18°C	+11°C	—	2-3 m/s, WSW	0 mm	70%
3Thu	+21°C	+14°C	—	5-6 m/s, SW	0.5 mm	73%
4Fri	+18°C	+16°C	—	4-5 m/s, W	0 mm	87%
5Sat	+16°C	+14°C	—	5-6 m/s, WNW	0.3 mm	76%
6Sun	+16°C	+14°C	—	3-4 m/s, NW	0.1 mm	70%
7Mon	+18°C	+12°C	—	2-3 m/s, W	0 mm	78%
8Tue	+19°C	+14°C	—	4-5 m/s, W	0 mm	86%
9Wed	+19°C	+15°C	—	5-6 m/s, W	0 mm	90%
10Thu	+19°C	+16°C	—	4-5 m/s, NE	0.2 mm	82%
11Fri	+20°C	+14°C	—	2-4 m/s, NNW	0 mm	74%
12Sat	+18°C	+13°C	—	4-5 m/s, W	0 mm	79%
13Sun	+22°C	+13°C	—	2 m/s, WNW	0 mm	74%
14Mon	+27°C	+16°C	—	4 m/s, SE	0 mm	62%
15Tue	+26°C	+19°C	—	4-5 m/s, WSW	0 mm	61%
16Wed	+22°C	+17°C	—	3-5 m/s, SE	0 mm	84%
17Thu	+21°C	+15°C	—	8 m/s, NE	0 mm	73%
18Fri	+22°C	+13°C	—	6-7 m/s, ENE	0 mm	70%
19Sat	+23°C	+16°C	—	5-7 m/s, ESE	0 mm	78%
20Sun	+23°C	+17°C	—	4 m/s, ENE	0 mm	79%
21Mon	+21°C	+14°C	—	3 m/s, NE	0 mm	65%
22Tue	+21°C	+13°C	—	2-3 m/s, W	0 mm	67%
23Wed	+19°C	+14°C	—	6-7 m/s, SW	1 mm	81%
24Thu	+15°C	+10°C	—	9-10 m/s, SW	1.9 mm	82%
25Fri	+13°C	+9°C	—	9-11 m/s, NNW	1.1 mm	76%
26Sat	+12°C	+8°C	—	11-13 m/s, NW	0.4 mm	71%
27Sun	+14°C	+10°C	—	12 m/s, NNW	2 mm	82%
28Mon	+14°C	+12°C	—	7-8 m/s, NW	1.2 mm	86%
29Tue	+17°C	+13°C	—	5-6 m/s, W	0 mm	88%
30Wed	+18°C	+14°C	—	5-7 m/s, SSW	0.3 mm	81%

Weather highs and lows in Dieppe for september

Warmest day: 14 september, +27°C
Coldest night: 26 september, +8°C
Max precipitation: 27 september, 2 mm
Warmest water: —
Coldest water: —

Climate in Dieppe in september

Year: 2020
Average daytime temperature: +19°C
Average nighttime temperature: +14°C
Water temperature: —
Precipitation (month): 9.1 mm
Days with precipitation: 5
Humidity: 77%
Wind: 5 m/s

Weather in Dieppe in september by year

Year	Day	Night	Precipitation	Days with precipitation	Water
2025	+19°C	+13°C	7.4 mm	2	—
2024	+18°C	+14°C	24.1 mm	8	—
2023	+22°C	+16°C	12.5 mm	4	—
2022	+19°C	+14°C	15.5 mm	7	—
2021	+20°C	+13°C	7 mm	3	—
2020	+19°C	+14°C	9.1 mm	5	—

Comparison september in Dieppe with other months

Month	Day	Night	Days with precipitation	Sunny days
January	+8°C	+4°C	6	7
February	+9°C	+5°C	5	6
March	+11°C	+5°C	3	10
April	+13°C	+7°C	4	9
May	+15°C	+10°C	3	9
June	+19°C	+13°C	3	12
July	+20°C	+15°C	3	10
August	+21°C	+16°C	4	11
September	+19°C	+14°C	5	9
October	+16°C	+11°C	7	6
November	+12°C	+8°C	7	5
December	+9°C	+5°C	6	4