Weather in Seine-Maritime

Calculated from weather data of Rouen Vallée de Seine Airport (LFOP) between 2020 and 2024.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	6.8	6.2	7.5	6.7	6.2	8.4
February	9.3	10.8	9.0	9.8	9.0	10.6
March	11.9	12.3	11.3	12.9	12.1	11.5
April	15.0	14.0	13.0	14.4	13.0	19.5
May	18.4		17.8	19.3	16.3	19.8
June	23.0		24.6	23.0	22.1	21.8
July	24.6		22.8	26.1	22.6	23.6
August	23.9		22.6	26.6	21.0	25.6
September	21.0		23.8	19.3	22.1	21.8
October	16.5		17.8	17.6	15.8	14.5
November	10.6		10.9	11.0	9.9	12.4
December	7.9		9.1	3.1	8.5	8.3
Average	15.1	10.8	15.9	16.3	14.9	16.4

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	1.8	1	3	2	1	3
February	2.9	6	2	4	2	4
March	4.0	5	5	4	2	3
April	5.2	6	5	5	2	7
May	8.1		8	9	7	8
June	11.9		13	12	12	11
July	13.4		14	14	14	12
August	13.4		14	15	13	14
September	11.0		14	11	12	11
October	8.6		9	11	7	8
November	4.8		6	6	3	6
December	3.2		5	-1	4	4
Average	6.9	4.6	8.2	7.9	6.5	7.4

30th lowest temperature of France

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
30 °C or warmer	0	7	13	1	14
25 °C or warmer	0	41	46	20	32
20 °C or warmer	2	109	109	83	116
0 °C or colder	15	21	22	34	10

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	33.7	21	41	27	40	35
February	31.0	57	12	39	22	51
March	32.2	34	44	21	27	30
April	19.3	34	29	19	17	3
May	18.4		14	15	41	5
June	15.7		5	19	21	28
July	14.4		24	1	29	13
August	20.3		15	11	32	27
September	21.2		11	34	12	16
October	26.3		24	20	30	44
November	39.9		68	41	32	21
December	39.5		37	11	32	59
Average	25.4	36.3	24.5	20.0	27.5	25.1

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (km/h)

Month	Average	2024	2023	2022	2021	2020
January	16.4	18	22	15	15	17
February	19.2	22	16	23	17	26
March	18.5	18	23	18	17	20
April	15.8	19	17	19	15	14
May	14.9		18	14	18	15
June	13.1		15	14	11	14
July	13.9		17	14	13	15
August	13.6		15	15	12	14
September	14.0		13	14	13	14
October	16.9		17	17	17	19
November	16.8		22	20	14	15
December	17.7		21	13	18	18
Average	15.9	19.2	17.6	15.9	14.6	16.3

29th highest wind speed of France

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	SW	SW	SW	SW	S
February	SW	N	SW	SE	SW
March	S	SW	E	W	NE
April	SW	N	N	NE	E
May		N	NW	W	NE
June		NE	SW	N	SW
July		SW	NW	W	W
August		W	N	NW	SW
September		S	SW	SE	NW
October		S	S	S	SW
November		SW	S	W	S
December		SW	E	SW	S

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Seine-Maritime weather Q&A

What is the warmest month in Seine-Maritime?

The warmest month is July with an average temperature of 25 °C over the past years.

What is the coldest month in Seine-Maritime?

The coldest month is January with an average daytime temperature of 7 °C in the past few years.

Which month is the wettest in Seine-Maritime?

Chance of precipitation is the highest in November with a probability of around 39.9 %.

Which month is the driest in Seine-Maritime?

The least rainfall and snow can be expected in July. The probability is about 14.4 %.