Best year time to visit Grignon

General weather information about Grignon

Average annual temperature is 13.6 °C

Absolute maximum temperature: 35.3 °C

Absolute minimum temperature: -3.9 °C

Number of sunny days: 145 days

Number of rainy days: 220 days

Look at detailed online map of Grignon

* Weather data for Grignon France is based on climate observations for 2026 year

Grignon air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	17.3	16.9	20.8	23.2	26.3	29.9	30.0	35.3	34.3	28.8	17.0	14.7
Average daytime temperature (°C)	8.4	10.3	12.8	15.3	20.3	26.2	24.3	25.1	25.5	19.8	12.5	10.4
Average temperature (°C)	6.1	6.1	9.0	11.2	15.7	21.2	19.6	20.4	20.4	15.4	9.7	7.7
Average night temperature (°C)	3.7	2.9	5.5	7.1	11.0	16.3	14.7	15.8	15.8	11.7	6.9	5.0
Absolute minimum temperature (°C)	-2.4	-3.9	-1.4	1.8	6.8	13.4	11.9	10.8	9.5	7.7	-0.9	-3.0

Grignon monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	11.0	12.0	14.0	15.0	15.0	15.0	14.0	13.0	11.0	10.0	8.0
Daylight mean duration (h)	9.1	10.3	11.9	13.6	15.0	15.8	15.4	14.1	12.6	10.9	9.4	8.7
Daylight minimum duration (h)	8.0	9.0	11.0	12.0	14.0	15.0	14.0	13.0	11.0	10.0	8.0	8.0
Sunshine mean duration (h)	3.7	6.3	6.8	8.7	12.1	11.9	11.9	10.3	10.1	7.0	4.6	3.9
Precipitation (mm)	146	30	176	72	31	95	55	45	74	172	179	177
Sunny days	10	21	11	10	14	15	10	11	15	14	5	9
Rainy days	21	7	20	20	17	15	21	20	15	17	25	22
Snow days	0	0	0	0	0	0	0	0	0	0	0	0

Grignon - weather forecast by months

Grignon weather in january Grignon weather in february Grignon weather in march Grignon weather in april Grignon weather in may Grignon weather in june Grignon weather in july Grignon weather in august Grignon weather in september Grignon weather in october Grignon weather in november Grignon weather in december

Best time to visit Grignon:

The best time to visit Grignon during the most sunny months:

May — 12.1(h)
June — 11.9(h)
July — 11.9(h)
August — 10.3(h)

Months with the longest average daylight duration in Grignon:

June — 15.8(h)
July — 15.4(h)

The largest precipitation sum in Grignon is at

January — 146(mm)

March — 176(mm)

October — 172(mm)

November — 179(mm)

December — 177(mm)

Weather forecast in the closest to Grignon admin centers