Chartres, Centre-Val de Loire climate

Cfb Oceanic / temperate

Chartres has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 78°F, while the coldest is January averaging around 35°F at night. Precipitation is fairly even year-round, totalling about 23 inches.

☀️ Summers

Warm

Highs near 78°F in July.

❄️ Winters

Chilly

Lows near 35°F in January.

🌧️ Rain

Moderate rainfall

About 23 in of rain a year.

Wettest in November

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Chartres climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	45	47	54	61	67	73	78	78	71	61	51	46
Avg temp (°F)	40	41	46	51	57	63	67	67	61	54	45	41
Avg low (°F)	35	34	38	41	47	53	56	56	50	46	39	35
Precipitation (in)	1.9	1.6	1.7	1.5	2.2	1.9	2.1	1.8	1.7	2.2	2.4	2.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	45	47	54	61	67	73
Avg temp (°F)	40	41	46	51	57	63
Avg low (°F)	35	34	38	41	47	53
Precipitation (in)	1.9	1.6	1.7	1.5	2.2	1.9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	78	78	71	61	51	46
Avg temp (°F)	67	67	61	54	45	41
Avg low (°F)	56	56	50	46	39	35
Precipitation (in)	2.1	1.8	1.7	2.2	2.4	2.3

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	72	70	68	67	70	67	63	63	61	68	72	71
Relative humidity (%)	93	89	83	79	78	76	73	72	76	85	91	94
Wind speed (mph)	8.3	8.1	7.5	6.6	6.3	6.0	5.9	5.7	6.1	7.0	7.2	8.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	72	70	68	67	70	67
Relative humidity (%)	93	89	83	79	78	76
Wind speed (mph)	8.3	8.1	7.5	6.6	6.3	6.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	63	63	61	68	72	71
Relative humidity (%)	73	72	76	85	91	94
Wind speed (mph)	5.9	5.7	6.1	7.0	7.2	8.0

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Chartres/champol, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →