Lorient, Brittany climate

Cfb Oceanic / temperate

Lorient has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 73°F, while the coldest is January averaging around 38°F at night. Around 34 inches of precipitation falls each year, peaking in December (4.1 inches) and easing off in June (1.9 inches).

☀️ Summers

Mild

Highs near 73°F in July.

❄️ Winters

Chilly

Lows near 38°F in January.

🌧️ Rain

Moderate rainfall

About 34 in of rain a year.

Wettest in December

⛅ 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)

Lorient climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	50	51	55	59	65	70	73	73	70	63	56	51
Avg temp (°F)	44	44	48	51	56	61	64	64	61	55	49	45
Avg low (°F)	38	38	40	43	48	53	56	55	52	48	43	39
Precipitation (in)	4.0	3.1	2.5	2.3	2.6	1.9	2.0	2.0	2.1	3.8	3.9	4.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	50	51	55	59	65	70
Avg temp (°F)	44	44	48	51	56	61
Avg low (°F)	38	38	40	43	48	53
Precipitation (in)	4.0	3.1	2.5	2.3	2.6	1.9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	73	73	70	63	56	51
Avg temp (°F)	64	64	61	55	49	45
Avg low (°F)	56	55	52	48	43	39
Precipitation (in)	2.0	2.0	2.1	3.8	3.9	4.1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	74	70	67	62	63	59	57	57	55	67	71	73
Relative humidity (%)	92	90	88	84	82	80	76	75	78	85	90	92
Wind speed (mph)	8.7	8.5	8.2	7.8	7.4	7.0	6.9	6.7	7.0	7.7	8.0	8.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	74	70	67	62	63	59
Relative humidity (%)	92	90	88	84	82	80
Wind speed (mph)	8.7	8.5	8.2	7.8	7.4	7.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	57	55	67	71	73
Relative humidity (%)	76	75	78	85	90	92
Wind speed (mph)	6.9	6.7	7.0	7.7	8.0	8.6

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Lorient Lann Bihoue, a weather station, about 5 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 →