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 23°C, while the coldest is January averaging around 3°C at night. Around 869 mm of precipitation falls each year, peaking in December (103 mm) and easing off in June (47 mm).

☀️ Summers

Mild

Highs near 23°C in July.

❄️ Winters

Chilly

Lows near 3°C in January.

🌧️ Rain

Moderate rainfall

About 869 mm 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 (°C)	10	11	13	15	18	21	23	23	21	17	13	11
Avg temp (°C)	7	7	9	11	14	16	18	18	16	13	10	7
Avg low (°C)	3	3	5	6	9	11	13	13	11	9	6	4
Precipitation (mm)	101	79	64	58	66	47	52	50	53	95	99	103

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	10	11	13	15	18	21
Avg temp (°C)	7	7	9	11	14	16
Avg low (°C)	3	3	5	6	9	11
Precipitation (mm)	101	79	64	58	66	47

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	23	23	21	17	13	11
Avg temp (°C)	18	18	16	13	10	7
Avg low (°C)	13	13	11	9	6	4
Precipitation (mm)	52	50	53	95	99	103

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 (km/h)	14.0	13.7	13.2	12.6	11.9	11.2	11.2	10.8	11.2	12.3	12.9	13.8

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 (km/h)	14.0	13.7	13.2	12.6	11.9	11.2

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 (km/h)	11.2	10.8	11.2	12.3	12.9	13.8

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 →