Nantes climate

Name: Nantes
Address: FR

Nantes is warmest in August, with average highs of 24 °C, and coldest in February, when nights average 3.3 °C. December is the wettest month (83 mm) and July the driest (40 mm). Figures are 1991–2020 climate normals.

Across a full year Nantes averages 721 mm of rain, 33 days above 25 °C and 22 days below freezing.

France · population 325,070 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 24 °C
Coldest month February 3.3 °C
Driest month July 40 mm
Wettest month December 83 mm
Least cloud August 53 % cloud
Hottest on record August 37 °C
Coldest on record January -11 °C

What to expectNantes through the year

Nantes has a clear annual cycle: average daily highs run from 9.8 °C in February to 24 °C in August, a swing of 13 °C in mean temperature across the year.

Counted across a normal year, 33 days a year reach 25 °C, 5 of them reach 30 °C, 22 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in August.

Rain is strongly seasonal. December averages 83 mm against 40 mm in July — 2.1 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.9 °C	74 mm	72 %
February	9.8 °C	58 mm	66 %
March	12.5 °C	54 mm	64 %
April	15.1 °C	57 mm	62 %
May	18.4 °C	61 mm	63 %
June	21.7 °C	48 mm	59 %
July	23.7 °C	40 mm	54 %
August	24.0 °C	48 mm	53 %
September	21.3 °C	50 mm	55 %
October	16.9 °C	76 mm	66 %
November	12.3 °C	73 mm	70 %
December	9.4 °C	83 mm	70 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	8.9 °C	3.7 °C	6.3 °C	15.9 °C	-11.2 °C	0	0	7
February	9.8 °C	3.3 °C	6.4 °C	20.1 °C	-9.0 °C	0	0	6
March	12.5 °C	5.1 °C	8.7 °C	21.4 °C	-5.4 °C	0	0	2
April	15.1 °C	7.0 °C	11.0 °C	25.8 °C	-0.9 °C	0	0	0
May	18.4 °C	10.3 °C	14.4 °C	30.7 °C	2.8 °C	2	0	0
June	21.7 °C	13.3 °C	17.6 °C	36.2 °C	5.9 °C	6	1	0
July	23.7 °C	15.1 °C	19.5 °C	37.0 °C	9.6 °C	10	2	0
August	24.0 °C	15.2 °C	19.5 °C	37.3 °C	8.6 °C	10	2	0
September	21.3 °C	12.9 °C	16.9 °C	32.1 °C	5.1 °C	5	0	0
October	16.9 °C	10.4 °C	13.5 °C	27.8 °C	-0.4 °C	0	0	0
November	12.3 °C	6.7 °C	9.4 °C	19.5 °C	-5.0 °C	0	0	2
December	9.4 °C	4.2 °C	6.8 °C	17.5 °C	-9.3 °C	0	0	6

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	74 mm	11	8.9 h/day	72 %	86 %	22 km/h
February	58 mm	10	10 h/day	66 %	82 %	22 km/h
March	54 mm	10	12 h/day	64 %	79 %	21 km/h
April	57 mm	10	14 h/day	62 %	75 %	20 km/h
May	61 mm	11	15 h/day	63 %	74 %	19 km/h
June	48 mm	8	16 h/day	59 %	72 %	18 km/h
July	40 mm	7	16 h/day	54 %	71 %	18 km/h
August	48 mm	7	14 h/day	53 %	72 %	18 km/h
September	50 mm	7	13 h/day	55 %	73 %	18 km/h
October	76 mm	11	11 h/day	66 %	81 %	20 km/h
November	73 mm	11	9.4 h/day	70 %	85 %	21 km/h
December	83 mm	11	8.5 h/day	70 %	87 %	22 km/h

How Nantes compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Nantes	24 °C	3.3 °C	721 mm	33
Angers · France	24 °C	2.7 °C	666 mm	38
Rennes · France	23 °C	2.8 °C	703 mm	26
Saint Helier · Jersey	19 °C	6.2 °C	995 mm	1
Saint Peter Port · Guernsey	17 °C	7.1 °C	876 mm	0

Where Nantes ranks

Ranking	Position	Value
Places with the best weather in Europe in July	7thof 50	92/100
Places with the best weather in Europe in August	26thof 50	91/100
Places with the best weather in Europe in June	37thof 50	90/100

Planning a trip? See the best time to visit Nantes.

QuestionsCommon questions about Nantes’s climate

When is the best time to visit Nantes?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, August is the warmest month and July the driest. The month-by-month table above has the full picture.

How hot does Nantes get?

In August, the warmest month, daily highs average 24 °C. About 5 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average 3.3 °C in February, the coldest month. A normal year has 22 nights below freezing.

Which month is wettest in Nantes?

December, averaging 83 mm over 11 days with rain. The driest month is July with 40 mm. The year as a whole averages 721 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Nantes rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.