This page is a single place to check Nantes climate: monthly averages. Nantes runs from 5.2 C in Jan to 19.1 C in Jul, a swing of 13.9 C. Rain is spread through the year, with Dec the wettest month at 2.95 mm/day and Sep the driest at 1.50 mm/day. Taken together that is roughly 798 mm of rain a year for the grid cell. The build runs on a schedule and caches the last good response, so the numbers stay put even when the upstream API is having a bad day. Use the table for exact numbers, or the related pages below for neighbouring locations and periods.
Annual mean temperature 11.8 C
Warmest month Jul (19.1 C)
Coldest month Jan (5.2 C)
Wettest month Dec (2.95 mm/day)
All-time record high 37.3 C
All-time record low -11.2 C
Annual precipitation 799 mm / year
Coordinates 47.21725, -1.55336
Population 325,070
Average monthly temperature and rainfall in Nantes
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
5.2
2.72
15.0
-9.8
Feb
5.3
2.30
20.4
-11.2
Mar
7.8
2.21
22.2
-5.9
Apr
10.7
1.80
26.5
-3.9
May
13.9
2.08
29.8
0.6
Jun
17.4
1.74
34.6
3.6
Jul
19.1
1.68
37.3
7.9
Aug
18.8
1.67
34.8
7.7
Sep
16.2
1.50
31.3
3.2
Oct
12.8
2.69
27.9
-2.2
Nov
8.7
2.92
20.8
-4.8
Dec
5.5
2.95
15.9
-7.4
What the Nantes climate table shows
Values are multi-decadal climatological averages for the 47.21725, -1.55336 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Is Nantes climate data a forecast?
No. These are multi-decadal averages for the grid cell, not a prediction for any particular year.
Why do the numbers differ from a weather app?
An app shows one location on one day. These are long-run averages, so they smooth out single hot or cold spells.