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Saint-Nazaire, Pays de la Loire climate
Cfb Oceanic / temperate
Saint-Nazaire has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 25°C, while the coldest is January averaging around 3°C at night. Around 823 mm of precipitation falls each year, peaking in December (101 mm) and easing off in July (44 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsSaint-Nazaire climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 13 | 16 | 20 | 23 | 25 | 25 | 22 | 18 | 13 | 10 |
| Avg temp (°C) | 6 | 7 | 9 | 11 | 15 | 18 | 20 | 20 | 17 | 14 | 9 | 7 |
| Avg low (°C) | 3 | 3 | 5 | 7 | 10 | 13 | 14 | 14 | 12 | 9 | 6 | 4 |
| Precipitation (mm) | 88 | 68 | 59 | 58 | 61 | 49 | 44 | 51 | 60 | 89 | 94 | 101 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 13 | 16 | 20 | 23 |
| Avg temp (°C) | 6 | 7 | 9 | 11 | 15 | 18 |
| Avg low (°C) | 3 | 3 | 5 | 7 | 10 | 13 |
| Precipitation (mm) | 88 | 68 | 59 | 58 | 61 | 49 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 25 | 22 | 18 | 13 | 10 |
| Avg temp (°C) | 20 | 20 | 17 | 14 | 9 | 7 |
| Avg low (°C) | 14 | 14 | 12 | 9 | 6 | 4 |
| Precipitation (mm) | 44 | 51 | 60 | 89 | 94 | 101 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 18 | 15 | 14 | 14 | 15 | 13 | 13 | 13 | 14 | 19 | 20 | 19 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.0 | 0.8 | 2 | 2 | 0.3 | — | — | — |
| Days with low ≤ 0°C (days) | 8 | 8 | 3 | 0.9 | 0.0 | — | — | — | — | 0.4 | 3 | 8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 18 | 15 | 14 | 14 | 15 | 13 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.0 | 0.8 |
| Days with low ≤ 0°C (days) | 8 | 8 | 3 | 0.9 | 0.0 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 13 | 13 | 14 | 19 | 20 | 19 |
| Days with high ≥ 32°C (days) | 2 | 2 | 0.3 | — | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.4 | 3 | 8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 67 | 66 | 66 | 68 | 64 | 60 | 59 | 58 | 67 | 70 | 70 |
| Clear days (≤ 30% cloud) | 3 | 4 | 5 | 5 | 4 | 5 | 5 | 6 | 6 | 3 | 3 | 3 |
| Partly cloudy days (30–70%) | 9 | 9 | 9 | 9 | 9 | 10 | 12 | 12 | 11 | 11 | 9 | 10 |
| Cloudy days (≥ 70%) | 19 | 16 | 17 | 17 | 18 | 15 | 14 | 14 | 12 | 17 | 18 | 18 |
| Relative humidity (%) | 91 | 87 | 84 | 81 | 79 | 77 | 75 | 75 | 77 | 84 | 88 | 91 |
| Wind speed (km/h) | 14.2 | 13.7 | 12.9 | 12.2 | 11.6 | 11.2 | 10.9 | 10.6 | 11.2 | 12.6 | 13.3 | 14.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 67 | 66 | 66 | 68 | 64 |
| Clear days (≤ 30% cloud) | 3 | 4 | 5 | 5 | 4 | 5 |
| Partly cloudy days (30–70%) | 9 | 9 | 9 | 9 | 9 | 10 |
| Cloudy days (≥ 70%) | 19 | 16 | 17 | 17 | 18 | 15 |
| Relative humidity (%) | 91 | 87 | 84 | 81 | 79 | 77 |
| Wind speed (km/h) | 14.2 | 13.7 | 12.9 | 12.2 | 11.6 | 11.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 59 | 58 | 67 | 70 | 70 |
| Clear days (≤ 30% cloud) | 5 | 6 | 6 | 3 | 3 | 3 |
| Partly cloudy days (30–70%) | 12 | 12 | 11 | 11 | 9 | 10 |
| Cloudy days (≥ 70%) | 14 | 14 | 12 | 17 | 18 | 18 |
| Relative humidity (%) | 75 | 75 | 77 | 84 | 88 | 91 |
| Wind speed (km/h) | 10.9 | 10.6 | 11.2 | 12.6 | 13.3 | 14.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Nantes-bouguenais, a weather station, about 48 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.