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Saint-Chamond, Auvergne-Rhône-Alpes climate
Cfb Oceanic / temperate
Saint-Chamond has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 81°F, while the coldest is January averaging around 32°F at night. Around 20 inches of precipitation falls each year, peaking in May (2.3 inches) and easing off in January (0.9 inches).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Saint-Chamond climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 48 | 56 | 62 | 69 | 76 | 81 | 81 | 72 | 63 | 53 | 47 |
| Avg temp (°F) | 39 | 40 | 46 | 51 | 58 | 65 | 69 | 69 | 61 | 55 | 46 | 40 |
| Avg low (°F) | 32 | 32 | 36 | 40 | 47 | 54 | 58 | 57 | 51 | 46 | 38 | 34 |
| Precipitation (in) | 0.9 | 1.1 | 0.9 | 1.6 | 2.3 | 2.1 | 2.1 | 1.8 | 1.7 | 1.7 | 2.1 | 1.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 48 | 56 | 62 | 69 | 76 |
| Avg temp (°F) | 39 | 40 | 46 | 51 | 58 | 65 |
| Avg low (°F) | 32 | 32 | 36 | 40 | 47 | 54 |
| Precipitation (in) | 0.9 | 1.1 | 0.9 | 1.6 | 2.3 | 2.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 81 | 81 | 72 | 63 | 53 | 47 |
| Avg temp (°F) | 69 | 69 | 61 | 55 | 46 | 40 |
| Avg low (°F) | 58 | 57 | 51 | 46 | 38 | 34 |
| Precipitation (in) | 2.1 | 1.8 | 1.7 | 1.7 | 2.1 | 1.2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 64 | 62 | 63 | 66 | 58 | 50 | 51 | 55 | 65 | 70 | 68 |
| Relative humidity (%) | 91 | 87 | 82 | 78 | 75 | 69 | 62 | 60 | 69 | 82 | 89 | 91 |
| Wind speed (mph) | 5.5 | 5.8 | 5.8 | 5.7 | 5.4 | 4.9 | 4.8 | 4.5 | 4.7 | 5.1 | 5.3 | 5.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 64 | 62 | 63 | 66 | 58 |
| Relative humidity (%) | 91 | 87 | 82 | 78 | 75 | 69 |
| Wind speed (mph) | 5.5 | 5.8 | 5.8 | 5.7 | 5.4 | 4.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 51 | 55 | 65 | 70 | 68 |
| Relative humidity (%) | 62 | 60 | 69 | 82 | 89 | 91 |
| Wind speed (mph) | 4.8 | 4.5 | 4.7 | 5.1 | 5.3 | 5.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Boutheon / Saint Etienne Loire, a weather station, about 18 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.