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Roanne, Auvergne-Rhône-Alpes climate
Cfb Oceanic / temperate
Roanne has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 27°C, while the coldest is January averaging around 0°C at night. Around 498 mm of precipitation falls each year, peaking in May (60 mm) and easing off in January (22 mm).
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)Roanne climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 9 | 13 | 16 | 20 | 25 | 27 | 27 | 22 | 17 | 11 | 8 |
| Avg temp (°C) | 4 | 4 | 8 | 11 | 14 | 18 | 21 | 20 | 16 | 13 | 8 | 5 |
| Avg low (°C) | 0 | 0 | 2 | 5 | 9 | 12 | 14 | 14 | 10 | 8 | 4 | 1 |
| Precipitation (mm) | 22 | 27 | 24 | 41 | 60 | 53 | 53 | 47 | 43 | 44 | 54 | 32 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 9 | 13 | 16 | 20 | 25 |
| Avg temp (°C) | 4 | 4 | 8 | 11 | 14 | 18 |
| Avg low (°C) | 0 | 0 | 2 | 5 | 9 | 12 |
| Precipitation (mm) | 22 | 27 | 24 | 41 | 60 | 53 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 22 | 17 | 11 | 8 |
| Avg temp (°C) | 21 | 20 | 16 | 13 | 8 | 5 |
| Avg low (°C) | 14 | 14 | 10 | 8 | 4 | 1 |
| Precipitation (mm) | 53 | 47 | 43 | 44 | 54 | 32 |
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 58 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.