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San Marino, San Marino climate
Cfa Humid subtropical
San Marino has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 29°C, while the coldest is January averaging around 2°C at night. Around 1037 mm of precipitation falls each year, peaking in November (138 mm) and easing off in July (51 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)San Marino climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 12 | 16 | 21 | 26 | 29 | 29 | 23 | 17 | 12 | 8 |
| Avg temp (°C) | 5 | 5 | 8 | 12 | 17 | 21 | 24 | 24 | 18 | 14 | 9 | 6 |
| Avg low (°C) | 2 | 3 | 5 | 8 | 12 | 17 | 19 | 19 | 15 | 11 | 7 | 3 |
| Precipitation (mm) | 65 | 78 | 82 | 93 | 86 | 70 | 51 | 57 | 103 | 108 | 138 | 104 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 12 | 16 | 21 | 26 |
| Avg temp (°C) | 5 | 5 | 8 | 12 | 17 | 21 |
| Avg low (°C) | 2 | 3 | 5 | 8 | 12 | 17 |
| Precipitation (mm) | 65 | 78 | 82 | 93 | 86 | 70 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 23 | 17 | 12 | 8 |
| Avg temp (°C) | 24 | 24 | 18 | 14 | 9 | 6 |
| Avg low (°C) | 19 | 19 | 15 | 11 | 7 | 3 |
| Precipitation (mm) | 51 | 57 | 103 | 108 | 138 | 104 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 63 | 62 | 63 | 60 | 48 | 34 | 37 | 53 | 63 | 70 | 67 |
| Relative humidity (%) | 90 | 86 | 82 | 78 | 74 | 65 | 55 | 57 | 70 | 81 | 89 | 91 |
| Wind speed (m/s) | 2.7 | 2.8 | 2.9 | 2.5 | 2.3 | 2.1 | 2.2 | 2.0 | 2.2 | 2.3 | 2.5 | 2.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 63 | 62 | 63 | 60 | 48 |
| Relative humidity (%) | 90 | 86 | 82 | 78 | 74 | 65 |
| Wind speed (m/s) | 2.7 | 2.8 | 2.9 | 2.5 | 2.3 | 2.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 34 | 37 | 53 | 63 | 70 | 67 |
| Relative humidity (%) | 55 | 57 | 70 | 81 | 89 | 91 |
| Wind speed (m/s) | 2.2 | 2.0 | 2.2 | 2.3 | 2.5 | 2.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Frontone, about 52 km from the city centre.
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.