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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 85°F, while the coldest is January averaging around 36°F at night. Around 41 inches of precipitation falls each year, peaking in November (5.4 inches) and easing off in July (2.0 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)San Marino climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 46 | 54 | 61 | 70 | 79 | 85 | 84 | 73 | 63 | 53 | 46 |
| Avg temp (°F) | 40 | 41 | 47 | 53 | 62 | 70 | 75 | 75 | 65 | 57 | 49 | 42 |
| Avg low (°F) | 36 | 37 | 41 | 47 | 54 | 62 | 66 | 66 | 58 | 52 | 44 | 38 |
| Precipitation (in) | 2.6 | 3.1 | 3.2 | 3.7 | 3.4 | 2.8 | 2.0 | 2.3 | 4.1 | 4.2 | 5.4 | 4.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 46 | 54 | 61 | 70 | 79 |
| Avg temp (°F) | 40 | 41 | 47 | 53 | 62 | 70 |
| Avg low (°F) | 36 | 37 | 41 | 47 | 54 | 62 |
| Precipitation (in) | 2.6 | 3.1 | 3.2 | 3.7 | 3.4 | 2.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 84 | 73 | 63 | 53 | 46 |
| Avg temp (°F) | 75 | 75 | 65 | 57 | 49 | 42 |
| Avg low (°F) | 66 | 66 | 58 | 52 | 44 | 38 |
| Precipitation (in) | 2.0 | 2.3 | 4.1 | 4.2 | 5.4 | 4.1 |
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 (mph) | 6.0 | 6.3 | 6.6 | 5.5 | 5.1 | 4.7 | 4.8 | 4.5 | 5.0 | 5.2 | 5.5 | 5.9 |
| 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 (mph) | 6.0 | 6.3 | 6.6 | 5.5 | 5.1 | 4.7 |
| 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 (mph) | 4.8 | 4.5 | 5.0 | 5.2 | 5.5 | 5.9 |
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.