San Marino climate
San Marino (San Marino) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 12 °C53 °F, and about 770 mm30 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
San Marino climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 541 | 033 | 337 | 552.2 |
| Feb | 643 | 033 | 338 | 702.8 |
| Mar | 949 | 337 | 643 | 692.7 |
| Apr | 1356 | 643 | 1049 | 632.5 |
| May | 1864 | 1051 | 1457 | 692.7 |
| Jun | 2373 | 1559 | 1966 | 461.8 |
| Jul | 2679 | 1864 | 2272 | 381.5 |
| Aug | 2679 | 1864 | 2271 | 471.8 |
| Sep | 2169 | 1456 | 1763 | 793.1 |
| Oct | 1661 | 949 | 1355 | 793.1 |
| Nov | 1151 | 542 | 846 | 883.5 |
| Dec | 643 | 235 | 439 | 682.7 |
| Year | 2679 | 033 | 1253 | 77030 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 84% | 72% | 1.5 | 9:15 |
| Feb | 82% | 69% | 2.3 | 10:25 |
| Mar | 79% | 65% | 3.5 | 11:48 |
| Apr | 76% | 62% | 4.7 | 13:23 |
| May | 72% | 61% | 5.8 | 14:43 |
| Jun | 65% | 46% | 6.8 | 15:27 |
| Jul | 58% | 32% | 7.0 | 15:09 |
| Aug | 60% | 35% | 6.0 | 13:59 |
| Sep | 69% | 51% | 4.3 | 12:26 |
| Oct | 78% | 62% | 2.8 | 10:54 |
| Nov | 84% | 71% | 1.6 | 9:34 |
| Dec | 85% | 68% | 1.3 | 8:55 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of San Marino is like
The warmest month is July, with an average high of 26 °C79 °F and a low of 18 °C64 °F. The coldest is January, when highs average 5 °C41 °F and lows 0 °C33 °F. Seasons are strongly marked: the warmest month is on average 19.3 °C34.8 °F warmer than the coldest.
Annual precipitation is moderate at about 770 mm30 in. The wettest three-month stretch is September–November, which brings 32% of the annual total. The wettest month is November (88 mm3.5 in), the driest is July (38 mm1.5 in).
Relative humidity ranges from 58% in July to 85% in December. The clearest skies (lowest average cloud amount, 32%) are typical of July. Average wind speed near the ground ranges from 9 km/h (5 mph) in August to 12 km/h (8 mph) in February. Daylight lasts from about 8.9 hours in December to 15.5 hours in June.
Best time to visit San Marino
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 21 °C69 °F to 26 °C79 °F with 38 mm1.5 in to 79 mm3.1 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 5 °C41 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for San Marino
- Winter (December–February) — highs 541 to 6 °C43 °F, lows 033 to 2 °C35 °F, about 64 mm2.5 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 949 to 18 °C64 °F, lows 337 to 10 °C51 °F, about 67 mm2.6 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 2373 to 26 °C79 °F, lows 1559 to 18 °C64 °F, about 44 mm1.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
- Autumn (September–November) — highs 1151 to 21 °C69 °F, lows 542 to 14 °C56 °F, about 82 mm3.2 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How San Marino compares
Compared with Rimini, about 16 km to the northeast, San Marino is on average 4.4 °C7.9 °F cooler and receives a similar amount of precipitation. The difference is largest in January (4.4 °C7.9 °F cooler).
Places in other countries with the most similar temperature and rainfall pattern: Villeurbanne (France, Cfa), Sarajevo (Bosnia and Herzegovina, Cfb) and Zenica (Bosnia and Herzegovina, Cfa).
Nearby places
- Rimini 16 km · 16 °C61 °F · 770 mm30 in
- Forlì 45 km · 15 °C60 °F · 742 mm29 in
- Arezzo 70 km · 14 °C57 °F · 777 mm31 in
- Perugia 92 km · 13 °C56 °F · 801 mm32 in
- Florence 98 km · 15 °C59 °F · 736 mm29 in
- Bologna 108 km · 15 °C59 °F · 656 mm26 in
- Ferrara 120 km · 15 °C59 °F · 733 mm29 in
- Modena 145 km · 15 °C60 °F · 675 mm27 in
Frequently asked questions
What is the warmest month in San Marino?
July is the warmest month in San Marino, with an average high of 26 °C (79 °F) and an average low of 18 °C (64 °F).
What is the coldest month in San Marino?
January is the coldest month, with an average high of 5 °C (41 °F) and an average low of 0 °C (33 °F).
When does it rain the most in San Marino?
November is the wettest month with about 88 mm (3.5 in) of precipitation; July is the driest with about 38 mm (1.5 in).
What is the best time to visit San Marino?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 232 m, while San Marino lies at about 683 m. Temperatures on this page were therefore adjusted by −2.9 °C5.3 °F using the standard lapse rate of 6.5 °C per 1,000 m.