SeasonMapSan Marino weather in May
San Marino
May in San Marino: nice, rainy — an excellent time to visit.
#5 of 12 months in San Marino · #658 of 1383 destinations to visit in May · comfort 82/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on San Marino in May
No notes yet. Open San Marino on the map to add the first one.
San Marino climate normals — May
| Daytime high | 18°C / 64°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 49°F | |
| Feels like (high) | 17°C / 63°F | |
| Sea temperature | 18°C / 65°F | 🧊 bracing |
| Rainfall | 86 mm / 3.4 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 9°C / 47°F | |
| Sunshine | 11.7 h/day | |
| Daylight | 14.8 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 52 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in San Marino in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 4 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for San Marino's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherSan Marino's weather peaks June–August.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of San Marino — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is San Marino?
San Marino in May — FAQ
- Is May a good time to visit San Marino?
- May in San Marino: nice, rainy — an excellent time to visit. It ranks #5 of 12 months for San Marino on SeasonMap's comfort score (82/100).
- What is the weather like in San Marino in May?
- In May, San Marino averages a daily high of 18°C and a low of 9.2°C, with about 86 mm of rain over roughly 11.8 rainy days.
- What is the air quality in San Marino in May?
- San Marino has a mean US Air Quality Index of about 52 in May.
Other months in San Marino
Compare San Marino in May
Warmer or cooler than San Marino in May
Similar destinations in Southern Europe — May
Within 300 km: Venice's Biennale on 9 May – 22 Nov, and Cinque Terre's Monterosso lemon festival around 15–25 May.