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San Marino Weather in May
San Marino in May averages 22°C (72°F) during the day and 13°C (55°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in San Marino in May
Historically, the month has about 13 days of rain, averaging 74 mm (2.9 in) in total. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in San Marino in May
If you're visiting San Marino in May, expect excellent temperatures with highs of 22°C (72°F) and overnight lows of 13°C (55°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in San Marino in May
Expect sunny days throughout the month, with an estimated 222 hours of sunshine. This makes it a pleasant time to visit San Marino.
Average water temperature in May
With water at 17°C (63°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August, September and October typically offer the best weather for San Marino.
San Marino Temperature in May
Min Temperature
13°C (55°F)
Max Temperature
22°C (72°F)
Water Temperature
17°C (63°F) *
Chance of Rain
42%
Precipitation
74 mm (2.9 in)
Rainy days
13 days
Humidity
76% *
Sunshine
222 hours *
Percentage Sunshine
51% *
* Data from: Rimini, Italy (17 KM, 10 Miles).
San Marino Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Marino - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Marino typically rise from around 20°C (68°F) at the start of May to approximately 24°C (75°F) by the end. Nights are cool, with lows typically ranging from 11°C (52°F) to 14°C (57°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for San Marino in May
Browse day-by-day weather records for San Marino spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Marino historical weather extremes in May
Based on 50 years of weather observations in San Marino between 1976 and 2026, these are the recorded extremes.
- The hottest May day on record in San Marino reached 32°C (90°F) (May 22, 2009).
- San Marino experienced its chilliest May day on May 10, 1984, reaching only 10°C (50°F).
- Nighttime temperatures dropped to 2°C (36°F) on May 1, 1976, marking the coldest May night on record.
Best Places in San Marino in May
Find out more about the weather in San Marino and which places have the best travel conditions in this month. See all of San Marino in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in San Marino in May
For San Marino in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Expect water temperatures of around 17°C (63°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in San Marino in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Barbeque8/10 -
Camping8/10 -
Outdoor sports9/10
San Marino 3-Day Forecast
More climate data for San Marino
Temperature Rainfall Sunshine Humidity Water Temp
See the full San Marino climate overview or explore weather in San Marino.
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Where to go in May - average daytime high across popular destinations.
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