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Best time to visit San Marino

May to June and August to October — the months averaging 18–27 °C by day. No other month of the twelve falls inside that band in San Marino.

  1. January: 8 °C by day, 1 °C at night, 70 mm of rain
  2. February: 9 °C by day, 1 °C at night, 75 mm of rain
  3. March: 12 °C by day, 4 °C at night, 70 mm of rain
  4. April: 15 °C by day, 7 °C at night, 72 mm of rain
  5. May: 20 °C by day, 11 °C at night, 82 mm of rain, recommended
  6. June: 25 °C by day, 15 °C at night, 50 mm of rain, recommended
  7. July: 28 °C by day, 18 °C at night, 40 mm of rain
  8. August: 27 °C by day, 18 °C at night, 57 mm of rain, recommended
  9. September: 22 °C by day, 14 °C at night, 83 mm of rain, recommended
  10. October: 18 °C by day, 10 °C at night, 95 mm of rain, recommended
  11. November: 12 °C by day, 6 °C at night, 100 mm of rain
  12. December: 9 °C by day, 2 °C at night, 86 mm of rain
Warmest
July, 28 °C
Coolest
January, 8 °C
Driest
July, 40 mm
Wettest
November, 100 mm

How this is worked out: a month qualifies when its mean daytime high falls between 18 °C and 27 °C. Where more than five qualify, the answer is the driest run of consecutive qualifying months; where none do, it is the driest three months in a row if the year is hot throughout, or the warmest three if it never gets there. The figures are the thirty-year monthly averages charted below, and they are averages, not a forecast — any single year can miss them by a wide margin.

San Marino

Long-term averages for San Marino: the mean daily high, the mean overnight low and the mean monthly rainfall across 30 years of ERA5 reanalysis data (1995–2024).

DayNight
051015202530°C0100mmJanFebMarAprMayJunJulAugSepOctNovDecJanuary: Day 8 °C, Night 1 °C, Rain 70 mm. February: Day 9 °C, Night 1 °C, Rain 75 mm. March: Day 12 °C, Night 4 °C, Rain 70 mm. April: Day 15 °C, Night 7 °C, Rain 72 mm. May: Day 20 °C, Night 11 °C, Rain 82 mm. June: Day 25 °C, Night 15 °C, Rain 50 mm. July: Day 28 °C, Night 18 °C, Rain 40 mm. August: Day 27 °C, Night 18 °C, Rain 57 mm. September: Day 22 °C, Night 14 °C, Rain 83 mm. October: Day 18 °C, Night 10 °C, Rain 95 mm. November: Day 12 °C, Night 6 °C, Rain 100 mm. December: Day 9 °C, Night 2 °C, Rain 86 mm
Show the monthly table
San Marino
MonthDay (°C)Night (°C)Rain (mm)
January8170
February9175
March12470
April15772
May201182
June251550
July281840
August271857
September221483
October181095
November126100
December9286

When to visit

San Marino's wet season is autumn, not winter - September, October and November take the most rain of the year. May, June and August to October are the months in the comfortable band.

Autumn is the wet season here, not winter

The Italian-summer picture most people carry into a trip to San Marino is half right. July and August are dry - 40 and 57 mm - and July, at 28 C, is the only month above the comfortable band. What surprises people is the other end: September, October and November take 83, 95 and 100 mm, the three wettest months of the year, and December still takes 86.

So the shape of the year is a dry, hot midsummer with the rain stacked either side of it and weighted heavily to the autumn. May, June and August to October average 18-27 C by day and are what this page picks; May and June, at 82 and 50 mm, are the drier half of that.

A ridge, not a plain

San Marino's historic centre stands on top of Monte Titano, above the plain it looks out over toward the Adriatic. That is the whole explanation for two things a visitor notices.

The first is that it is cooler and windier than the coast a short drive away - the same afternoon that is still and hot in Rimini can be moving air on the ridge. The second is cloud: a ridge standing above a plain catches low cloud that the plain never sees, so the view that is the reason to come can be inside the weather rather than above it. Autumn, the wet season, is when that is most likely.

If the view matters more than the temperature, the dry midsummer is the safer bet despite the 28 C.

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