Weather by month for Helsinki, the best months to go and how Finland's regions differ, scored from 10 years of climate data.
Jun
The highest month scores: comfortable temperatures, little rain and plenty of sun.
Highs 19°C · 10 rain days
May, Jul, Aug
Still good weather, just not quite the top months.
Highs 14°C to 21°C · 9–13 rain days
Jan, Feb, Mar, Apr, Oct, Nov, Dec
The weakest weather of the year: too hot, too cold or too wet.
Highs -1°C to 9°C · 10–15 rain days
Weather by month
Average highs and lows, rain days, sunshine, sea temperature and our month score out of 10.
| Month | High / low | Rain days | Sunshine | Sea temp | Score |
|---|---|---|---|---|---|
| January | -1°C / -6°C | 14 days (68 mm) | 1.4 h/day | 0°C | 0.7/10 |
| February | -1°C / -5°C | 12 days (63 mm) | 3.6 h/day | 0°C | 1.7/10 |
| March | 2°C / -4°C | 11 days (45 mm) | 6.6 h/day | 1°C | 2.6/10 |
| April | 7°C / 0°C | 10 days (45 mm) | 9.9 h/day | 4°C | 3.1/10 |
| May | 14°C / 6°C | 9 days (48 mm) | 13.0 h/day | 10°C | 6.0/10 |
| Best month: June | 19°C / 11°C | 10 days (57 mm) | 14.7 h/day | 16°C | 7.7/10 |
| July | 21°C / 14°C | 13 days (79 mm) | 13.3 h/day | 19°C | 7.1/10 |
| August | 20°C / 14°C | 13 days (83 mm) | 11.2 h/day | 20°C | 7.1/10 |
| September | 15°C / 10°C | 11 days (70 mm) | 8.2 h/day | 17°C | 5.6/10 |
| October | 9°C / 5°C | 13 days (80 mm) | 4.8 h/day | 11°C | 1.8/10 |
| November | 4°C / 1°C | 15 days (78 mm) | 2.0 h/day | 6°C | 0.7/10 |
| December | 1°C / -2°C | 14 days (67 mm) | 1.3 h/day | 2°C | 0.5/10 |
Figures for Helsinki; the country's best months are weighted across its cities. Best months are highlighted. How we score months
Month by month
-1°C / -6°C · 14 rain days · 1.4 h sun · sea 0°C
Daytime highs sit at -1.2°C, with lows near -5.9°C, and just 1.4 hours of sun a day. Rain or snow falls on about 14 days. The score is 0.7, a low point for the year, but it's the month for proper winter scenes, snow cover and dark skies. New Year's Day and Epiphany fall here.
-1°C / -5°C · 12 rain days · 3.6 h sun · sea 0°C
Highs reach -0.5°C and sun hours rise slightly to 3.6. Rain days drop to about 12. The score is still low at 1.7, but this is peak season for crisp, cold, snowy days if that's what you're after.
2°C / -4°C · 11 rain days · 6.6 h sun · sea 1°C
Highs climb to 1.9°C and lows stay below freezing at -3.7°C. Sun hours nearly double to 6.6 and rain days fall to about 11. The score of 2.6 shows winter is loosening its grip but conditions are still cold and often icy.
7°C / 0°C · 10 rain days · 9.9 h sun · sea 4°C
Highs reach 7.1°C and lows finally climb above freezing to 0.2°C. Rain days drop to about 10, and sun hours jump to 9.9. The score is 3.1, still on the cool side, but Easter weekend lands in early April this year.
14°C / 6°C · 9 rain days · 13.0 h sun · sea 10°C
Highs hit 13.7°C and sun hours reach 13 a day, with rain down to about 9 days. The score rises to 6, marking the start of good conditions. May Day, Ascension Day and Pentecost all fall in this month.
19°C / 11°C · 10 rain days · 14.7 h sun · sea 16°C
This is the top month, scoring 7.7. Highs reach 18.7°C, sea temperature climbs to 16.1°C, and sun hours peak at 14.7 a day. Rain picks up slightly to about 10 days. Midsummer Eve and Midsummer Day bring long light nights and local celebrations.
21°C / 14°C · 13 rain days · 13.3 h sun · sea 19°C
The warmest month, with highs of 20.5°C and sea temperature at 18.6°C, good for swimming. Rain days rise to 13 and rainfall totals 79mm, the heaviest stretch of summer. The score stays strong at 7.1.
20°C / 14°C · 13 rain days · 11.2 h sun · sea 20°C
Highs stay warm at 19.9°C and sea temperature peaks at 19.5°C. Rain days are similar to July at about 13, with 83mm of rainfall, the wettest month on record here. The score holds at 7.1 despite the rain.
15°C / 10°C · 11 rain days · 8.2 h sun · sea 17°C
Highs drop to 15.4°C and sun hours fall to 8.2 as days shorten. Rain days ease slightly to about 11. The score of 5.6 reflects a milder, still decent month before autumn weather sets in.
9°C / 5°C · 13 rain days · 4.8 h sun · sea 11°C
Highs fall to 9.1°C and rain returns heavily, with about 13 rain days and 80mm of rainfall. Sun hours drop sharply to 4.8. The score falls to 1.8, reflecting cooler, wetter, greyer conditions. All Saints' Day falls at month's end.
4°C / 1°C · 15 rain days · 2.0 h sun · sea 6°C
Highs reach only 4.4°C and sun hours drop to just 2 a day, among the darkest of the year. Rain days climb back to about 15. The score is 0.7, matching January, as daylight and warmth both fade fast.
1°C / -2°C · 14 rain days · 1.3 h sun · sea 2°C
Highs sit at 1.2°C and sun hours bottom out at 1.3, the lowest of the year. Rain or snow falls on about 14 days. The score of 0.5 is the year's lowest, but this is the month for Christmas markets, Independence Day on the 6th, and Christmas and St. Stephen's Day celebrations.
Regional differences
Average daytime high each month, coloured by that city's own month score.
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Helsinki | -1°C | -1°C | 2°C | 7°C | 14°C | 19°C | 21°C | 20°C | 15°C | 9°C | 4°C | 1°C |
| Tampere | -3°C | -2°C | 2°C | 8°C | 15°C | 20°C | 21°C | 20°C | 15°C | 8°C | 3°C | 0°C |
| Turku | -1°C | 0°C | 3°C | 9°C | 16°C | 20°C | 21°C | 21°C | 16°C | 9°C | 5°C | 1°C |
| Rovaniemi | -7°C | -6°C | -2°C | 4°C | 11°C | 17°C | 20°C | 18°C | 12°C | 4°C | -1°C | -4°C |
| Kuusamo | -8°C | -6°C | -2°C | 3°C | 10°C | 16°C | 19°C | 17°C | 11°C | 3°C | -2°C | -5°C |
Best Good OK Tough weather
By trip type
City sightseeing
June is the best month for city trips in Helsinki. Daytime highs reach 18.7°C, there are 14.7 hours of sunshine a day, and rain falls on fewer days than in July or August, making it comfortable for walking around.
Beach
July and August suit beach time best. Sea temperatures hit 18.6°C in July and peak at 19.5°C in August, with highs of 19.9 to 20.5°C, though both months bring more rain days, 13.1 and 12.7, than June.
Hiking & nature
May and June work well for hiking. May has only 8.7 rain days and highs of 13.7°C, while June adds more sunshine, 14.7 hours a day, and warmer highs of 18.7°C for longer trail days.
Events calendar
Public holidays: New Year's Day (1 Jan), Epiphany (6 Jan)
Public holidays: Good Friday (3 Apr), Easter Sunday (5 Apr), Easter Monday (6 Apr)
Public holidays: May Day (1 May), Ascension Day (14 May), Pentecost (24 May)
Public holidays: Midsummer Eve (19 Jun), Midsummer Day (20 Jun)
Public holidays: All Saints' Day (31 Oct)
Public holidays: Independence Day (6 Dec), Christmas Eve (24 Dec), Christmas Day (25 Dec), St. Stephen's Day (26 Dec)
Keep planning
FAQ
Yes, June is the best month to visit, with a score of 7.7 out of 10. Daytime highs average 18.7°C and nights stay mild at 11.4°C. Sea temperatures reach 16.1°C, sunshine hours peak at 14.7, and rain falls on about 10 days, making it the most balanced month of the year.
Yes, August rates 7.1 out of 10, a good month. Highs average 19.9°C and sea temperature hits its warmest point of the year at 19.5°C, good for swimming. Rain is more frequent than June, with 12.7 rain days and 83mm of rainfall, and sunshine drops to 11.2 hours.
No, January scores just 0.7 out of 10. Daytime highs sit at -1.2°C and lows drop to -5.9°C, with only 1.4 hours of sunshine a day. Rain or snow falls on about 14 days, and the sea temperature is near freezing at 0.1°C, though this is the season for snow and polar night if that's what you're after.
September is an ok month, scoring 5.6 out of 10. Highs average 15.4°C and the sea still holds warmth at 17.1°C, but sunshine falls to 8.2 hours a day as days shorten. Rain days are moderate at 10.6, with 70mm of rainfall across the month.
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