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Best time to visit · Finland
For the most comfortable weather in Helsinki, aim for July & August. July tops our comfort score at 86/100, with highs around 67°F (19°C) and 2.3 in (59 mm) of rain. June and September are good shoulder-season months. The toughest months are November – January, mainly because of cool days.
Highs run from 28°F to 67°F across the year, and the yearly total is about 28.1 in (713 mm) of rain and snow.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 29°F-1°C | 28°F-2°C | 32°F0°C | 41°F5°C | 52°F11°C | 60°F16°C | 67°F19°C | 66°F19°C | 59°F15°C | 48°F9°C | 40°F4°C | 34°F1°C |
| Avg low | 24°F-5°C | 22°F-6°C | 26°F-3°C | 33°F1°C | 43°F6°C | 52°F11°C | 60°F16°C | 60°F15°C | 53°F12°C | 43°F6°C | 36°F2°C | 29°F-2°C |
| Rain/snow | 2.2 in56 mm | 1.8 in45 mm | 1.7 in42 mm | 1.6 in41 mm | 1.9 in48 mm | 2.6 in66 mm | 2.3 in59 mm | 2.8 in71 mm | 2.5 in63 mm | 3.1 in80 mm | 3.0 in75 mm | 2.6 in67 mm |
| Humidity | 93% | 94% | 90% | 85% | 81% | 81% | 81% | 80% | 83% | 87% | 90% | 92% |
| Cloud | 82% | 79% | 69% | 67% | 62% | 66% | 64% | 63% | 67% | 78% | 85% | 85% |
| Comfort | 41 | 43 | 47 | 49 | 67 | 77 | 86 | 85 | 76 | 51 | 38 | 38 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 9 m (30 ft), close to Helsinki's own ~22 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The cold peaks here: highs of 28–34°F (-2–1°C), and nights reach 22°F (-6°C). About 6.6 in (168 mm) of rain or snow falls across these months, 24% of the year's total. December – February are cold enough for snow. Comfort scores bottom out in December & January; the season averages 41/100.
Temperatures climb through the season, from 32°F highs in March to 52°F by May. It's the driest season, with only about 5.2 in (131 mm) of rain or snow, 18% of the year's total. March is cold enough for snow. Comfort scores sit mid-table, averaging 54/100.
Peak warmth: highs of 60–67°F (16–19°C). About 7.7 in (196 mm) of rain falls across these months, 27% of the year's total. Lows bottom out around 52°F (11°C). Comfort peaks here: July & August rank with the year's best, and the season averages 83/100.
Temperatures slide from 59°F highs in September to 40°F by November. It's the wettest season, with about 8.6 in (218 mm) of rain, 31% of the year's total. Lows bottom out around 36°F (2°C). It holds the toughest stretch on our comfort score (November), averaging 55/100.
By comfort score: 4 Great, 1 Good, 3 Fair and 4 Tough. Great months: June – September. Tap a month for its own guide.
For the most comfortable weather in Helsinki, aim for July & August. July tops our comfort score at 86/100, with highs around 67°F (19°C) and 2.3 in (59 mm) of rain. June and September are good shoulder-season months. The toughest months are November – January, mainly because of cool days.
October is the wettest month, averaging about 3.1 in (80 mm) of rain. April is the driest, with about 1.6 in (41 mm). The yearly total is around 28.1 in (713 mm).
February is the coldest, with average lows of 22°F (-6°C) and highs of 28°F (-2°C). The warmest is July, with average highs of 67°F (19°C).
Not very: summer (June – August) humidity averages 81%, and highs peak around 67°F (19°C), so it rarely feels sticky.
On average, yes: lows fall below 32°F (0°C) in December – March, bottoming out around 22°F (-6°C) in February.
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