Finland climate by month
8-year averages · when to visit| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Helsinki | 32° | 30° | 36° | 46° | 57° | 66° | 70° | 68° | 61° | 50° | 41° | 34° |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Helsinki | 16 | 11 | 11 | 10 | 9 | 10 | 12 | 13 | 12 | 14 | 13 | 15 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Helsinki | 33° | 32° | 34° | 40° | 50° | 61° | 66° | 68° | 62° | 52° | 44° | 38° |
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
Helsinki climate in September
8-year averages · when to visitBest months: June–August · September: Acceptable
| August | September | October | |
|---|---|---|---|
| Average temperature | ▼ 63°F | 55°F | ▼ 46°F |
| Typical high | ▼ 68°F | 61°F | ▼ 50°F |
| Typical low | ▼ 57°F | 50°F | ▼ 41°F |
| Water temperature | ▼ 68°F | 62°F | ▼ 52°F |
| Precipitation | ▼ 3.4 in | 3.1 in | ▲ 3.3 in |
| Wet days | ▼ 13 d | 12 d | ▲ 14 d |
| Humidity | ▲ 78% | 83% | → 83% |
| Sunshine per day | ▼ 11.3 h | 8.6 h | ▼ 4.9 h |
| Cloud cover | ▲ 27% | 33% | ▲ 51% |
| Midday UV | ▼ 6 | 4 | ▼ 2 |
| Daylight | 15:36 | 12:52 | 10:06 |
| Our take | Good | Acceptable | Poor |
September temperatures day by day daily mean + smoothed trend · °F
September precipitation day by day in
September UV day by day clear-sky midday value
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
More destinations in Europe
🌍
🇮🇸
🌍
🌍
🌍
🌍
London
United Kingdom
Iceland
Europe
Paris
France
Amsterdam
Netherlands
Prague
Czechia
Copenhagen
Denmark
NBM + global weather models
Updated: 7:09 PM
Finland · 9 weather points · Climate reference: Helsinki (60.17°N, 24.94°E) · Europe/Helsinki