Uusimaa weather in January
January is one of the least pleasant months in Uusimaa: highs of -1°C (29°F) and about 56 mm (2.2 in) of rain on average. Nights average -4°C (24°F) and cloud cover 82% (NASA POWER, 2001–2025 averages). It is the 5th driest month of the year and the 2nd coolest. Compared with December, it is cooler and drier; February brings highs of -2°C (28°F) and 45 mm (1.8 in) of rain.
Figures are long-term averages for Helsinki, the largest city in Uusimaa. See below for other places.
Is January a good time to visit Uusimaa?
least pleasant month Weather score 34/100.
January is one of the least pleasant months for weather in Uusimaa. For better conditions, consider Jun–Aug.
Does it rain a lot in Uusimaa in January?
No, it is usually dry: about 56 mm (2.2 in) falls in an average January. It is the 5th driest month of the year.
How warm is Uusimaa in January?
Days average -1°C (29°F) and nights -4°C (24°F).
Uusimaa weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -1°C (29°F) | -4°C (24°F) | 56 mm | 82% | least pleasant |
| February | -2°C (28°F) | -5°C (22°F) | 45 mm | 79% | least pleasant |
| March | 0°C (33°F) | -3°C (26°F) | 42 mm | 69% | least pleasant |
| April | 5°C (42°F) | 1°C (34°F) | 41 mm | 67% | least pleasant |
| May | 11°C (52°F) | 6°C (43°F) | 48 mm | 62% | fair |
| June | 16°C (60°F) | 11°C (53°F) | 66 mm | 66% | best |
| July | 20°C (67°F) | 16°C (60°F) | 59 mm | 64% | best |
| August | 19°C (66°F) | 15°C (60°F) | 71 mm | 63% | best |
| September | 15°C (59°F) | 12°C (53°F) | 63 mm | 67% | fair |
| October | 9°C (48°F) | 6°C (43°F) | 80 mm | 78% | least pleasant |
| November | 5°C (40°F) | 2°C (36°F) | 75 mm | 85% | least pleasant |
| December | 1°C (34°F) | -1°C (29°F) | 67 mm | 85% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Uusimaa in January
Weather can differ a lot within Uusimaa: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Helsinki | -1°C (29°F) | -4°C (24°F) | 56 mm | least pleasant |
| Espoo | -1°C (29°F) | -5°C (23°F) | 59 mm | least pleasant |
| Vantaa | -4°C (25°F) | -8°C (17°F) | 56 mm | least pleasant |
| East Helsinki | -1°C (29°F) | -4°C (24°F) | 56 mm | least pleasant |
| Porvoo | -4°C (25°F) | -8°C (17°F) | 55 mm | least pleasant |
| Järvenpää | -4°C (25°F) | -8°C (17°F) | 56 mm | least pleasant |
| Lohja | -1°C (29°F) | -5°C (23°F) | 59 mm | least pleasant |
| Nurmijärvi | -4°C (25°F) | -8°C (17°F) | 56 mm | least pleasant |
| Hyvinge | -4°C (25°F) | -8°C (17°F) | 56 mm | least pleasant |
| Tuusula | -4°C (25°F) | -8°C (17°F) | 56 mm | least pleasant |
| Kirkkonummi | -1°C (29°F) | -5°C (23°F) | 59 mm | least pleasant |
| Vuosaari | -1°C (29°F) | -4°C (24°F) | 56 mm | least pleasant |