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Vantaa climate by month
What the weather is like
Vantaa has a warm-summer humid continental climate (Köppen Dfb): warm summers, cold winters and precipitation in every season.
The warmest month is July, when afternoons average 23° and nights 14°. February is the coolest month, with highs of -2° and lows of -8°. The difference between the warmest and the coolest month is about 23°, a large swing typical of continental interiors.
About 723 mm of precipitation falls in an average year. December is the wettest month (62 mm, 15 wet days) and April the driest (35 mm, 9 wet days). Cloud cover ranges from 32% in May to 63% in November.
The sea reaches about 17° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Helsinki, the capital, Vantaa is 1.8° warmer on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 23° · July
- Coldest nights
- -8° · February
- Wettest month
- December
- Driest month
- April
- Clearest skies
- May · 32% cloud
- Warmest sea
- 17° · August
- Longest day
- 18 h 55 min
- Shortest day
- 5 h 51 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | -1° | -2° | 3° | 9° | 16° | 20° | 23° | 21° | 16° | 9° | 4° | 1° |
| Average low | -7° | -8° | -5° | 1° | 6° | 11° | 14° | 12° | 8° | 3° | -1° | -4° |
| Precipitation | 56 mm | 37 mm | 41 mm | 35 mm | 41 mm | 65 mm | 74 mm | 86 mm | 66 mm | 83 mm | 77 mm | 62 mm |
| Wet days (≥1 mm) | 13.6 | 10.8 | 10.1 | 8.9 | 9.5 | 11.5 | 11.9 | 12.8 | 12.3 | 13.3 | 14.2 | 15.1 |
| Cloud cover | 62% | 57% | 49% | 42% | 32% | 36% | 33% | 37% | 42% | 50% | 63% | 63% |
| Sea temperature | 2° | 1° | 1° | 2° | 6° | 11° | 16° | 17° | 14° | 10° | 7° | 4° |
| Daylight | 6h 37 | 9h 08 | 11h 42 | 14h 34 | 17h 11 | 18h 55 | 18h 11 | 15h 45 | 12h 57 | 10h 14 | 7h 31 | 5h 51 |
| Month score | 13 | 21 | 26 | 32 | 68 | 70 | 71 | 67 | 54 | 18 | 11 | 11 |