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Vaasa, Finland climate
Dfb Warm-summer humid continental
Vaasa has a seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 22°C, while the coldest is February averaging around −10°C at night. Around 560 mm of precipitation falls each year, peaking in July (74 mm) and easing off in February (24 mm). At latitude 63°N, day length swings from 4.3 hours in midwinter to 19.7 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsVaasa climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −3 | −3 | 2 | 8 | 15 | 19 | 22 | 20 | 15 | 7 | 2 | −1 |
| Avg temp (°C) | −6 | −6 | −3 | 4 | 9 | 14 | 17 | 15 | 10 | 4 | 0 | −4 |
| Avg low (°C) | −9 | −10 | −7 | −1 | 3 | 8 | 11 | 10 | 6 | 1 | −3 | −6 |
| Precipitation (mm) | 32 | 24 | 26 | 28 | 46 | 59 | 74 | 73 | 53 | 58 | 47 | 40 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −3 | −3 | 2 | 8 | 15 | 19 |
| Avg temp (°C) | −6 | −6 | −3 | 4 | 9 | 14 |
| Avg low (°C) | −9 | −10 | −7 | −1 | 3 | 8 |
| Precipitation (mm) | 32 | 24 | 26 | 28 | 46 | 59 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 20 | 15 | 7 | 2 | −1 |
| Avg temp (°C) | 17 | 15 | 10 | 4 | 0 | −4 |
| Avg low (°C) | 11 | 10 | 6 | 1 | −3 | −6 |
| Precipitation (mm) | 74 | 73 | 53 | 58 | 47 | 40 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 17 | 13 | 12 | 10 | 11 | 12 | 14 | 15 | 14 | 16 | 17 | 17 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | 0.0 | 0.2 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 29 | 26 | 27 | 19 | 8 | 0.4 | — | 0.3 | 5 | 12 | 20 | 25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 17 | 13 | 12 | 10 | 11 | 12 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | 0.0 |
| Days with low ≤ 0°C (days) | 29 | 26 | 27 | 19 | 8 | 0.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 15 | 14 | 16 | 17 | 17 |
| Days with high ≥ 32°C (days) | 0.2 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | — | 0.3 | 5 | 12 | 20 | 25 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 71 | 65 | 64 | 63 | 65 | 64 | 65 | 68 | 77 | 78 | 77 |
| Clear days (≤ 30% cloud) | 2 | 4 | 4 | 5 | 5 | 4 | 4 | 4 | 3 | 2 | 2 | 2 |
| Partly cloudy days (30–70%) | 8 | 8 | 11 | 11 | 11 | 11 | 12 | 12 | 10 | 8 | 7 | 7 |
| Cloudy days (≥ 70%) | 21 | 17 | 16 | 14 | 15 | 15 | 15 | 15 | 16 | 21 | 21 | 21 |
| Relative humidity (%) | 98 | 98 | 94 | 83 | 78 | 78 | 81 | 85 | 88 | 93 | 97 | 98 |
| Wind speed (km/h) | 3.2 | 3.1 | 2.8 | 2.2 | 1.5 | 1.3 | 1.3 | 1.6 | 1.8 | 1.8 | 2.2 | 2.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 71 | 65 | 64 | 63 | 65 |
| Clear days (≤ 30% cloud) | 2 | 4 | 4 | 5 | 5 | 4 |
| Partly cloudy days (30–70%) | 8 | 8 | 11 | 11 | 11 | 11 |
| Cloudy days (≥ 70%) | 21 | 17 | 16 | 14 | 15 | 15 |
| Relative humidity (%) | 98 | 98 | 94 | 83 | 78 | 78 |
| Wind speed (km/h) | 3.2 | 3.1 | 2.8 | 2.2 | 1.5 | 1.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 65 | 68 | 77 | 78 | 77 |
| Clear days (≤ 30% cloud) | 4 | 4 | 3 | 2 | 2 | 2 |
| Partly cloudy days (30–70%) | 12 | 12 | 10 | 8 | 7 | 7 |
| Cloudy days (≥ 70%) | 15 | 15 | 16 | 21 | 21 | 21 |
| Relative humidity (%) | 81 | 85 | 88 | 93 | 97 | 98 |
| Wind speed (km/h) | 1.3 | 1.6 | 1.8 | 1.8 | 2.2 | 2.8 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Seinajoki Pelmaa, a weather station, about 48 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.