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Pori, Finland climate
Dfb Warm-summer humid continental
Pori 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 January averaging around −7°C at night. Around 606 mm of precipitation falls each year, peaking in September (69 mm) and easing off in March (28 mm). At latitude 61°N, day length swings from 5.0 hours in midwinter to 19.0 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 countsPori climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −2 | −1 | 3 | 9 | 16 | 19 | 22 | 21 | 16 | 9 | 5 | 1 |
| Avg temp (°C) | −5 | −4 | −1 | 4 | 11 | 15 | 18 | 16 | 12 | 6 | 2 | −1 |
| Avg low (°C) | −7 | −6 | −4 | 0 | 6 | 10 | 13 | 12 | 8 | 3 | 0 | −4 |
| Precipitation (mm) | 36 | 32 | 28 | 31 | 42 | 58 | 67 | 61 | 69 | 62 | 62 | 58 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −2 | −1 | 3 | 9 | 16 | 19 |
| Avg temp (°C) | −5 | −4 | −1 | 4 | 11 | 15 |
| Avg low (°C) | −7 | −6 | −4 | 0 | 6 | 10 |
| Precipitation (mm) | 36 | 32 | 28 | 31 | 42 | 58 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 21 | 16 | 9 | 5 | 1 |
| Avg temp (°C) | 18 | 16 | 12 | 6 | 2 | −1 |
| Avg low (°C) | 13 | 12 | 8 | 3 | 0 | −4 |
| Precipitation (mm) | 67 | 61 | 69 | 62 | 62 | 58 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 12 | 11 | 10 | 9 | 10 | 10 | 11 | 12 | 15 | 17 | 19 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — | 0.5 | 0.1 | — | — | — | — |
| Days with low ≤ 0°C (days) | 25 | 23 | 23 | 14 | 3 | — | — | — | 0.4 | 9 | 14 | 22 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 12 | 11 | 10 | 9 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 25 | 23 | 23 | 14 | 3 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 11 | 12 | 15 | 17 | 19 |
| Days with high ≥ 32°C (days) | 0.5 | 0.1 | — | — | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.4 | 9 | 14 | 22 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 76 | 68 | 60 | 56 | 61 | 60 | 61 | 66 | 75 | 82 | 81 |
| Clear days (≤ 30% cloud) | 0.7 | 2 | 3 | 6 | 7 | 5 | 6 | 6 | 4 | 2 | 0.5 | 0.7 |
| Partly cloudy days (30–70%) | 7 | 8 | 12 | 12 | 13 | 12 | 12 | 12 | 10 | 9 | 7 | 7 |
| Cloudy days (≥ 70%) | 23 | 18 | 16 | 12 | 11 | 13 | 13 | 14 | 16 | 20 | 23 | 23 |
| Relative humidity (%) | 96 | 96 | 91 | 83 | 79 | 79 | 81 | 83 | 87 | 91 | 94 | 96 |
| Wind speed (km/h) | 5.4 | 4.9 | 4.5 | 3.9 | 3.2 | 3.2 | 3.5 | 4.1 | 4.8 | 5.1 | 5.2 | 5.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 76 | 68 | 60 | 56 | 61 |
| Clear days (≤ 30% cloud) | 0.7 | 2 | 3 | 6 | 7 | 5 |
| Partly cloudy days (30–70%) | 7 | 8 | 12 | 12 | 13 | 12 |
| Cloudy days (≥ 70%) | 23 | 18 | 16 | 12 | 11 | 13 |
| Relative humidity (%) | 96 | 96 | 91 | 83 | 79 | 79 |
| Wind speed (km/h) | 5.4 | 4.9 | 4.5 | 3.9 | 3.2 | 3.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 61 | 66 | 75 | 82 | 81 |
| Clear days (≤ 30% cloud) | 6 | 6 | 4 | 2 | 0.5 | 0.7 |
| Partly cloudy days (30–70%) | 12 | 12 | 10 | 9 | 7 | 7 |
| Cloudy days (≥ 70%) | 13 | 14 | 16 | 20 | 23 | 23 |
| Relative humidity (%) | 81 | 83 | 87 | 91 | 94 | 96 |
| Wind speed (km/h) | 3.5 | 4.1 | 4.8 | 5.1 | 5.2 | 5.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 12 years of daily observations at Pori Rautatieasema, a weather station, inside the city. 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.