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Joensuu, Finland climate
Dfc Subarctic
Joensuu has a strongly seasonal cold-temperate climate (Subarctic, Köppen Dfc). The hottest month is July with an average daily high near 22°C, while the coldest is February averaging around −12°C at night. Precipitation is fairly even year-round, totalling about 668 mm. At latitude 63°N, day length swings from 4.4 hours in midwinter to 19.5 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 countsJoensuu climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −6 | −5 | 0 | 6 | 14 | 19 | 22 | 19 | 13 | 6 | 0 | −3 |
| Avg temp (°C) | −9 | −9 | −4 | 2 | 9 | 14 | 17 | 15 | 10 | 3 | −2 | −6 |
| Avg low (°C) | −12 | −12 | −8 | −2 | 4 | 9 | 13 | 11 | 6 | 1 | −4 | −8 |
| Precipitation (mm) | 51 | 39 | 40 | 37 | 42 | 72 | 72 | 68 | 65 | 68 | 59 | 55 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −6 | −5 | 0 | 6 | 14 | 19 |
| Avg temp (°C) | −9 | −9 | −4 | 2 | 9 | 14 |
| Avg low (°C) | −12 | −12 | −8 | −2 | 4 | 9 |
| Precipitation (mm) | 51 | 39 | 40 | 37 | 42 | 72 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 19 | 13 | 6 | 0 | −3 |
| Avg temp (°C) | 17 | 15 | 10 | 3 | −2 | −6 |
| Avg low (°C) | 13 | 11 | 6 | 1 | −4 | −8 |
| Precipitation (mm) | 72 | 68 | 65 | 68 | 59 | 55 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 5 | 4 | 4 | 3 | 4 | 4 | 4 | 4 | 5 | 6 | 6 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | 0.0 | 0.1 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 30 | 28 | 29 | 21 | 7 | 0.2 | — | 0.0 | 3 | 13 | 23 | 29 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 5 | 4 | 4 | 3 | 4 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | 0.0 |
| Days with low ≤ 0°C (days) | 30 | 28 | 29 | 21 | 7 | 0.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 4 | 4 | 5 | 6 | 6 |
| Days with high ≥ 32°C (days) | 0.1 | — | — | — | — | — |
| Days with low ≤ 0°C (days) | — | 0.0 | 3 | 13 | 23 | 29 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 71 | 66 | 69 | 70 | 69 | 69 | 69 | 72 | 79 | 78 | 77 |
| Clear days (≤ 30% cloud) | 3 | 4 | 4 | 3 | 3 | 3 | 3 | 4 | 3 | 2 | 3 | 2 |
| Partly cloudy days (30–70%) | 9 | 8 | 11 | 10 | 10 | 10 | 11 | 10 | 9 | 7 | 6 | 7 |
| Cloudy days (≥ 70%) | 20 | 17 | 16 | 17 | 18 | 17 | 17 | 18 | 18 | 23 | 22 | 22 |
| Relative humidity (%) | 99 | 98 | 97 | 88 | 77 | 76 | 79 | 82 | 87 | 93 | 97 | 98 |
| Wind speed (km/h) | 5.9 | 6.6 | 7.5 | 7.7 | 6.8 | 6.3 | 6.0 | 6.0 | 6.2 | 5.5 | 4.4 | 5.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 71 | 66 | 69 | 70 | 69 |
| Clear days (≤ 30% cloud) | 3 | 4 | 4 | 3 | 3 | 3 |
| Partly cloudy days (30–70%) | 9 | 8 | 11 | 10 | 10 | 10 |
| Cloudy days (≥ 70%) | 20 | 17 | 16 | 17 | 18 | 17 |
| Relative humidity (%) | 99 | 98 | 97 | 88 | 77 | 76 |
| Wind speed (km/h) | 5.9 | 6.6 | 7.5 | 7.7 | 6.8 | 6.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 69 | 69 | 72 | 79 | 78 | 77 |
| Clear days (≤ 30% cloud) | 3 | 4 | 3 | 2 | 3 | 2 |
| Partly cloudy days (30–70%) | 11 | 10 | 9 | 7 | 6 | 7 |
| Cloudy days (≥ 70%) | 17 | 18 | 18 | 23 | 22 | 22 |
| Relative humidity (%) | 79 | 82 | 87 | 93 | 97 | 98 |
| Wind speed (km/h) | 6.0 | 6.0 | 6.2 | 5.5 | 4.4 | 5.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Liperi Joensuun Lentoasema, a weather station, about 10 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.