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Suwałki, Poland climate
Dfb Warm-summer humid continental
Suwałki has a seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 75°F, while the coldest is January averaging around 21°F at night. Around 25 inches of precipitation falls each year, peaking in July (3.7 inches) and easing off in February (1.3 inches). At latitude 54°N, day length swings from 7.1 hours in midwinter to 16.9 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 figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Suwałki climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 30 | 32 | 41 | 55 | 65 | 71 | 75 | 74 | 64 | 52 | 40 | 33 |
| Avg temp (°F) | 26 | 27 | 34 | 45 | 54 | 60 | 64 | 63 | 55 | 45 | 36 | 29 |
| Avg low (°F) | 21 | 22 | 26 | 35 | 43 | 50 | 54 | 53 | 46 | 38 | 32 | 25 |
| Precipitation (in) | 1.6 | 1.3 | 1.4 | 1.4 | 2.3 | 2.5 | 3.7 | 2.8 | 2.0 | 2.1 | 1.8 | 1.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 30 | 32 | 41 | 55 | 65 | 71 |
| Avg temp (°F) | 26 | 27 | 34 | 45 | 54 | 60 |
| Avg low (°F) | 21 | 22 | 26 | 35 | 43 | 50 |
| Precipitation (in) | 1.6 | 1.3 | 1.4 | 1.4 | 2.3 | 2.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 75 | 74 | 64 | 52 | 40 | 33 |
| Avg temp (°F) | 64 | 63 | 55 | 45 | 36 | 29 |
| Avg low (°F) | 54 | 53 | 46 | 38 | 32 | 25 |
| Precipitation (in) | 3.7 | 2.8 | 2.0 | 2.1 | 1.8 | 1.8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 72 | 65 | 63 | 66 | 66 | 63 | 65 | 72 | 79 | 75 |
| Relative humidity (%) | 96 | 94 | 87 | 79 | 77 | 77 | 77 | 76 | 80 | 87 | 94 | 96 |
| Wind speed (mph) | 6.1 | 6.1 | 5.8 | 4.9 | 4.6 | 4.4 | 4.1 | 3.9 | 4.4 | 4.9 | 5.2 | 5.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 72 | 65 | 63 | 66 |
| Relative humidity (%) | 96 | 94 | 87 | 79 | 77 | 77 |
| Wind speed (mph) | 6.1 | 6.1 | 5.8 | 4.9 | 4.6 | 4.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 63 | 65 | 72 | 79 | 75 |
| Relative humidity (%) | 77 | 76 | 80 | 87 | 94 | 96 |
| Wind speed (mph) | 4.1 | 3.9 | 4.4 | 4.9 | 5.2 | 5.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Suwalki, a weather station, about 3 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.