Climate averages 1991–2020
Słupsk weather
in January.
A cold, moderately wet month: the coolest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Słupsk: daytime highs average 2.1°C and nights cool to about -1.4°C. By daytime temperature it is the coolest month of the year.
Expect about 59 mm of rain on roughly 12 days, which makes January a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 7 h 56 min on an average January day.
The nearest other city in this atlas is Koszalin (63 km away). In January its highs average 2.1°C, about as warm as Słupsk, with 54 mm of rain.
Among the 60 cities listed in Poland, Słupsk ranks joint 7th of 60 for the warmest January highs and 58th of 60 for the driest January (rainfall, lowest first). The mean January high of those 60 cities is 1.1°C; Słupsk is 1.0°C warmer than that mean.
From January to February, average highs rise by 0.6°C to 2.7°C, and monthly rainfall falls from 59 mm to 47 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Słupsk climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 2.1°C-1.4°C | -1.4°C | 59 | 12.1 | 7.98 h |
| February | 2.7°C-1.4°C | -1.4°C | 47 | 11.0 | 9.710 h |
| March | 5.7°C0.2°C | 0.2°C | 51 | 10.5 | 11.812 h |
| April | 11.0°C3.6°C | 3.6°C | 36 | 8.8 | 14.014 h |
| May | 15.4°C8.1°C | 8.1°C | 56 | 10.5 | 16.016 h |
| June | 18.6°C12.1°C | 12.1°C | 68 | 11.5 | 17.117 h |
| July | 21.0°C14.8°C | 14.8°C | 91 | 13.4 | 16.717 h |
| August | 21.1°C15.1°C | 15.1°C | 85 | 13.7 | 14.915 h |
| September | 17.1°C11.8°C | 11.8°C | 78 | 12.3 | 12.813 h |
| October | 12.0°C7.6°C | 7.6°C | 80 | 13.6 | 10.611 h |
| November | 6.9°C3.5°C | 3.5°C | 65 | 13.2 | 8.69 h |
| December | 3.4°C0.2°C | 0.2°C | 66 | 13.5 | 7.47 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Koszalin in JanuaryPoland · 63 kmHigh 2.1°C · Low -1.6°C · 54 mm rain
- Gdynia in JanuaryPoland · 97 kmHigh 1.8°C · Low -2.0°C · 47 mm precipitation
- Gdańsk in JanuaryPoland · 106 kmHigh 1.6°C · Low -2.2°C · 35 mm precipitation
- Piła in JanuaryPoland · 147 kmHigh 1.6°C · Low -2.6°C · 45 mm precipitation
- Grudziądz in JanuaryPoland · 157 kmHigh 1.0°C · Low -3.3°C · 38 mm precipitation
- Elbląg in JanuaryPoland · 158 kmHigh 1.2°C · Low -2.6°C · 47 mm precipitation
- Bydgoszcz in JanuaryPoland · 162 kmHigh 1.4°C · Low -3.0°C · 38 mm precipitation
- Fordon in JanuaryPoland · 164 kmHigh 1.3°C · Low -2.9°C · 38 mm precipitation
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Słupsk) is explained once on the Słupsk year overview and on the Sources, method and limits page.