Climate averages 1991–2020
Słupsk weather
in April.
A cool, fairly dry month: the 7th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Słupsk: daytime highs average 11.0°C and nights cool to about 3.6°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 36 mm of rain on roughly 9 days, which makes April a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 02 min on an average April day.
The nearest other city in this atlas is Koszalin (63 km away). In April its highs average 11.8°C, 0.8°C warmer than Słupsk, with 38 mm of rain.
Among the 60 cities listed in Poland, Słupsk ranks 60th of 60 for the warmest April highs and joint 10th of 60 for the driest April (rainfall, lowest first). The mean April high of those 60 cities is 13.4°C; Słupsk is 2.4°C cooler than that mean.
From April to May, average highs rise by 4.4°C to 15.4°C, and monthly rainfall rises from 36 mm to 56 mm.
The annual picture
April 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 | 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, selected | 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
April in nearby cities
- Koszalin in AprilPoland · 63 kmHigh 11.8°C · Low 3.8°C · 38 mm rain
- Gdynia in AprilPoland · 97 kmHigh 11.6°C · Low 3.5°C · 42 mm rain
- Gdańsk in AprilPoland · 106 kmHigh 11.9°C · Low 3.5°C · 40 mm rain
- Piła in AprilPoland · 147 kmHigh 13.3°C · Low 3.8°C · 35 mm rain
- Grudziądz in AprilPoland · 157 kmHigh 13.2°C · Low 3.6°C · 38 mm rain
- Elbląg in AprilPoland · 158 kmHigh 11.9°C · Low 3.9°C · 42 mm rain
- Bydgoszcz in AprilPoland · 162 kmHigh 13.5°C · Low 3.8°C · 35 mm rain
- Fordon in AprilPoland · 164 kmHigh 13.4°C · Low 4.0°C · 36 mm rain
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.