Climate averages 1991–2020
Koszalin 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 Koszalin: daytime highs average 11.8°C and nights cool to about 3.8°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 38 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 01 min on an average April day.
The nearest other city in this atlas is Słupsk (63 km away). In April its highs average 11.0°C, 0.8°C cooler than Koszalin, with 36 mm of rain.
Among the 60 cities listed in Poland, Koszalin ranks joint 57th of 60 for the warmest April highs and joint 17th of 60 for the driest April (rainfall, lowest first). The mean April high of those 60 cities is 13.4°C; Koszalin is 1.6°C cooler than that mean.
From April to May, average highs rise by 4.4°C to 16.2°C, and monthly rainfall rises from 38 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
Koszalin 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-1.6°C | -1.6°C | 54 | 11.7 | 8.08 h |
| February | 3.0°C-1.5°C | -1.5°C | 44 | 10.3 | 9.710 h |
| March | 6.3°C0.1°C | 0.1°C | 49 | 10.3 | 11.812 h |
| April, selected | 11.8°C3.8°C | 3.8°C | 38 | 8.9 | 14.014 h |
| May | 16.2°C8.2°C | 8.2°C | 56 | 10.8 | 16.016 h |
| June | 19.2°C12.0°C | 12.0°C | 71 | 12.0 | 17.117 h |
| July | 21.6°C14.6°C | 14.6°C | 90 | 13.3 | 16.617 h |
| August | 21.6°C14.8°C | 14.8°C | 78 | 13.4 | 14.915 h |
| September | 17.4°C11.5°C | 11.5°C | 68 | 12.1 | 12.813 h |
| October | 12.2°C7.3°C | 7.3°C | 66 | 12.5 | 10.611 h |
| November | 6.9°C3.2°C | 3.2°C | 53 | 11.8 | 8.69 h |
| December | 3.3°C-0.1°C | -0.1°C | 58 | 12.4 | 7.57 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
- Słupsk in AprilPoland · 63 kmHigh 11.0°C · Low 3.6°C · 36 mm rain
- Stargard in AprilPoland · 121 kmHigh 13.4°C · Low 4.1°C · 39 mm rain
- Piła in AprilPoland · 122 kmHigh 13.3°C · Low 3.8°C · 35 mm rain
- Szczecin in AprilPoland · 136 kmHigh 13.3°C · Low 4.1°C · 38 mm rain
- Gdynia in AprilPoland · 157 kmHigh 11.6°C · Low 3.5°C · 42 mm rain
- Gdańsk in AprilPoland · 162 kmHigh 11.9°C · Low 3.5°C · 40 mm rain
- Bydgoszcz in AprilPoland · 170 kmHigh 13.5°C · Low 3.8°C · 35 mm rain
- Gorzów Wielkopolski in AprilPoland · 174 kmHigh 14.0°C · Low 4.5°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 Koszalin) is explained once on the Koszalin year overview and on the Sources, method and limits page.