Climate averages 1991–2020
Koszalin weather
in May.
A mild, moderately wet month: the 5th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Koszalin: daytime highs average 16.2°C and nights cool to about 8.2°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 56 mm of rain on roughly 11 days, which makes May a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 59 min on an average May day.
The nearest other city in this atlas is Słupsk (63 km away). In May its highs average 15.4°C, 0.8°C cooler than Koszalin, with 56 mm of rain.
Among the 60 cities listed in Poland, Koszalin ranks joint 58th of 60 for the warmest May highs and joint 6th of 60 for the driest May (rainfall, lowest first). The mean May high of those 60 cities is 18.1°C; Koszalin is 2.0°C cooler than that mean.
From May to June, average highs rise by 3.1°C to 19.2°C, and monthly rainfall rises from 56 mm to 71 mm.
The annual picture
May 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 | 11.8°C3.8°C | 3.8°C | 38 | 8.9 | 14.014 h |
| May, selected | 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
May in nearby cities
- Słupsk in MayPoland · 63 kmHigh 15.4°C · Low 8.1°C · 56 mm rain
- Stargard in MayPoland · 121 kmHigh 17.9°C · Low 8.8°C · 57 mm rain
- Piła in MayPoland · 122 kmHigh 18.1°C · Low 8.7°C · 59 mm rain
- Szczecin in MayPoland · 136 kmHigh 17.7°C · Low 8.8°C · 55 mm rain
- Gdynia in MayPoland · 157 kmHigh 16.3°C · Low 8.2°C · 62 mm rain
- Gdańsk in MayPoland · 162 kmHigh 16.7°C · Low 8.1°C · 59 mm rain
- Bydgoszcz in MayPoland · 170 kmHigh 18.4°C · Low 8.8°C · 58 mm rain
- Gorzów Wielkopolski in MayPoland · 174 kmHigh 18.6°C · Low 9.4°C · 55 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.