Climate averages 1991–2020
Słupsk weather
in May.
A mild, moderately wet month: the 5th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Słupsk: daytime highs average 15.4°C and nights cool to about 8.1°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 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 01 min on an average May day.
The nearest other city in this atlas is Koszalin (63 km away). In May its highs average 16.2°C, 0.8°C warmer than Słupsk, with 56 mm of rain.
Among the 60 cities listed in Poland, Słupsk ranks 60th 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; Słupsk is 2.8°C cooler than that mean.
From May to June, average highs rise by 3.2°C to 18.6°C, and monthly rainfall rises from 56 mm to 68 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
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 | 11.0°C3.6°C | 3.6°C | 36 | 8.8 | 14.014 h |
| May, selected | 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
May in nearby cities
- Koszalin in MayPoland · 63 kmHigh 16.2°C · Low 8.2°C · 56 mm rain
- Gdynia in MayPoland · 97 kmHigh 16.3°C · Low 8.2°C · 62 mm rain
- Gdańsk in MayPoland · 106 kmHigh 16.7°C · Low 8.1°C · 59 mm rain
- Piła in MayPoland · 147 kmHigh 18.1°C · Low 8.7°C · 59 mm rain
- Grudziądz in MayPoland · 157 kmHigh 17.9°C · Low 8.6°C · 62 mm rain
- Elbląg in MayPoland · 158 kmHigh 16.6°C · Low 8.7°C · 57 mm rain
- Bydgoszcz in MayPoland · 162 kmHigh 18.4°C · Low 8.8°C · 58 mm rain
- Fordon in MayPoland · 164 kmHigh 18.2°C · Low 8.9°C · 60 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.