Cool
Average highs are around 17°C, so pack for cooler days.
May verdict
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 7.5h per day, enough for a balanced month. Rainfall averages 47mm, which is relatively low for holiday planning.
Monthly averages
Temp
17°C
Rain
47mm
Sun
7.5h
Sea
9°C
Weather score
37
Poor
Cool
Average highs are around 17°C, so pack for cooler days.
Drier
Rainfall averages 47mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.5h per day, enough for a balanced month.
Cool sea
Sea temperatures average 9°C, so the water can feel cool.
Map
Compare Slowinski National Park, Poland with nearby places by weather score, rain, sun, temperature, and swim conditions.
May17°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
May47mm average rain
May sits near Slowinski National Park's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to June and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May7.5 hours average sun
May is one of Slowinski National Park's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
May9°C average sea
May is close to Slowinski National Park's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
May37 weather score
May sits close to Slowinski National Park's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.