Cool
Average highs are around 7°C, so pack for cooler days.
May verdict
Poor for holiday weather
Average highs are around 7°C, so pack for cooler days. Sunshine averages 7h per day, enough for a balanced month. Rainfall averages 46mm, which is relatively low for holiday planning.

Monthly averages
Temp
7°C
Rain
46mm
Sun
7h
Sea
6°C
Weather score
30
Poor
Cool
Average highs are around 7°C, so pack for cooler days.
Drier
Rainfall averages 46mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7h per day, enough for a balanced month.
Cool sea
Sea temperatures average 6°C, so the water can feel cool.
Map
Compare Tromso, Norway with nearby places by weather score, rain, sun, temperature, and swim conditions.
May7°C average high
May is close to Tromso's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
May46mm average rain
May is one of Tromso's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsMarch to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May7 hours average sun
May is one of Tromso's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to July
This stretch has the strongest sunshine in the monthly averages.
May6°C average sea
May is below Tromso's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 10°C in this stretch, so swimming comfort is at its strongest.
May30 weather score
May is one of Tromso's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsApril to August
These months have the strongest weather score in the monthly averages.