Hell, Norway in May has mild conditions, with highs averaging 13.4°C (56°F) and noticeably cooler mornings. Rain falls on about 15 days this month, totalling around 85 mm. Sea temperature stays cool at 10.3°C (51°F).
This month falls at the end of Spring.
Daily highs in May gradually rise from around 10°C (49°F) at the start to 16°C (61°F) by month's end.
Rainfall is heaviest during the last third of the month, while the middle tends to be drier.
Expect around 11.4h of sunshine at the start of May, increasing to 12.3h by the end.
The warmest days tend to fall around the 31th, averaging 16.6°C (62°F).