Cool
Average highs are around 18°C, so pack for cooler days.
May verdict
Mixed for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 7.1h per day, enough for a balanced month. Rainfall averages 62mm, which is relatively low for holiday planning.

Monthly averages
Temp
18°C
Rain
62mm
Sun
7.1h
Weather score
41
Mixed
Cool
Average highs are around 18°C, so pack for cooler days.
Drier
Rainfall averages 62mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.1h per day, enough for a balanced month.
Map
Compare Hannover, Germany with nearby places by weather score, rain, sun, temperature, and swim conditions.
May18°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.
May62mm average rain
May sits near Hannover's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to May and August to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May7.1 hours average sun
May is one of Hannover'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.
May41 weather score
May sits close to Hannover'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.