The temperatures in Giessen in May are quite cold with temperatures between 7°C and 18°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Giessen. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Giessen in May 2026.
If you’re planning to visit Giessen in the near future, we highly recommend that you review the 14 day weather forecast for Giessen before you arrive.
Temperatures
18° / 7°
Rainy Days
12
Snowy Days
0
Dry Days
19
Rainfall
189
mm
Sun Hours
8.8
Hrs
