The temperatures in Dorchester in May are quite cold with temperatures between 7°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Dorchester during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Dorchester in May 2025.
If you’re planning to visit Dorchester in the near future, we highly recommend that you review the 14 day weather forecast for Dorchester before you arrive.
Temperatures
16° / 7°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
83
mm
Sun Hours
7.8
Hrs
