The temperatures in Saint John in May are quite cold with temperatures between 6°C and 13°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Saint John 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 Saint John in May 2025.
If you’re planning to visit Saint John in the near future, we highly recommend that you review the 14 day weather forecast for Saint John before you arrive.
Temperatures
13° / 6°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
95
mm
Sun Hours
8.1
Hrs
