The temperatures in Saint John in August are comfortable with low of 14°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in Saint John during the month of August. 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 August 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
22° / 14°
Rainy Days
3
Snowy Days
0
Dry Days
28
Rainfall
63
mm
Sun Hours
10.1
Hrs
