The temperatures in Lewiston in August are comfortable with low of 15°C and and high up to 25°C.
You can expect about 3 to 8 days of rain in Lewiston 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 Lewiston in August 2025.
If you’re planning to visit Lewiston in the near future, we highly recommend that you review the 14 day weather forecast for Lewiston before you arrive.
Temperatures
25° / 15°
Rainy Days
5
Snowy Days
0
Dry Days
26
Rainfall
111
mm
Sun Hours
10.4
Hrs
