The weather in Viseu in August is hot. The average temperatures are between 15°C and 30°C. Usually the days in August are hot while the nights are a bit cooler.
You can expect up to 3 rainy days in Viseu during the month of August.
Our weather forecast can give you a great sense of what weather to expect in Viseu in August 2025.
If you’re planning to visit Viseu in the near future, we highly recommend that you review the 14 day weather forecast for Viseu before you arrive.
Temperatures
30° / 15°
Rainy Days
1
Snowy Days
0
Dry Days
30
Rainfall
12
mm
Sun Hours
11.6
Hrs
