The temperatures in Viseu in September are comfortable with low of 14°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Viseu during the month of September. 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 Viseu in September 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
27° / 14°
Rainy Days
4
Snowy Days
0
Dry Days
26
Rainfall
55
mm
Sun Hours
11.1
Hrs
