Click on a day for an hourly weather forecast
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 11° / 3° | 8 | 22 | 1 | 165 mm | Bad | Viseu in January |
| February | 12° / 4° | 8 | 20 | 1 | 159 mm | Bad | Viseu in February |
| March | 15° / 5° | 8 | 23 | 0 | 128 mm | Ok | Viseu in March |
| April | 17° / 7° | 8 | 22 | 0 | 110 mm | Ok | Viseu in April |
| May | 22° / 10° | 5 | 26 | 0 | 67 mm | Good | Viseu in May |
| June | 25° / 12° | 3 | 27 | 0 | 42 mm | Perfect | Viseu in June |
| July | 30° / 14° | 1 | 30 | 0 | 12 mm | Good | Viseu in July |
| August | 30° / 15° | 1 | 30 | 0 | 12 mm | Good | Viseu in August |
| September | 27° / 14° | 4 | 26 | 0 | 55 mm | Perfect | Viseu in September |
| October | 21° / 11° | 6 | 25 | 0 | 139 mm | Good | Viseu in October |
| November | 14° / 7° | 8 | 22 | 0 | 144 mm | Ok | Viseu in November |
| December | 12° / 5° | 8 | 22 | 0 | 183 mm | Bad | Viseu in December |