Weather in September 2025

Viana do Castelo weather in September 2025

The temperatures in Viana do Castelo in September are comfortable with low of 16°C and and high up to 23°C.

You can expect about 3 to 8 days of rain in Viana do Castelo 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 Viana do Castelo in September 2025.

If you’re planning to visit Viana do Castelo in the near future, we highly recommend that you review the 14 day weather forecast for Viana do Castelo before you arrive.

Temperatures
Temperatures
23° / 16°
Rainy Days
Rainy Days
3
Snowy Days
Snowy Days
0
Dry Days
Dry Days
27
Rainfall
Rainfall
26
mm
2.9
Sun Hours
2.9
Hrs

Viana do Castelo annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 13° / 8° 9 22 0 77 mm
Bad
February 14° / 8° 7 21 0 57 mm
Ok
March 15° / 9° 8 23 0 59 mm
Ok
April 17° / 10° 7 23 0 49 mm
Good
May 19° / 12° 5 26 0 34 mm
Good
June 21° / 15° 3 27 0 17 mm
Good
July 23° / 16° 1 30 0 7 mm
Perfect
August 24° / 17° 1 30 0 8 mm
Perfect
September 23° / 16° 3 27 0 26 mm
Perfect
October 20° / 14° 9 22 0 90 mm
Ok
November 16° / 11° 10 20 0 79 mm
Ok
December 14° / 9° 10 21 0 86 mm
Ok
Temperatures in Viana do Castelo in September
Rain in Viana do Castelo in September

Weather in Viana do Castelo in September - FAQ

What is the average temperature in Viana do Castelo in September?
The average temperature in Viana do Castelo in September is 16/23° C.
What is the chance of rain in Viana do Castelo in September?
On average, there are 3 rainy days in Viana do Castelo during September.
Weather wise, is September a good time to visit Viana do Castelo?
The weather in Viana do Castelo in September is perfect.
Can it snow in Viana do Castelo in September?
On average, there are 0 snowy days in Viana do Castelo in September.
More about the weather in Viana do Castelo