Viana do Castelo in september: average Weather, Temperature and Climate
Weather in Viana do Castelo in september 2025
The weather in Viana do Castelo in september comes from statistical datas on the past years. You can view the weather statistics for all the month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
perfect weather UV index: 6
Weather at 6am
63°F
Clear/Sunny
60% of time
18%
10%
6%
Weather at 12pm
74°F
Clear/Sunny
67% of time
15%
9%
6%
Weather at 6pm
70°F
Clear/Sunny
67% of time
14%
10%
6%
Weather at 3am
63°F
60%
18%
12%
4%
Evolution of daily average temperature and precipitation in Viana do Castelo in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Viana do Castelo in september.
The climate of Viana do Castelo in september is perfect
In september in Viana do Castelo, the climate is relatively dry (with 3.2in of rainfall over 3 days). The situation is deteriorating compared to the previous month since in august there is an average of 1.3in of precipitation over 2 days.
The climate quite good in this city this month. The thermometer averaged maximum of 74°F. In the morning the temperature drops to 63°F. Thus, the mean temperature average on this month of september in Viana do Castelo is 68°F. Note that these seasonal averages are in contrast with those observed in Viana do Castelo in the month of september with a maximum record of 86°F in 2013 and a minimum record of 54°F in 2009.
In september in Viana do Castelo, the days on average last 12:29. The sun rises at 06:15 and sets at 18:44.
With a perfect climate, the month of september is advisable to go in Viana do Castelo in Portugal.
Seasonal average climate and temperature of Viana do Castelo in september
Check below seasonal norms These datas are compiled from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 68°F | ||||
| Highest temperature | 74°F | ||||
| Lowest temperature | 63°F | ||||
| Highest record temperature | 86°F (2013) | ||||
| Lowest record temperature | 54°F (2009) | ||||
| Number of days at +86°F | 0 day(s) (0%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 65°F | ||||
| Lowest sea temperature | 62°F | ||||
| Highest sea temperature | 68°F | ||||
| Wind | |||||
| Wind speed | 18km/h | ||||
| Wind temperature | 63°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.2in | ||||
| Number of days with rainfall | 3 day(s) (11%) | ||||
| Record daily rainfall | 3.3in (2015) | ||||
| Other climate data | |||||
| Humidity | 81% | ||||
| Visibility | 9.6km | ||||
| Cloud cover | 22% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:15 | ||||
| Time of sunset | 18:44 | ||||
| Length of day | 12:29 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | perfect | ||||
How was the weather last september?
Here is the day by day recorded weather in Viana do Castelo in september 2024:
63°F to 72°F
63°F to 70°F
52°F to 72°F
54°F to 76°F
56°F to 70°F
52°F to 65°F
58°F to 67°F
54°F to 68°F
58°F to 72°F
59°F to 76°F
58°F to 72°F
59°F to 74°F
58°F to 74°F
58°F to 76°F
59°F to 79°F
63°F to 81°F
63°F to 77°F
61°F to 76°F
61°F to 70°F
59°F to 68°F
59°F to 70°F
59°F to 68°F
54°F to 67°F
59°F to 63°F
63°F to 67°F
65°F to 67°F
59°F to 63°F
50°F to 67°F
56°F to 68°F
61°F to 70°F
Map: other cities in Portugal in september
Cities near Viana do Castelo:
| Chafé in september | perfect weather |
| Vila Praia de Ancora in september | perfect weather |
| Esposende in september | perfect weather |
| Caminha in september | perfect weather |
| Ponte de Lima in september | perfect weather |
| Pedroso in september | perfect weather |
| Póvoa de Varzim in september | perfect weather |
| Braga in september | perfect weather |
| Vila do Conde in september | perfect weather |
| Lavra in september | perfect weather |
| Moncao in september | perfect weather |
| Guimarães in september | perfect weather |
Click over cities on the map for information about the weather in september.
Viana do Castelo
perfect weather
good
tolerable
bad
very bad
Weather data for Viana do Castelo in september:
Weather data for Viana do Castelo for september are derived from an average of the weather forecast since 2009 in Viana do Castelo. There is a margin of error and these forecasts are to be considered as general information only. The weather in Viana do Castelo can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Viana do Castelo.