Annual mean 15°C · wettest around December · prevailing wind W
Warmest
24.5 °C
Coldest
11.9 °C
Wettest
61%
Windiest
3.8 m/s
Prevailing
W
3.3 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Viana do Castelo over the whole year is 15°C. July is the hottest month, with highs of about 24°C; January is the coldest, with lows of about 7°C. The rainy (wet) season in Viana do Castelo runs from October to April, peaking in December with a 55% chance of rain on a given day. The dry season is May to September; July is the driest month, at 13%. Winds in Viana do Castelo are highest in December, averaging 3.0 m/s (11 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Viana do Castelo come in July, when the sky is typically 45% covered; December is the cloudiest month, at 61%.
Month by month Viana do Castelo climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
12°C
7°C
10°C
50%
58%
2.8 m/s
9
0
65
February
14°C
8°C
11°C
46%
58%
2.6 m/s
22
0
74
March
15°C
9°C
12°C
48%
59%
2.8 m/s
26
1
74
April
18°C
11°C
15°C
44%
55%
2.6 m/s
48
3
77
May
20°C
14°C
18°C
29%
53%
2.4 m/s
70
10
75
June
21°C
15°C
20°C
23%
54%
2.4 m/s
78
17
67
July
24°C
17°C
23°C
13%
45%
2.4 m/s
77
29
53
August
24°C
16°C
24°C
14%
47%
2.3 m/s
78
33
50
September
22°C
15°C
22°C
24%
49%
2.2 m/s
83
27
57
October
20°C
13°C
19°C
42%
53%
2.4 m/s
75
10
70
November
15°C
10°C
13°C
53%
58%
2.5 m/s
39
0
78
December
13°C
9°C
11°C
55%
61%
3.0 m/s
19
0
67
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Viana do Castelo weather by season
Year round, Viana do Castelo has days of about 12°C at their warmest in January, its coolest month, and 24°C in July, its warmest; the coolest hours of the day run from 7°C to 17°C through the year, and the average temperature over the year is 15°C around the clock. Rain is most likely around December and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Viana do Castelo weather in winterDecember to February
High 13°CLow 8°CRain 50%
Winter in Viana do Castelo has typical daily highs of about 13°C and lows of about 8°C, with a 50% chance of rain on a given day.
Viana do Castelo weather in springMarch to May
High 17°CLow 11°CRain 40%
Spring in Viana do Castelo has typical daily highs of about 17°C and lows of about 11°C, with a 40% chance of rain on a given day.
Viana do Castelo weather in summerJune to August
High 23°CLow 16°CRain 17%
Summer in Viana do Castelo has typical daily highs of about 23°C and lows of about 16°C, with a 17% chance of rain on a given day.
Viana do Castelo weather in autumnSeptember to November
High 19°CLow 13°CRain 40%
Autumn in Viana do Castelo has typical daily highs of about 19°C and lows of about 13°C, with a 40% chance of rain on a given day.
When is the rainy season in Viana do Castelo?
The rainy (wet) season in Viana do Castelo runs from October to April, peaking in December with a 55% chance of rain on a given day. The dry season is May to September; July is the driest month, at 13%.
What time of year is Viana do Castelo windiest?
Winds in Viana do Castelo are highest in December, averaging 3.0 m/s (11 km/h), and lightest in September, at 2.2 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Viana do Castelo year round?
The average temperature in Viana do Castelo over the whole year is 15°C. July is the hottest month, with highs of about 24°C; January is the coldest, with lows of about 7°C.