Annual mean 11°C · wettest around March · prevailing wind SW
Warmest
21.2 °C
Coldest
6.0 °C
Wettest
61%
Windiest
5.9 m/s
Prevailing
SW
5.0 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 Portishead over the whole year is 11°C. July is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 4°C. Portishead has no sharply defined rainy season: the chance of rain on a given day runs from 30% in July, the driest month, to 46% in March, the wettest. Winds in Portishead are highest in February, averaging 4.8 m/s (17 km/h), and lightest in November, at 3.8 m/s (14 km/h). The prevailing wind is from the SW. The clearest skies in Portishead come in May, when the sky is typically 54% covered; December is the cloudiest month, at 71%.
Month by month Portishead 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
7°C
5°C
2°C
34%
67%
4.3 m/s
0
0
14
February
7°C
4°C
2°C
38%
67%
4.8 m/s
0
0
15
March
9°C
5°C
4°C
46%
67%
4.7 m/s
0
0
27
April
12°C
7°C
7°C
34%
59%
4.2 m/s
7
0
50
May
16°C
11°C
13°C
40%
54%
3.9 m/s
31
0
77
June
19°C
14°C
16°C
34%
58%
4.2 m/s
53
4
77
July
21°C
16°C
19°C
30%
57%
3.9 m/s
72
12
71
August
19°C
14°C
17°C
44%
61%
4.0 m/s
66
4
76
September
18°C
13°C
15°C
40%
60%
3.9 m/s
48
2
78
October
14°C
11°C
11°C
38%
66%
4.1 m/s
16
0
75
November
10°C
7°C
6°C
37%
68%
3.8 m/s
0
0
39
December
8°C
6°C
4°C
37%
71%
4.1 m/s
0
0
24
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 Portishead weather by season
Year round, Portishead has days of about 7°C at their warmest in January, its coolest month, and 21°C in July, its warmest; the coolest hours of the day run from 4°C to 16°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around March 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.
Portishead weather in winterDecember to February
High 7°CLow 5°CRain 36%
Winter in Portishead has typical daily highs of about 7°C and lows of about 5°C, with a 36% chance of rain on a given day.
Portishead weather in springMarch to May
High 12°CLow 8°CRain 40%
Spring in Portishead has typical daily highs of about 12°C and lows of about 8°C, with a 40% chance of rain on a given day.
Portishead weather in summerJune to August
High 20°CLow 15°CRain 36%
Summer in Portishead has typical daily highs of about 20°C and lows of about 15°C, with a 36% chance of rain on a given day.
Portishead weather in autumnSeptember to November
High 14°CLow 10°CRain 38%
Autumn in Portishead has typical daily highs of about 14°C and lows of about 10°C, with a 38% chance of rain on a given day.
When is the rainy season in Portishead?
Portishead has no sharply defined rainy season: the chance of rain on a given day runs from 30% in July, the driest month, to 46% in March, the wettest.
What time of year is Portishead windiest?
Winds in Portishead are highest in February, averaging 4.8 m/s (17 km/h), and lightest in November, at 3.8 m/s (14 km/h). The prevailing wind is from the SW.
What is the average temperature in Portishead year round?
The average temperature in Portishead over the whole year is 11°C. July is the hottest month, with highs of about 21°C; February is the coldest, with lows of about 4°C.