Annual mean 11°C · wettest around December · prevailing wind W
Warmest
21.4 °C
Coldest
5.7 °C
Wettest
25%
Windiest
6.1 m/s
Prevailing
W
5.1 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 Costessey over the whole year is 11°C. August is the hottest month, with highs of about 21°C; January is the coldest, with lows of about 4°C. Costessey has no sharply defined rainy season: the chance of rain on a given day runs from 9% in April, the driest month, to 19% in December, the wettest. Winds in Costessey are highest in February, averaging 4.9 m/s (18 km/h), and lightest in September, at 3.5 m/s (13 km/h). The prevailing wind is from the W. The clearest skies in Costessey come in August, when the sky is typically 51% covered; December is the cloudiest month, at 65%.
Month by month Costessey 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
6°C
4°C
1°C
13%
61%
4.5 m/s
0
0
11
February
8°C
5°C
3°C
16%
61%
4.9 m/s
1
0
23
March
10°C
5°C
5°C
14%
59%
4.5 m/s
2
0
36
April
12°C
6°C
7°C
9%
52%
4.7 m/s
7
0
50
May
15°C
10°C
11°C
12%
54%
4.3 m/s
27
0
76
June
19°C
13°C
16°C
11%
53%
4.3 m/s
56
6
79
July
21°C
15°C
18°C
12%
55%
3.8 m/s
74
10
77
August
21°C
15°C
18°C
10%
51%
3.7 m/s
76
8
79
September
19°C
13°C
16°C
13%
52%
3.5 m/s
60
6
79
October
15°C
10°C
11°C
17%
55%
4.0 m/s
21
0
77
November
10°C
7°C
6°C
17%
60%
4.1 m/s
1
0
44
December
7°C
5°C
3°C
19%
65%
4.5 m/s
1
0
20
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 Costessey weather by season
Year round, Costessey has days of about 6°C at their warmest in January, its coolest month, and 21°C in August, its warmest; the coolest hours of the day run from 4°C to 15°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around April. 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.
Costessey weather in winterDecember to February
High 7°CLow 5°CRain 16%
Winter in Costessey has typical daily highs of about 7°C and lows of about 5°C, with a 16% chance of rain on a given day.
Costessey weather in springMarch to May
High 12°CLow 7°CRain 12%
Spring in Costessey has typical daily highs of about 12°C and lows of about 7°C, with a 12% chance of rain on a given day.
Costessey weather in summerJune to August
High 20°CLow 14°CRain 11%
Summer in Costessey has typical daily highs of about 20°C and lows of about 14°C, with a 11% chance of rain on a given day.
Costessey weather in autumnSeptember to November
High 14°CLow 10°CRain 16%
Autumn in Costessey has typical daily highs of about 14°C and lows of about 10°C, with a 16% chance of rain on a given day.
When is the rainy season in Costessey?
Costessey has no sharply defined rainy season: the chance of rain on a given day runs from 9% in April, the driest month, to 19% in December, the wettest.
What time of year is Costessey windiest?
Winds in Costessey are highest in February, averaging 4.9 m/s (18 km/h), and lightest in September, at 3.5 m/s (13 km/h). The prevailing wind is from the W.
What is the average temperature in Costessey year round?
The average temperature in Costessey over the whole year is 11°C. August is the hottest month, with highs of about 21°C; January is the coldest, with lows of about 4°C.