Annual mean 12°C · wettest around November · prevailing wind W
Warmest
21.5 °C
Coldest
6.3 °C
Wettest
24%
Windiest
7.3 m/s
Prevailing
W
6.2 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 Calais over the whole year is 12°C. August is the hottest month, with highs of about 21°C; January is the coldest, with lows of about 5°C. Calais has no sharply defined rainy season: the chance of rain on a given day runs from 7% in July, the driest month, to 19% in November, the wettest. Winds in Calais are highest in February, averaging 6.2 m/s (22 km/h), and lightest in September, at 4.7 m/s (17 km/h). The prevailing wind is from the W. The clearest skies in Calais come in August, when the sky is typically 80% covered; December is the cloudiest month, at 90%.
Month by month Calais 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
1°C
15%
87%
5.9 m/s
0
0
11
February
8°C
5°C
2°C
14%
87%
6.2 m/s
0
0
19
March
10°C
6°C
4°C
13%
86%
5.8 m/s
2
0
30
April
12°C
7°C
7°C
9%
82%
4.9 m/s
9
0
54
May
16°C
11°C
12°C
8%
85%
4.9 m/s
27
1
78
June
19°C
14°C
16°C
9%
86%
4.8 m/s
57
5
80
July
21°C
16°C
18°C
7%
84%
4.8 m/s
76
8
80
August
21°C
16°C
19°C
9%
80%
4.8 m/s
76
10
75
September
19°C
14°C
16°C
13%
84%
4.7 m/s
58
5
79
October
15°C
11°C
11°C
18%
86%
5.0 m/s
23
0
77
November
10°C
8°C
6°C
19%
88%
5.6 m/s
0
0
42
December
8°C
6°C
3°C
18%
90%
5.7 m/s
0
0
19
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 Calais weather by season
Year round, Calais has days of about 7°C at their warmest in January, its coolest month, and 21°C in August, its warmest; the coolest hours of the day run from 5°C to 16°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around November 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.
Calais weather in winterDecember to February
High 8°CLow 5°CRain 15%
Winter in Calais has typical daily highs of about 8°C and lows of about 5°C, with a 15% chance of rain on a given day.
Calais weather in springMarch to May
High 13°CLow 8°CRain 10%
Spring in Calais has typical daily highs of about 13°C and lows of about 8°C, with a 10% chance of rain on a given day.
Calais weather in summerJune to August
High 20°CLow 15°CRain 9%
Summer in Calais has typical daily highs of about 20°C and lows of about 15°C, with a 9% chance of rain on a given day.
Calais weather in autumnSeptember to November
High 15°CLow 11°CRain 17%
Autumn in Calais has typical daily highs of about 15°C and lows of about 11°C, with a 17% chance of rain on a given day.
When is the rainy season in Calais?
Calais has no sharply defined rainy season: the chance of rain on a given day runs from 7% in July, the driest month, to 19% in November, the wettest.
What time of year is Calais windiest?
Winds in Calais are highest in February, averaging 6.2 m/s (22 km/h), and lightest in September, at 4.7 m/s (17 km/h). The prevailing wind is from the W.
What is the average temperature in Calais year round?
The average temperature in Calais over the whole year is 12°C. August is the hottest month, with highs of about 21°C; January is the coldest, with lows of about 5°C.