Annual mean 12°C · wettest around November · prevailing wind W
Warmest
21.9 °C
Coldest
5.7 °C
Wettest
28%
Windiest
6.9 m/s
Prevailing
W
5.7 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 Saint-Omer over the whole year is 12°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C. Saint-Omer has no sharply defined rainy season: the chance of rain on a given day runs from 12% in July, the driest month, to 25% in November, the wettest. Winds in Saint-Omer are highest in February, averaging 5.7 m/s (21 km/h), and lightest in August, at 4.3 m/s (15 km/h). The prevailing wind is from the W. The clearest skies in Saint-Omer come in August, when the sky is typically 73% covered; December is the cloudiest month, at 86%.
Month by month Saint-Omer 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
20%
84%
5.4 m/s
0
0
10
February
8°C
5°C
2°C
18%
80%
5.7 m/s
0
0
20
March
10°C
6°C
4°C
17%
79%
5.3 m/s
2
0
33
April
13°C
7°C
8°C
13%
74%
4.6 m/s
11
0
56
May
16°C
11°C
12°C
13%
76%
4.5 m/s
30
1
78
June
19°C
14°C
17°C
14%
76%
4.4 m/s
61
8
78
July
21°C
16°C
18°C
12%
76%
4.4 m/s
77
10
77
August
22°C
16°C
19°C
15%
73%
4.3 m/s
77
12
72
September
19°C
14°C
16°C
18%
76%
4.3 m/s
62
6
78
October
15°C
11°C
12°C
23%
80%
4.5 m/s
25
0
78
November
10°C
7°C
6°C
25%
83%
5.0 m/s
1
0
41
December
8°C
6°C
2°C
23%
86%
5.3 m/s
0
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 Saint-Omer weather by season
Year round, Saint-Omer has days of about 6°C at their warmest in January, its coolest month, and 22°C in August, 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 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.
Saint-Omer weather in winterDecember to February
High 7°CLow 5°CRain 20%
Winter in Saint-Omer has typical daily highs of about 7°C and lows of about 5°C, with a 20% chance of rain on a given day.
Saint-Omer weather in springMarch to May
High 13°CLow 8°CRain 14%
Spring in Saint-Omer has typical daily highs of about 13°C and lows of about 8°C, with a 14% chance of rain on a given day.
Saint-Omer weather in summerJune to August
High 21°CLow 16°CRain 14%
Summer in Saint-Omer has typical daily highs of about 21°C and lows of about 16°C, with a 14% chance of rain on a given day.
Saint-Omer weather in autumnSeptember to November
High 15°CLow 11°CRain 22%
Autumn in Saint-Omer has typical daily highs of about 15°C and lows of about 11°C, with a 22% chance of rain on a given day.
When is the rainy season in Saint-Omer?
Saint-Omer has no sharply defined rainy season: the chance of rain on a given day runs from 12% in July, the driest month, to 25% in November, the wettest.
What time of year is Saint-Omer windiest?
Winds in Saint-Omer are highest in February, averaging 5.7 m/s (21 km/h), and lightest in August, at 4.3 m/s (15 km/h). The prevailing wind is from the W.
What is the average temperature in Saint-Omer year round?
The average temperature in Saint-Omer over the whole year is 12°C. August is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C.