Annual mean 11°C · wettest around December · prevailing wind W
Warmest
25.1 °C
Coldest
2.3 °C
Wettest
23%
Windiest
3.5 m/s
Prevailing
W
2.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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-Louis over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about 1°C. Saint-Louis has no sharply defined rainy season: the chance of rain on a given day runs from 12% in September, the driest month, to 20% in December, the wettest. Winds in Saint-Louis are highest in January, averaging 2.7 m/s (10 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Saint-Louis come in August, when the sky is typically 60% covered; December is the cloudiest month, at 81%.
Month by month Saint-Louis 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
4°C
1°C
-0°C
20%
79%
2.7 m/s
0
0
11
February
7°C
3°C
3°C
16%
73%
2.7 m/s
1
0
27
March
10°C
3°C
6°C
16%
69%
2.6 m/s
7
0
47
April
14°C
6°C
11°C
16%
69%
2.2 m/s
32
1
69
May
18°C
11°C
15°C
19%
71%
2.1 m/s
55
6
76
June
23°C
16°C
22°C
17%
64%
2.0 m/s
74
32
52
July
25°C
17°C
24°C
13%
62%
1.9 m/s
74
42
43
August
24°C
16°C
24°C
13%
60%
1.8 m/s
64
46
39
September
20°C
12°C
19°C
12%
64%
1.7 m/s
71
21
67
October
15°C
9°C
13°C
14%
71%
1.9 m/s
41
1
81
November
8°C
5°C
5°C
18%
79%
2.2 m/s
2
0
37
December
5°C
2°C
1°C
20%
81%
2.6 m/s
0
0
14
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-Louis weather by season
Year round, Saint-Louis has days of about 4°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from 1°C to 17°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 September. 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-Louis weather in winterDecember to February
High 5°CLow 2°CRain 19%
Winter in Saint-Louis has typical daily highs of about 5°C and lows of about 2°C, with a 19% chance of rain on a given day.
Saint-Louis weather in springMarch to May
High 14°CLow 7°CRain 17%
Spring in Saint-Louis has typical daily highs of about 14°C and lows of about 7°C, with a 17% chance of rain on a given day.
Saint-Louis weather in summerJune to August
High 24°CLow 16°CRain 14%
Summer in Saint-Louis has typical daily highs of about 24°C and lows of about 16°C, with a 14% chance of rain on a given day.
Saint-Louis weather in autumnSeptember to November
High 14°CLow 9°CRain 15%
Autumn in Saint-Louis has typical daily highs of about 14°C and lows of about 9°C, with a 15% chance of rain on a given day.
When is the rainy season in Saint-Louis?
Saint-Louis has no sharply defined rainy season: the chance of rain on a given day runs from 12% in September, the driest month, to 20% in December, the wettest.
What time of year is Saint-Louis windiest?
Winds in Saint-Louis are highest in January, averaging 2.7 m/s (10 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Saint-Louis year round?
The average temperature in Saint-Louis over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about 1°C.