St. Louis Weather Year-Round — Best Time to Visit
St. Louis, United States has mild weather year-round. The best time to visit is September (score: 89/100). Annual average high: 18.8°C, total rainfall: 1091mm.
When is the best time to visit St. Louis?
89
September is the best month to visit St. Louis with a travel score of 89/100 (Excellent).
Expect highs of 26.6°C, 7 rain days, and 10.1 hours of daily sunshine.
View September weather details →Travel Score by Month
51
Jan
57
Feb
64
Mar
73
Apr
80
May
84
Jun
85
Jul
86
Aug
89
Sep
77
Oct
64
Nov
53
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in St. Louis each month?
18.8°C
Avg High
9.2°C
Avg Low
1091mm
Annual Rain
How much rain does St. Louis get?
St. Louis receives 1091mm of rain annually. The wettest month is typically May with 129mm, while February is the driest.
What is the weather like each month in St. Louis?
January
51
5°C
Low: -4°C
8 rain days
Mixed
February
57
7°C
Low: -2°C
7 rain days
Mixed
March
64
13°C
Low: 3°C
10 rain days
Good
April
73
19°C
Low: 8°C
11 rain days
Good
May
80
24°C
Low: 14°C
13 rain days
Good
June
84
29°C
Low: 19°C
10 rain days
Excellent
July
85
31°C
Low: 22°C
10 rain days
Excellent
August
86
31°C
Low: 21°C
9 rain days
Excellent
September
Best time to visit89
27°C
Low: 17°C
7 rain days
Excellent
October
77
20°C
Low: 10°C
8 rain days
Good
November
64
13°C
Low: 4°C
8 rain days
Good
December
53
7°C
Low: -1°C
8 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31