St. Louis Weather Averages

Climate averages for St. Louis based on 10 years of historical data.

Average St. Louis temperatures by month

Avg high

5°

J

7°

F

13°

M

18°

A

24°

M

30°

J

31°

J

30°

A

28°

S

21°

O

13°

N

8°

D

Avg low

-3°

J

-2°

F

4°

M

8°

A

15°

M

20°

J

21°

J

20°

A

18°

S

11°

O

4°

N

0°

D

Average rainfall in St. Louis by month

Rainfall (mm)

86

J

74

F

158

M

155

A

165

M

136

J

178

J

159

A

127

S

101

O

97

N

93

D

Sunshine hours in St. Louis by month

Sunshine (h/day)

3

J

3

F

3

M

4

A

4

M

5

J

4

J

4

A

5

S

5

O

4

N

3

D

Humidity in St. Louis by month

Average humidity

73%

J

73%

F

71%

M

71%

A

75%

M

71%

J

75%

J

73%

A

67%

S

63%

O

67%

N

71%

D

Month-by-month averages

Month	Avg High	Avg Low	Rainfall	Sunshine
Vejr i Januar	5°C	-3°C	86 mm	2.7h
Vejr i Februar	7°C	-2°C	74 mm	3.1h
Vejr i Marts	13°C	4°C	158 mm	3.2h
Vejr i April	18°C	8°C	155 mm	3.9h
Vejr i Maj	24°C	15°C	165 mm	3.9h
Vejr i Juni	30°C	20°C	136 mm	5.3h
Vejr i Juli	31°C	21°C	178 mm	4.1h
Vejr i August	30°C	20°C	159 mm	4.3h
Vejr i September	28°C	18°C	127 mm	5.0h
Vejr i Oktober	21°C	11°C	101 mm	4.8h
Vejr i November	13°C	4°C	97 mm	3.9h
Vejr i December	8°C	0°C	93 mm	3.0h