St. Louis, MO - Detailed climate information and monthly weather forecast

Average temperature
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average UV index

A beautiful twilight view of the Gateway Arch in St. Louis, Missouri, with a distant view of the city buildings mirrored in the waterfront

The average high temperature in January:
4.4°C
The average high temperature in February:
7.2°C
The average high temperature in March:
13.3°C
The average high temperature in April:
19.7°C
The average high temperature in May:
24.6°C
The average high temperature in June:
29.5°C

The average high temperature in July:
31.7°C
The average high temperature in August:
31.1°C
The average high temperature in September:
26.8°C
The average high temperature in October:
20.3°C
The average high temperature in November:
13.1°C
The average high temperature in December:
5.8°C

The warmest month (with the highest average high temperature) is July (31.7°C).
The month with the lowest average high temperature is January (4.4°C).

The average low temperature in January:
-4.6°C
The average low temperature in February:
-2.4°C
The average low temperature in March:
2.6°C
The average low temperature in April:
8.4°C
The average low temperature in May:
14°C
The average low temperature in June:
19.3°C

The average low temperature in July:
21.7°C
The average low temperature in August:
20.8°C
The average low temperature in September:
15.9°C
The average low temperature in October:
9.4°C
The average low temperature in November:
3.4°C
The average low temperature in December:
-2.8°C

The month with the highest average low temperature is July (21.7°C).
The coldest month (with the lowest average low temperature) is January (-4.6°C).

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The average humidity in July:
68%
The average humidity in August:
70%
The average humidity in September:
71.6%
The average humidity in October:
68.7%
The average humidity in November:
72.2%
The average humidity in December:
75.8%

The month with the highest relative humidity is December (75.8%).
The month with the lowest relative humidity is April (63.5%).

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The average rainfall in January:
61mm
The average rainfall in February:
56.9mm
The average rainfall in March:
84.3mm
The average rainfall in April:
93.7mm
The average rainfall in May:
119.9mm
The average rainfall in June:
108.7mm

The average rainfall in July:
104.4mm
The average rainfall in August:
75.9mm
The average rainfall in September:
79.5mm
The average rainfall in October:
84.6mm
The average rainfall in November:
99.3mm
The average rainfall in December:
72.1mm

The wettest month (with the highest rainfall) is May (119.9mm).
The driest month (with the lowest rainfall) is February (56.9mm).

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The average rainfall days in January:
8.9 days
The average rainfall days in February:
8 days
The average rainfall days in March:
10.3 days
The average rainfall days in April:
11.3 days
The average rainfall days in May:
11.9 days
The average rainfall days in June:
10 days

The average rainfall days in July:
8.9 days
The average rainfall days in August:
8.2 days
The average rainfall days in September:
7.4 days
The average rainfall days in October:
8.7 days
The average rainfall days in November:
9.6 days
The average rainfall days in December:
9.4 days

The month with the highest number of rainy days is May (11.9 days).
The month with the lowest number of rainy days is September (7.4 days).

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The average snowfall in January:
142.2mm
The average snowfall in February:
109.2mm
The average snowfall in March:
58.4mm
The average snowfall in April:
10.2mm
The average snowfall in May:
0mm
The average snowfall in June:
0mm

The average snowfall in July:
0mm
The average snowfall in August:
0mm
The average snowfall in September:
0mm
The average snowfall in October:
0mm
The average snowfall in November:
17.8mm
The average snowfall in December:
111.8mm

The month with the highest snowfall is January (142.2mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

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The average snowfall days in January:
4.7 days
The average snowfall days in February:
3.4 days
The average snowfall days in March:
1.7 days
The average snowfall days in April:
0.3 days
The average snowfall days in May:
0 days
The average snowfall days in June:
0 days

The average snowfall days in July:
0 days
The average snowfall days in August:
0 days
The average snowfall days in September:
0 days
The average snowfall days in October:
0 days
The average snowfall days in November:
0.7 days
The average snowfall days in December:
3.7 days

The month with the highest number of snowfall days is January (4.7 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

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Months with the longest days are June and July (Average daylight: 15h).
Months with shortest days are January, November and December (Average daylight: 10h).