July weather forecast and Climate
St. Louis, MO US

• The average high temperature in July: 31.7°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 July: 21.7°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).

• The average humidity in July: 68%

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

• The average rainfall in July: 104.4mm

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

• The average rainfall days in July: 8.9 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).

• The average snowfall in July: 0mm

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

• The average snowfall days in July: 0 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).

• The average daylight in July: 15h

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

• The average sunshine in July: 10h

The month with most sunshine is July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 4.2h).

• The average UV index in July: 9

Months with the highest UV index are June, July and August (UV index 9).
Months with the lowest UV index are January and December (UV index 2).