St. Louis (MO) Weather and Climate: A Comprehensive Guide
The temperature in St. Louis can vary quite a bit throughout the year.
Temperatures can be very warm during the warmest months,
and cold during the cooler months.
It also experiences much rain/snowfall throughout the year.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
Visitors to St. Louis can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 32°C in July. In January, the coolest month of the year, temperatures drop to a chilly 5°C.
At night, you can expect cooler temperatures, with averages dropping to around -5°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
St. Louis is known for its substantial rain/snowfall, with annual precipitation reaching 1116 mm. St. Louis can be quite wet during June, receiving approximately 136 mm of precipitation over 12 rainy days. In contrast January, experiences much drier conditions, with 50 mm of snow/rainfall, spread across 8 snowy/rainy days. For more details, please visit our St. Louis Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
St. Louis can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.4 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.3 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in St. Louis.
The city experiences its highest humidity in December, reaching 74%. In April, the humidity drops to its lowest level at 63%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
overcast and rain broken clouds and chance of rain broken clouds and rainForecast for St. Louis (MO)
4 m/s
3 m/s
5 m/s
The best time of year to visit St. Louis in the United States of America
During the months of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
July has an average maximum temperature of 32°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 5°C.
June tops the wettest month list with 136 mm of rainfall.
January is the driest month with 50 mm of precipitation.
July is the sunniest month with an average of 311 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
