What’s the climate like in Saint Louis?
The current climate of Saint Louis features average monthly temperatures ranging from highs of 32°C during the day to lows of 5°C. The average yearly temperature is around 20°C. At night, temperatures in the colder months average around -4°C and in the warmer months around 21°C.
The highest temperature recorded in Saint Louis in recent years was 40°C in August 2023. The lowest daytime temperature recorded was -17°C in January 2014.
On average, Saint Louis gets 1944 mm of precipitation each year. Of this, about 36 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Best time to visit Saint Louis?
The best time to visit Saint Louis for pleasant to warm weather is April through October. There might be some rain during this period, but the temperatures are just right for exploring Saint Louis.
Climate Table of Saint Louis
The climate table of Saint Louis shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 5 | 7 | 13 | 20 | 25 | 31 | 32 | 31 | 29 | 21 | 14 | 9 |
| Temp. min (°C) | -4 | -3 | 3 | 9 | 15 | 20 | 22 | 20 | 18 | 10 | 3 | 0 |
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| Precipitation (mm) | 83 | 149 | 168 | 211 | 223 | 242 | 157 | 227 | 130 | 131 | 78 | 145 |
| Snow (cm) | 17 | 9,9 | 2,1 | 0,1 | 0 | 0 | 0 | 0 | 0 | 0 | 1,7 | 4,7 |
| UV Index | 2 | 5 | 5 | 6 | 5 | 7 | 8 | 6 | 6 | 5 | 3 | 2 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 20°C
- Highest temperature: 32°C in July
- Lowest temperature: 5°C in January
- Precipitation*: 1944 mm per year, averaging 162 mm per month
- Snowfall: 36 cm per year
- Driest months: 78 mm in November, 83 mm in January and 130 mm in September
- Wettest months: 242 mm in June, 227 mm in August and 223 mm in May
*Precipitation is measured as a combination of rain, snow, and hail
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Table of Contents
Average Temperature per Month in Saint Louis
This graph shows the average maximum temperatures per month in Saint Louis, Missouri. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Saint Louis
This graph shows how much precipitation Saint Louis, Missouri, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Saint Louis
This graph shows how much snow Saint Louis, Missouri, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Saint Louis
This graph shows the average UV index per month in Saint Louis, Missouri. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Saint Louis
This graph shows the average yearly temperature in Saint Louis, Missouri. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Saint Louis
This chart shows the total yearly precipitation in Saint Louis, Missouri, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Saint Louis
This chart shows the total yearly snowfall in Saint Louis, Missouri, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in Saint Louis
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Average Weather in Saint Louis by Month
Click on a month below to see detailed weather info for Saint Louis. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
