Saint Louis (MO) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Saint Louis

Saint Louis average temperature chart (Celsius) Saint Louis average temperature chart (Fahrenheit)
Average monthly temperatures in Saint Louis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 3.1 5.8 12.3 19.2 24.3 29.3 31.4 30.3 26.3 20.3 12.5 5.4
°F 37.5 42.5 54.2 66.6 75.8 84.7 88.6 86.6 79.3 68.5 54.4 41.7

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Saint Louis monthly rainfall chart (mm) Saint Louis monthly rainfall chart (inches)
Average monthly rainfall in Saint Louis (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 46 55 84 95 103 95 95 75 78 67 80 68
inches 1.8 2.2 3.3 3.7 4 3.7 3.7 3 3.1 2.6 3.2 2.7
Rainy days 9 9 11 11 10 9 8 8 8 8 10 10

Average annual rainfall in Saint Louis: 889.733mm (350.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Saint Louis

Saint Louis average daily sunshine chart
Average daily sunshine Saint Louis
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.1 6.9 8 9.3 10.5 10.8 9.5 8.5 7.4 5.2 4.7

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Saint Louis average minimum / maximum temperatures (Celsius) Saint Louis average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Saint Louis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -6.5 -4.1 1.6 7.7 12.8 18.1 20.5 19 15.1 8.5 2.7 -3.4
Max °C 3.3 6.1 12.6 19.5 24.6 29.6 31.7 30.6 26.6 20.6 12.7 5.6
Min °F 20.3 24.7 34.9 45.9 55 64.5 68.9 66.2 59.1 47.2 36.9 25.9
Max °F 29.1 33.8 44.8 56.5 65.7 74.8 79 76.6 69.4 58.1 45.9 34

Sea temperature

The graph below shows the average sea temperature.

Saint Louis average sea temperature chart (Celsius) Saint Louis average sea temperature chart (Fahrenheit)
Average sea temperature around Saint Louis in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.3 9.8 10.4 11.8 14 16.6 19.7 22.6 21.2 17.1 13.9 11.7
°F 50.5 49.7 50.7 53.2 57.1 61.9 67.5 72.7 70.2 62.8 56.9 53

Wind speed

The graph below shows the average wind speed.

Saint Louis average winspeed by month (km/h) Saint Louis average winspeed by month (mph)
Average wind speed in Saint Louis (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 19 20 19 16 16 14 13 14 16 18 18
mph 12 12 13 12 10 10 9 8 9 10 11 11

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Saint Louis relative humidity averages
Average relative humidity in Saint Louis
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
73% 72% 68% 64% 67% 67% 68% 70% 72% 69% 72% 76%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Saint Louis weather stats

Saint Louis weather statistics
Hottest month: July 31.4°C 88.5°F
Driest month: January 46mm 1.8ins
Sunniest month: July 10.8hrs
Coldest month: January 3.1°C 37.6°F
Wettest month: May 103mm 4.1ins
Warmest sea: August 22.6°C 72.7°F
Map showing location of Saint Louis (38.62727, -90.19789) Saint Louis map pin © Google

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