Ballwin (MO) monthly weather averages

Contents

Average daytime temperature

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

Ballwin average temperature chart (Celsius) Ballwin average temperature chart (Fahrenheit)
Average monthly temperatures in Ballwin (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 3.1 5.7 12.4 19.2 24.1 29 31.4 30.4 26.3 20.2 12.5 5.3
°F 37.5 42.3 54.3 66.6 75.3 84.2 88.6 86.7 79.4 68.3 54.5 41.6

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.

Ballwin monthly rainfall chart (mm) Ballwin monthly rainfall chart (inches)
Average monthly rainfall in Ballwin (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 45 52 86 97 106 95 93 79 84 70 82 69
inches 1.8 2.1 3.4 3.8 4.2 3.7 3.7 3.1 3.3 2.7 3.2 2.7
Rainy days 8 9 11 11 11 9 8 8 8 9 10 10

Average annual rainfall in Ballwin: 906mm (356.7 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Ballwin

Ballwin average daily sunshine chart
Average daily sunshine Ballwin
  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 10.7 9.5 8.4 7.4 5.3 4.7

Day / night temperatures

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

Ballwin average minimum / maximum temperatures (Celsius) Ballwin average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Ballwin (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -6.9 -4.6 1.4 7.5 12.5 17.8 20.3 19 14.8 8.2 2.3 -4
Max °C 3.3 6 12.7 19.5 24.4 29.3 31.7 30.7 26.6 20.5 12.8 5.6
Min °F 19.6 23.7 34.4 45.5 54.4 64 68.5 66.1 58.6 46.7 36.1 24.9
Max °F 28.8 33.3 44.6 56.3 65.1 74.3 78.8 76.6 69.3 57.7 45.5 33.4

Sea temperature

The graph below shows the average sea temperature.

Ballwin average sea temperature chart (Celsius) Ballwin average sea temperature chart (Fahrenheit)
Average sea temperature around Ballwin 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.

Ballwin average winspeed by month (km/h) Ballwin average winspeed by month (mph)
Average wind speed in Ballwin (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 19 21 20 16 16 14 14 14 16 18 18
mph 12 12 13 12 10 10 9 9 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.

Ballwin relative humidity averages
Average relative humidity in Ballwin
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
72% 72% 68% 64% 68% 68% 69% 70% 72% 69% 72% 75%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Ballwin weather stats

Ballwin weather statistics
Hottest month: July 31.4°C 88.5°F
Driest month: January 45mm 1.8ins
Sunniest month: July 10.7hrs
Coldest month: January 3.1°C 37.6°F
Wettest month: May 106mm 4.2ins
Warmest sea: August 22.6°C 72.7°F
Map showing location of Ballwin (38.59505, -90.54623) Ballwin map pin © Google

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