Casper (WY) monthly weather averages

Contents

Average daytime temperature

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

Casper average temperature chart (Celsius) Casper average temperature chart (Fahrenheit)
Average monthly temperatures in Casper (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 0.9 3.4 7.4 13.4 19.2 25.4 30.3 29 23.1 16.1 7.2 2
°F 33.6 38 45.4 56.2 66.5 77.7 86.5 84.2 73.6 61 45 35.5

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.

Casper monthly rainfall chart (mm) Casper monthly rainfall chart (inches)
Average monthly rainfall in Casper (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 13 15 23 41 55 41 33 19 24 24 19 16
inches 0.5 0.6 0.9 1.6 2.2 1.6 1.3 0.7 1 1 0.7 0.6
Rainy days 8 8 9 10 11 9 9 6 7 7 7 8

Average annual rainfall in Casper: 258.667mm (101.8 inches)

Average daily sunshine

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

Casper average daily sunshine chart
Average daily sunshine Casper
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.5 7.5 8.5 9.2 9.8 11.2 11.6 10.9 9.4 7.9 6.2 6.1

Day / night temperatures

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

Casper average minimum / maximum temperatures (Celsius) Casper average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Casper (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -10.8 -8.7 -5.8 -1.4 3.5 8 11.9 10.4 5.3 0.1 -5.4 -9.7
Max °C 1.2 3.7 7.8 13.8 19.6 25.8 30.8 29.5 23.6 16.5 7.6 2.3
Min °F 12.6 16.4 21.7 29.5 38.2 46.4 53.3 50.6 41.5 32.2 22.4 14.6
Max °F 23.4 27.5 33.8 43.2 52.7 62.4 70.3 67.8 57.9 46.9 34 25.3

Sea temperature

The graph below shows the average sea temperature.

Casper average sea temperature chart (Celsius) Casper average sea temperature chart (Fahrenheit)
Average sea temperature around Casper in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.4 9.2 9.5 10.1 11.3 13.1 15.3 17.1 16.4 14.1 11.8 10.2
°F 48.9 48.6 49 50.2 52.4 55.7 59.5 62.9 61.5 57.3 53.3 50.3

Wind speed

The graph below shows the average wind speed.

Casper average winspeed by month (km/h) Casper average winspeed by month (mph)
Average wind speed in Casper (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 25 23 22 21 19 18 16 16 17 19 21 24
mph 16 14 14 13 12 11 10 10 11 12 13 15

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.

Casper relative humidity averages
Average relative humidity in Casper
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
63% 64% 62% 58% 57% 52% 46% 44% 49% 54% 61% 64%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Casper weather stats

Casper weather statistics
Hottest month: July 30.3°C 86.5°F
Driest month: January 13mm 0.5ins
Sunniest month: August 10.9hrs
Coldest month: January 0.9°C 33.6°F
Wettest month: May 55mm 2.2ins
Warmest sea: August 17.1°C 62.8°F
Map showing location of Casper (42.86663, -106.31308) Casper map pin © Google

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