Gillette (WY) monthly weather averages

Contents

Average daytime temperature

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

Gillette average temperature chart (Celsius) Gillette average temperature chart (Fahrenheit)
Average monthly temperatures in Gillette (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -0 3 7.3 13.6 19.4 25 30 28.9 22.5 16 6.6 1.2
°F 32 37.4 45.1 56.5 66.9 76.9 85.9 84 72.6 60.8 43.9 34.2

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.

Gillette monthly rainfall chart (mm) Gillette monthly rainfall chart (inches)
Average monthly rainfall in Gillette (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 14 16 21 44 70 75 35 32 31 26 18 15
inches 0.6 0.6 0.8 1.7 2.7 2.9 1.4 1.2 1.2 1 0.7 0.6
Rainy days 8 8 10 10 12 11 9 7 8 7 7 9

Average annual rainfall in Gillette: 334.867mm (131.8 inches)

Average daily sunshine

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

Gillette average daily sunshine chart
Average daily sunshine Gillette
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.9 7 8.1 8.9 9.6 11.1 11.8 11 9.3 7.6 5.7 5.6

Day / night temperatures

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

Gillette average minimum / maximum temperatures (Celsius) Gillette average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Gillette (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -12.5 -9.7 -6.2 -1.2 4.3 8.9 12.4 10.9 5.5 0 -6.4 -11.3
Max °C 0.3 3.3 7.6 14 19.8 25.4 30.4 29.3 23 16.4 7 1.5
Min °F 9.5 14.5 20.8 29.9 39.7 47.9 54.3 51.6 41.8 32 20.6 11.7
Max °F 21 26.2 33.3 43.5 53.6 62.8 70.5 68.2 57.6 46.8 32.5 23.2

Sea temperature

The graph below shows the average sea temperature.

Gillette average sea temperature chart (Celsius) Gillette average sea temperature chart (Fahrenheit)
Average sea temperature around Gillette in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.2 8 8.3 8.9 10.1 12 14.2 16.3 15.5 12.9 10.6 8.9
°F 46.8 46.5 46.9 48.1 50.2 53.5 57.6 61.3 59.8 55.3 51 48.1

Wind speed

The graph below shows the average wind speed.

Gillette average winspeed by month (km/h) Gillette average winspeed by month (mph)
Average wind speed in Gillette (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 20 19 20 20 19 17 16 16 16 17 18 19
mph 12 12 12 13 12 10 10 10 10 11 11 12

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.

Gillette relative humidity averages
Average relative humidity in Gillette
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
65% 66% 64% 58% 59% 58% 50% 48% 53% 57% 64% 66%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Gillette weather stats

Gillette weather statistics
Hottest month: July 30°C 86°F
Driest month: January 14mm 0.6ins
Sunniest month: August 11hrs
Coldest month: January -0°C 32°F
Wettest month: June 75mm 3ins
Warmest sea: August 16.3°C 61.3°F
Map showing location of Gillette (44.29109, -105.50222) Gillette map pin © Google

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