Belle Fourche (SD) monthly weather averages

Average daytime temperature

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

Belle Fourche average temperature chart (Celsius) Belle Fourche average temperature chart (Fahrenheit)
Average monthly temperatures in Belle Fourche (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -0.4 2.5 7.1 14.2 20.1 25.8 30.7 29.7 22.8 16.3 7 0.8
°F 31.2 36.5 44.8 57.5 68.2 78.5 87.3 85.5 73.1 61.3 44.5 33.5

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.

Belle Fourche monthly rainfall chart (mm) Belle Fourche monthly rainfall chart (inches)
Average monthly rainfall in Belle Fourche (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 8 10 19 41 68 70 47 36 31 25 13 11
inches 0.3 0.4 0.8 1.6 2.7 2.8 1.9 1.4 1.2 1 0.5 0.4
Rainy days 8 7 9 10 11 11 9 7 7 6 6 8

Average annual rainfall in Belle Fourche: 320.233mm (126.1 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Belle Fourche

Belle Fourche average daily sunshine chart
Average daily sunshine Belle Fourche
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.8 6.8 8.1 8.9 9.6 11.3 11.9 11.3 9.4 7.7 5.6 5.4

Day / night temperatures

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

Belle Fourche average minimum / maximum temperatures (Celsius) Belle Fourche average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Belle Fourche (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -12.5 -9.8 -5.7 0.1 5.8 11 14.7 13.3 7.4 1.8 -5.3 -10.9
Max °C -0.1 2.8 7.5 14.5 20.5 26.2 31.1 30.1 23.2 16.7 7.3 1.1
Min °F 9.6 14.4 21.8 32.2 42.4 51.8 58.5 55.9 45.3 35.2 22.6 12.4
Max °F 20.7 25.7 33.6 45.1 55.6 65.5 73.2 71.1 59.5 48.6 33.8 23.2

Sea temperature

The graph below shows the average sea temperature.

Belle Fourche average sea temperature chart (Celsius) Belle Fourche average sea temperature chart (Fahrenheit)
Average sea temperature around Belle Fourche in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8 7.9 8.1 8.9 10.1 12 14.3 16.6 15.7 13 10.5 8.8
°F 46.5 46.1 46.7 48 50.2 53.6 57.8 61.8 60.3 55.4 50.9 47.8

Wind speed

The graph below shows the average wind speed.

Belle Fourche average winspeed by month (km/h) Belle Fourche average winspeed by month (mph)
Average wind speed in Belle Fourche (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 18 20 21 20 18 16 17 17 18 17 18
mph 12 11 13 13 12 11 10 10 11 11 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.

Belle Fourche relative humidity averages
Average relative humidity in Belle Fourche
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
67% 67% 65% 59% 60% 60% 54% 51% 54% 57% 65% 68%