Mandan (ND) monthly weather averages

Average daytime temperature

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

Mandan average temperature chart (Celsius) Mandan average temperature chart (Fahrenheit)
Average monthly temperatures in Mandan (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -6.8 -3.2 3.3 12.3 19.5 24.8 28.8 27.8 21.1 14.4 3.7 -4.4
°F 19.7 26.2 37.9 54.2 67.1 76.7 83.8 82 70 57.9 38.6 24

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.

Mandan monthly rainfall chart (mm) Mandan monthly rainfall chart (inches)
Average monthly rainfall in Mandan (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 10 9 16 38 59 81 63 49 37 25 13 9
inches 0.4 0.3 0.6 1.5 2.3 3.2 2.5 1.9 1.5 1 0.5 0.4
Rainy days 8 7 8 9 10 11 9 8 7 6 6 8

Average annual rainfall in Mandan: 353.533mm (139.2 inches)

Average daily sunshine

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

Mandan average daily sunshine chart
Average daily sunshine Mandan
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.5 6.1 7.8 8.8 10.2 11.4 12.3 11 8.9 6.9 4.7 4.6

Day / night temperatures

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

Mandan average minimum / maximum temperatures (Celsius) Mandan average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Mandan (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -18.5 -14.7 -8 -0.7 5.8 11.1 13.9 12.5 6.4 0.4 -7.8 -15.7
Max °C -6.6 -3 3.6 12.7 19.9 25.2 29.2 28.2 21.5 14.8 4 -4.2
Min °F -1.2 5.6 17.7 30.8 42.4 51.9 56.9 54.4 43.4 32.8 18.1 3.8
Max °F 9.5 16.2 28 42.8 55 64.6 70.7 68.5 57 45.7 28.6 14.2

Sea temperature

The graph below shows the average sea temperature.

Mandan average sea temperature chart (Celsius) Mandan average sea temperature chart (Fahrenheit)
Average sea temperature around Mandan in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.6 6.4 6.7 7.5 8.7 10.7 13.2 15.9 14.9 11.8 9.1 7.3
°F 43.9 43.6 44.1 45.5 47.7 51.2 55.7 60.5 58.7 53.2 48.3 45.2

Wind speed

The graph below shows the average wind speed.

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

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.

Mandan relative humidity averages
Average relative humidity in Mandan
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
71% 72% 70% 62% 60% 65% 62% 61% 64% 64% 72% 75%