Severn (MD) monthly weather averages

Average daytime temperature

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

Severn average temperature chart (Celsius) Severn average temperature chart (Fahrenheit)
Average monthly temperatures in Severn (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.7 6.6 12.5 18 23.4 28.1 30.4 29.6 25.8 19.7 13.6 7.3
°F 40.5 43.9 54.4 64.4 74.1 82.5 86.7 85.2 78.4 67.5 56.4 45.2

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.

Severn monthly rainfall chart (mm) Severn monthly rainfall chart (inches)
Average monthly rainfall in Severn (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 77 76 93 84 103 94 103 107 90 81 89 87
inches 3 3 3.6 3.3 4.1 3.7 4.1 4.2 3.5 3.2 3.5 3.4
Rainy days 10 9 10 10 11 9 10 9 7 7 9 9

Average annual rainfall in Severn: 1045.333mm (411.5 inches)

Average daily sunshine

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

Severn average daily sunshine chart
Average daily sunshine Severn
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.5 6.2 7.4 8.2 8.8 10 9.9 9.1 8 7.2 5.7 5.1

Day / night temperatures

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

Severn average minimum / maximum temperatures (Celsius) Severn average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Severn (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -5.2 -3.9 0.9 5.5 11.1 16.1 18.7 18.2 14.2 7.4 2.6 -2.4
Max °C 5 6.9 12.8 18.3 23.7 28.4 30.7 29.9 26.1 20.1 13.9 7.6
Min °F 22.7 25.1 33.5 41.9 52 60.9 65.7 64.7 57.5 45.2 36.6 27.8
Max °F 31.8 34.7 44.2 53.4 63.3 72 76.5 75.2 68.2 56.7 46.8 36.7

Sea temperature

The graph below shows the average sea temperature.

Severn average sea temperature chart (Celsius) Severn average sea temperature chart (Fahrenheit)
Average sea temperature around Severn in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 1 -0.8 -0.1 3.7 9.4 16.4 21.9 23.4 21.1 16.1 10.6 5.2
°F 33.9 30.5 31.9 38.7 48.8 61.4 71.5 74.1 70 61.1 51 41.4

Wind speed

The graph below shows the average wind speed.

Severn average winspeed by month (km/h) Severn average winspeed by month (mph)
Average wind speed in Severn (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 17 18 17 15 14 13 13 13 14 16 16
mph 10 11 11 11 9 9 8 8 8 9 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.

Severn relative humidity averages
Average relative humidity in Severn
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
63% 62% 60% 59% 66% 68% 69% 71% 71% 70% 67% 66%