Bethesda (MD) monthly weather averages

Contents

Average daytime temperature

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

Bethesda average temperature chart (Celsius) Bethesda average temperature chart (Fahrenheit)
Average monthly temperatures in Bethesda (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.9 6.8 12.6 18.4 23.8 28.4 30.5 29.7 26 19.9 13.8 7.4
°F 40.8 44.2 54.7 65.1 74.8 83.2 87 85.5 78.8 67.8 56.8 45.3

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.

Bethesda monthly rainfall chart (mm) Bethesda monthly rainfall chart (inches)
Average monthly rainfall in Bethesda (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 71 70 85 75 96 88 99 103 87 78 83 82
inches 2.8 2.8 3.4 3 3.8 3.5 3.9 4.1 3.4 3.1 3.3 3.2
Rainy days 10 10 10 10 11 10 10 9 8 7 9 9

Average annual rainfall in Bethesda: 979.334mm (385.6 inches)

Average daily sunshine

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

Bethesda average daily sunshine chart
Average daily sunshine Bethesda
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.2 6 7.1 8.1 8.9 10 9.7 9.1 8 7.1 5.5 4.8

Day / night temperatures

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

Bethesda average minimum / maximum temperatures (Celsius) Bethesda average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Bethesda (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -4.1 -2.8 1.9 6.8 12.4 17.5 20.2 19.5 15.4 8.7 3.8 -1.4
Max °C 5.1 7 12.9 18.7 24.1 28.7 30.8 30 26.3 20.2 14.1 7.6
Min °F 24.6 27 35.4 44.2 54.2 63.5 68.4 67 59.6 47.6 38.8 29.5
Max °F 32.9 35.8 45.3 54.9 64.8 73.6 77.9 76.5 69.4 57.9 48 37.6

Sea temperature

The graph below shows the average sea temperature.

Bethesda average sea temperature chart (Celsius) Bethesda average sea temperature chart (Fahrenheit)
Average sea temperature around Bethesda in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.2 2.6 3.3 6.7 11.8 18.2 23.2 24.2 22.1 17.3 12.2 7.7
°F 39.6 36.6 38 44.1 53.3 64.8 73.7 75.6 71.7 63.2 54 45.8

Wind speed

The graph below shows the average wind speed.

Bethesda average winspeed by month (km/h) Bethesda average winspeed by month (mph)
Average wind speed in Bethesda (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 17 17 17 15 14 13 12 13 14 15 15
mph 10 10 11 11 9 9 8 8 8 9 9 9

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.

Bethesda relative humidity averages
Average relative humidity in Bethesda
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 62% 60% 59% 67% 68% 69% 71% 72% 69% 67% 66%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Bethesda weather stats

Bethesda weather statistics
Hottest month: July 30.5°C 86.9°F
Driest month: February 70mm 2.8ins
Sunniest month: June 10hrs
Coldest month: January 4.9°C 40.8°F
Wettest month: August 103mm 4.1ins
Warmest sea: August 24.2°C 75.6°F
Map showing location of Bethesda (38.98067, -77.10026) Bethesda map pin © Google

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