Olney (MD) monthly weather averages

Contents

Average daytime temperature

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

Olney average temperature chart (Celsius) Olney average temperature chart (Fahrenheit)
Average monthly temperatures in Olney (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.3 6.2 12.1 17.8 23.4 27.9 30.3 29.4 25.5 19.4 13.2 6.9
°F 39.7 43.1 53.8 64 74 82.2 86.6 85 77.9 66.9 55.8 44.4

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.

Olney monthly rainfall chart (mm) Olney monthly rainfall chart (inches)
Average monthly rainfall in Olney (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 74 71 89 83 107 94 98 100 92 83 90 85
inches 2.9 2.8 3.5 3.3 4.2 3.7 3.8 3.9 3.6 3.3 3.5 3.4
Rainy days 10 10 10 10 11 10 10 10 8 8 9 10

Average annual rainfall in Olney: 1028.4mm (404.9 inches)

Average daily sunshine

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

Olney average daily sunshine chart
Average daily sunshine Olney
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.2 6 7.1 8.1 8.8 10 9.8 9.1 7.9 7.1 5.5 4.8

Day / night temperatures

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

Olney average minimum / maximum temperatures (Celsius) Olney average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Olney (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -5.1 -3.8 1 5.8 11.4 16.2 19 18.3 14.2 7.5 2.8 -2.3
Max °C 4.5 6.4 12.4 18.1 23.7 28.2 30.6 29.7 25.8 19.7 13.5 7.1
Min °F 22.8 25.2 33.8 42.4 52.4 61.2 66.2 64.9 57.6 45.5 37 27.9
Max °F 31.5 34.3 44.1 53.4 63.5 72 76.6 75.2 68 56.5 46.6 36.3

Sea temperature

The graph below shows the average sea temperature.

Olney average sea temperature chart (Celsius) Olney average sea temperature chart (Fahrenheit)
Average sea temperature around Olney in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.7 1 1.6 5 10.3 17 22.3 23.6 21.4 16.6 11.2 6.3
°F 36.8 33.8 35 41 50.5 62.6 72.2 74.6 70.6 61.8 52.2 43.4

Wind speed

The graph below shows the average wind speed.

Olney average winspeed by month (km/h) Olney average winspeed by month (mph)
Average wind speed in Olney (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 13 15 15
mph 10 10 11 11 9 9 8 8 8 8 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.

Olney relative humidity averages
Average relative humidity in Olney
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 63% 61% 60% 67% 69% 70% 72% 72% 70% 67% 67%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Olney weather stats

Olney weather statistics
Hottest month: July 30.3°C 86.5°F
Driest month: February 71mm 2.8ins
Sunniest month: June 10hrs
Coldest month: January 4.3°C 39.7°F
Wettest month: May 107mm 4.2ins
Warmest sea: August 23.6°C 74.5°F
Map showing location of Olney (39.15316, -77.06692) Olney map pin © Google

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