Harrow on the Hill monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Harrow on the Hill

Harrow on the Hill average temperature chart (Celsius) Harrow on the Hill average temperature chart (Fahrenheit)
Average monthly temperatures in Harrow on the Hill (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.5 6.9 9.6 12.4 16.3 19.6 21.6 21.3 18.6 14.7 9.7 7.3
°F 43.7 44.4 49.3 54.4 61.3 67.3 70.9 70.3 65.5 58.4 49.4 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.

Harrow on the Hill monthly rainfall chart (mm) Harrow on the Hill monthly rainfall chart (inches)
Average monthly rainfall in Harrow on the Hill (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 60 41 54 50 56 55 49 56 55 63 63 64
inches 2.4 1.6 2.1 2 2.2 2.2 1.9 2.2 2.2 2.5 2.5 2.5
Rainy days 18 13 15 15 14 12 11 12 12 14 16 16

Average annual rainfall in Harrow on the Hill: 716.366mm (282 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Harrow on the Hill

Harrow on the Hill average daily sunshine chart
Average daily sunshine Harrow on the Hill
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.9 2.6 3.8 5.2 6.7 7.2 6.7 6.5 5.2 3.8 2.5 1.7

Day / night temperatures

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

Harrow on the Hill average minimum / maximum temperatures (Celsius) Harrow on the Hill average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Harrow on the Hill (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.2 1.2 2.4 4.2 7.1 10.2 12.2 11.9 10 7.4 3.6 2
Max °C 6.7 7.1 9.8 12.7 16.5 19.9 21.9 21.5 18.8 14.9 9.8 7.5
Min °F 34.1 34.1 36.3 39.5 44.8 50.3 53.9 53.4 50 45.2 38.5 35.5
Max °F 39 39.4 43 47.1 53.2 59 62.6 62.1 57.9 52 44.1 40.5

Sea temperature

The graph below shows the average sea temperature.

Harrow on the Hill average sea temperature chart (Celsius) Harrow on the Hill average sea temperature chart (Fahrenheit)
Average sea temperature around Harrow on the Hill in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.9 7.9 7.9 9.1 11 13.3 15.5 17 17 15.6 13.2 10.7
°F 48 46.2 46.2 48.4 51.8 55.9 59.9 62.6 62.6 60 55.7 51.3

Wind speed

The graph below shows the average wind speed.

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

Harrow on the Hill relative humidity averages
Average relative humidity in Harrow on the Hill
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
90% 86% 82% 78% 77% 76% 76% 78% 82% 87% 90% 91%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Harrow on the Hill weather stats

Harrow on the Hill weather statistics
Hottest month: July 21.6°C 70.9°F
Driest month: February 41mm 1.6ins
Sunniest month: August 6.5hrs
Coldest month: January 6.5°C 43.7°F
Wettest month: December 64mm 2.5ins
Warmest sea: August 17°C 62.6°F
Map showing location of Harrow on the Hill (51.57142, -0.33371) Harrow on the Hill map pin © Google

Locations nearby

Top United Kingdom locations