Isle of Lewis monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Isle of Lewis

Isle of Lewis average temperature chart (Celsius) Isle of Lewis average temperature chart (Fahrenheit)
Average monthly temperatures in Isle of Lewis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.3 6.3 7.4 9.2 11.8 14 15 15.3 13.4 11.5 8.2 7
°F 43.3 43.3 45.3 48.5 53.2 57.1 59 59.6 56.2 52.7 46.7 44.7

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.

Isle of Lewis monthly rainfall chart (mm) Isle of Lewis monthly rainfall chart (inches)
Average monthly rainfall in Isle of Lewis (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 146 100 120 76 68 74 86 96 134 157 154 153
inches 5.7 3.9 4.7 3 2.7 2.9 3.4 3.8 5.3 6.2 6.1 6
Rainy days 25 19 24 20 19 19 21 21 24 25 25 26

Average annual rainfall in Isle of Lewis: 1416.133mm (557.5 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Isle of Lewis

Isle of Lewis average daily sunshine chart
Average daily sunshine Isle of Lewis
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.4 2.8 3.8 5.7 6.6 6.5 4.6 4.8 3.8 2.9 1.7 1.1

Day / night temperatures

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

Isle of Lewis average minimum / maximum temperatures (Celsius) Isle of Lewis average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Isle of Lewis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.6 1.2 2.1 3.1 5.7 8.1 9.7 9.8 8.3 6.4 3.1 2.3
Max °C 6.4 6.4 7.5 9.3 11.9 14.1 15.2 15.5 13.6 11.6 8.3 7.2
Min °F 34.9 34.2 35.8 37.6 42.3 46.6 49.4 49.6 46.9 43.5 37.6 36.1
Max °F 39.2 38.8 40.6 43.2 47.8 52 54.3 54.7 51.6 48.2 42.3 40.5

Sea temperature

The graph below shows the average sea temperature.

Isle of Lewis average sea temperature chart (Celsius) Isle of Lewis average sea temperature chart (Fahrenheit)
Average sea temperature around Isle of Lewis in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9 8.4 8.3 8.6 9.7 11.3 12.8 13.6 13.1 12.1 10.9 9.8
°F 48.2 47.2 47 47.5 49.4 52.4 55.1 56.5 55.5 53.8 51.6 49.7

Wind speed

The graph below shows the average wind speed.

Isle of Lewis average winspeed by month (km/h) Isle of Lewis average winspeed by month (mph)
Average wind speed in Isle of Lewis (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 27 25 25 21 21 19 19 18 22 24 24 26
mph 17 16 16 13 13 12 12 11 14 15 15 16

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.

Isle of Lewis relative humidity averages
Average relative humidity in Isle of Lewis
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
89% 87% 87% 86% 84% 85% 87% 88% 89% 90% 90% 90%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Isle of Lewis weather stats

Isle of Lewis weather statistics
Hottest month: August 15.3°C 59.5°F
Driest month: May 68mm 2.7ins
Sunniest month: April 5.7hrs
Coldest month: February 6.3°C 43.3°F
Wettest month: October 157mm 6.2ins
Warmest sea: August 13.6°C 56.5°F
Map showing location of Isle of Lewis (58.21901, -6.38803) Isle of Lewis map pin © Google

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