Johnstone monthly weather averages

Contents

Average daytime temperature

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

Johnstone average temperature chart (Celsius) Johnstone average temperature chart (Fahrenheit)
Average monthly temperatures in Johnstone (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.6 5.7 7.7 10.6 13.8 16.5 17.7 17.4 14.9 12.1 8.1 6.4
°F 42.1 42.3 45.8 51 56.9 61.7 63.8 63.3 58.7 53.7 46.6 43.5

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.

Johnstone monthly rainfall chart (mm) Johnstone monthly rainfall chart (inches)
Average monthly rainfall in Johnstone (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 136 88 111 67 78 77 87 116 153 150 139 133
inches 5.4 3.5 4.4 2.7 3.1 3 3.4 4.6 6 5.9 5.5 5.2
Rainy days 21 17 20 16 17 16 16 18 20 21 20 21

Average annual rainfall in Johnstone: 1386.167mm (545.7 inches)

Average daily sunshine

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

Johnstone average daily sunshine chart
Average daily sunshine Johnstone
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.5 2.6 3.4 5.4 6.4 6.6 5.8 5.2 4 2.9 2.1 1.4

Day / night temperatures

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

Johnstone average minimum / maximum temperatures (Celsius) Johnstone average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Johnstone (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 0.9 0.8 1.8 3.5 6 8.9 10.6 10.5 8.8 6.6 3 1.7
Max °C 5.7 5.9 7.8 10.8 14 16.7 17.9 17.6 15 12.2 8.3 6.5
Min °F 33.6 33.4 35.2 38.2 42.8 48 51 50.8 47.8 43.9 37.3 35.1
Max °F 37.9 37.9 40.6 44.8 50 55 57.6 57.2 53.4 48.9 42.1 39.4

Sea temperature

The graph below shows the average sea temperature.

Johnstone average sea temperature chart (Celsius) Johnstone average sea temperature chart (Fahrenheit)
Average sea temperature around Johnstone in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.1 6.9 6.8 7.8 9.8 12 13.8 14.7 14.5 13.6 11.9 9.9
°F 46.5 44.4 44.2 46.1 49.6 53.6 56.9 58.4 58.1 56.4 53.4 49.8

Wind speed

The graph below shows the average wind speed.

Johnstone average winspeed by month (km/h) Johnstone average winspeed by month (mph)
Average wind speed in Johnstone (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 18 19 17 16 16 15 14 17 17 18 18
mph 12 11 12 11 10 10 9 9 10 11 11 11

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.

Johnstone relative humidity averages
Average relative humidity in Johnstone
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
90% 87% 83% 80% 77% 79% 81% 83% 86% 88% 89% 90%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Johnstone weather stats

Johnstone weather statistics
Hottest month: July 17.7°C 63.9°F
Driest month: April 67mm 2.6ins
Sunniest month: May 6.4hrs
Coldest month: January 5.6°C 42.1°F
Wettest month: September 153mm 6ins
Warmest sea: August 14.7°C 58.5°F
Map showing location of Johnstone (55.82906, -4.51605) Johnstone map pin © Google

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