Helensburgh monthly weather averages

Average daytime temperature

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

Helensburgh average temperature chart (Celsius) Helensburgh average temperature chart (Fahrenheit)
Average monthly temperatures in Helensburgh (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.5 4.5 6.5 9.5 12.9 15.7 16.7 16.4 13.8 10.9 6.9 5.3
°F 40.2 40.1 43.7 49 55.2 60.2 62 61.6 56.8 51.6 44.5 41.6

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.

Helensburgh monthly rainfall chart (mm) Helensburgh monthly rainfall chart (inches)
Average monthly rainfall in Helensburgh (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 296 197 232 129 146 136 155 195 264 288 265 283
inches 11.7 7.8 9.1 5.1 5.7 5.4 6.1 7.7 10.4 11.3 10.4 11.1
Rainy days 23 18 21 17 18 17 18 19 22 22 22 23

Average annual rainfall in Helensburgh: 2637.433mm (1038.4 inches)

Average daily sunshine

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

Helensburgh average daily sunshine chart
Average daily sunshine Helensburgh
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 1.3 2.4 3.2 5.2 5.9 6 5.4 4.9 3.7 2.6 1.8 1.2

Day / night temperatures

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

Helensburgh average minimum / maximum temperatures (Celsius) Helensburgh average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Helensburgh (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -0.1 -0.4 0.8 2.2 4.9 7.8 9.4 9.2 7.7 5.6 2 0.8
Max °C 4.7 4.6 6.7 9.7 13.1 15.9 16.9 16.6 14 11 7.1 5.5
Min °F 31.9 31.3 33.4 35.9 40.8 46 48.8 48.6 45.8 42.1 35.5 33.4
Max °F 36.1 35.8 38.7 42.6 48.2 53.2 55.6 55.2 51.4 46.9 40.1 37.6

Sea temperature

The graph below shows the average sea temperature.

Helensburgh average sea temperature chart (Celsius) Helensburgh average sea temperature chart (Fahrenheit)
Average sea temperature around Helensburgh in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.3 7.4 7.2 8 9.6 11.7 13.4 14.2 13.8 12.9 11.5 9.8
°F 46.9 45.3 45 46.3 49.3 53.1 56.2 57.6 56.9 55.3 52.6 49.6

Wind speed

The graph below shows the average wind speed.

Helensburgh average winspeed by month (km/h) Helensburgh average winspeed by month (mph)
Average wind speed in Helensburgh (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 18 20 17 16 16 16 15 17 18 18 19
mph 12 11 12 11 10 10 10 9 10 11 11 12

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.

Helensburgh relative humidity averages
Average relative humidity in Helensburgh
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
92% 89% 86% 82% 79% 81% 83% 85% 87% 89% 91% 92%

Other monthly averages

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Helensburgh weather stats

Helensburgh weather statistics
Hottest month: July 16.7°C 62.1°F
Driest month: April 129mm 5.1ins
Sunniest month: April 5.2hrs
Coldest month: February 4.5°C 40.1°F
Wettest month: January 296mm 11.7ins
Warmest sea: August 14.2°C 57.6°F
Map showing location of Helensburgh (56.00614, -4.72648) Helensburgh map pin © Google

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