Helston monthly weather averages

Average daytime temperature

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

Helston average temperature chart (Celsius) Helston average temperature chart (Fahrenheit)
Average monthly temperatures in Helston (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.5 8.2 9.5 11.3 13.8 16.6 18.5 18.6 16.8 14.2 11 9.5
°F 47.4 46.8 49.1 52.3 56.8 61.9 65.3 65.4 62.2 57.5 51.9 49.2

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.

Helston monthly rainfall chart (mm) Helston monthly rainfall chart (inches)
Average monthly rainfall in Helston (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 127 100 93 60 62 59 58 70 80 103 117 122
inches 5 3.9 3.7 2.4 2.5 2.3 2.3 2.7 3.1 4.1 4.6 4.8
Rainy days 22 17 18 15 14 13 12 14 15 18 20 21

Average annual rainfall in Helston: 1094.933mm (431.1 inches)

Average daily sunshine

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

Helston average daily sunshine chart
Average daily sunshine Helston
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2 3 4.3 6.4 7.5 7.5 7.3 6.8 5.5 3.7 2.7 1.9

Day / night temperatures

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

Helston average minimum / maximum temperatures (Celsius) Helston average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Helston (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 4 3.7 4.4 5.4 7.9 10.5 12.4 12.5 11.1 9.3 6.3 5
Max °C 8.7 8.4 9.7 11.4 14 16.8 18.7 18.7 16.9 14.3 11.2 9.7
Min °F 39.1 38.6 39.8 41.7 46.1 50.8 54.2 54.5 52 48.7 43.3 40.9
Max °F 43.3 42.8 44.6 47.1 51.6 56.5 59.9 60.1 57.2 53.2 47.7 45.1

Sea temperature

The graph below shows the average sea temperature.

Helston average sea temperature chart (Celsius) Helston average sea temperature chart (Fahrenheit)
Average sea temperature around Helston in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.2 9.4 9.2 9.8 11.5 13.8 15.9 16.7 16 14.5 12.7 11.3
°F 50.4 49 48.6 49.7 52.6 56.8 60.6 62.1 60.9 58.1 54.9 52.3

Wind speed

The graph below shows the average wind speed.

Helston average winspeed by month (km/h) Helston average winspeed by month (mph)
Average wind speed in Helston (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 24 23 22 21 20 18 17 17 18 20 22 24
mph 15 15 14 13 12 11 11 11 11 13 14 15

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.

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

Other monthly averages

UV index Best time to go?

Helston weather stats

Helston weather statistics
Hottest month: August 18.6°C 65.5°F
Driest month: July 58mm 2.3ins
Sunniest month: May 7.5hrs
Coldest month: February 8.2°C 46.8°F
Wettest month: January 127mm 5ins
Warmest sea: August 16.7°C 62.1°F
Map showing location of Helston (50.10319, -5.27045) Helston map pin © Google

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