The bar chart below shows the average monthly peak daytime temperatures at Saint Helens
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 6.8 | 9.3 | 11.8 | 14.3 | 17.9 | 21.2 | 24.1 | 24.4 | 21.7 | 16.3 | 10.3 | 6.8 |
°F | 44.2 | 48.8 | 53.3 | 57.8 | 64.2 | 70.2 | 75.3 | 75.9 | 71 | 61.3 | 50.5 | 44.2 |
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.
The graph below shows the average rainfall and number of rainy days per month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
mm | 191 | 138 | 125 | 89 | 64 | 52 | 22 | 33 | 55 | 105 | 182 | 202 |
inches | 7.5 | 5.4 | 4.9 | 3.5 | 2.5 | 2 | 0.9 | 1.3 | 2.2 | 4.1 | 7.2 | 8 |
Rainy days | 18 | 16 | 17 | 15 | 12 | 9 | 5 | 6 | 8 | 12 | 19 | 19 |
Average annual rainfall in Saint Helens: 1180.767mm (464.9 inches)
The bar chart below shows the average daily sunshine hours in Saint Helens
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 3 | 4.5 | 6.5 | 7.7 | 9.2 | 10.1 | 11.2 | 10.1 | 8.3 | 5.3 | 2.9 | 2.3 |
The graph below shows the daily range of temperatures for each month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Min °C | -0.2 | 0.9 | 2 | 3.4 | 6.1 | 8.9 | 10.6 | 10.5 | 8.2 | 4.9 | 2.6 | 0.5 |
Max °C | 7 | 9.6 | 12.1 | 14.6 | 18.2 | 21.5 | 24.4 | 24.7 | 22 | 16.6 | 10.5 | 7 |
Min °F | 31.7 | 33.5 | 35.5 | 38.1 | 42.9 | 48 | 51.1 | 50.9 | 46.8 | 40.7 | 36.6 | 32.8 |
Max °F | 38.1 | 41.4 | 44.6 | 48.2 | 53.8 | 59.4 | 63.5 | 63.7 | 59.2 | 51.3 | 43.7 | 38.7 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 9.1 | 9 | 9.1 | 9.5 | 10.4 | 11.7 | 12.9 | 13.5 | 13.3 | 12 | 10.7 | 9.6 |
°F | 48.3 | 48.1 | 48.4 | 49.1 | 50.7 | 53.1 | 55.3 | 56.3 | 55.9 | 53.6 | 51.2 | 49.2 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 11 | 14 | 15 |
mph | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 9 | 9 |
A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.
The graph below shows the average relative humidity.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|
82% | 79% | 76% | 73% | 70% | 68% | 65% | 67% | 71% | 79% | 83% | 84% |
Hottest month: | August | 24.4°C 75.9°F |
---|---|---|
Driest month: | July | 22mm 0.9ins |
Sunniest month: | July | 11.2hrs |
Coldest month: | January | 6.8°C 44.2°F |
Wettest month: | December | 202mm 8ins |
Warmest sea: | August | 13.5°C 56.3°F |