The bar chart below shows the average monthly peak daytime temperatures at Alton
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 5.4 | 8.3 | 14.4 | 20.5 | 24.7 | 29.1 | 32 | 31 | 26.4 | 21.1 | 13.6 | 7.4 |
°F | 41.8 | 47 | 57.9 | 68.9 | 76.4 | 84.3 | 89.6 | 87.8 | 79.6 | 70 | 56.5 | 45.3 |
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 | 68 | 76 | 110 | 108 | 118 | 93 | 91 | 89 | 95 | 79 | 114 | 96 |
inches | 2.7 | 3 | 4.3 | 4.3 | 4.6 | 3.7 | 3.6 | 3.5 | 3.7 | 3.1 | 4.5 | 3.8 |
Rainy days | 9 | 9 | 11 | 11 | 11 | 9 | 8 | 8 | 8 | 8 | 9 | 10 |
Average annual rainfall in Alton: 1080.833mm (425.5 inches)
The bar chart below shows the average daily sunshine hours in Alton
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 5.8 | 6.3 | 7.7 | 8.7 | 10.4 | 11.1 | 11 | 10.3 | 8.6 | 8.7 | 6 | 5.4 |
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 | -7 | -4.5 | 0.7 | 6.2 | 10.6 | 15.6 | 18.1 | 16.9 | 12.9 | 5.9 | 0.7 | -4.5 |
Max °C | 5.8 | 8.7 | 14.7 | 20.9 | 25 | 29.4 | 32.4 | 31.4 | 26.8 | 21.5 | 14 | 7.7 |
Min °F | 19.5 | 24 | 33.3 | 43.1 | 51.1 | 60.1 | 64.5 | 62.3 | 55.1 | 42.6 | 33.2 | 24 |
Max °F | 30.9 | 35.8 | 45.9 | 56.3 | 64 | 72.5 | 77.4 | 75.4 | 67.6 | 56.7 | 45.1 | 34.9 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 12.1 | 11.7 | 12.4 | 14.1 | 16.5 | 19.2 | 21.8 | 24 | 22.7 | 19 | 15.8 | 13.6 |
°F | 53.8 | 53.1 | 54.4 | 57.3 | 61.6 | 66.5 | 71.2 | 75.3 | 72.9 | 66.1 | 60.5 | 56.5 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 17 | 18 | 19 | 18 | 15 | 14 | 13 | 13 | 13 | 14 | 16 | 17 |
mph | 11 | 11 | 12 | 11 | 9 | 9 | 8 | 8 | 8 | 9 | 10 | 11 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
70% | 69% | 65% | 64% | 69% | 69% | 70% | 71% | 72% | 68% | 70% | 72% |
Hottest month: | July | 32°C 89.6°F |
---|---|---|
Driest month: | January | 68mm 2.7ins |
Sunniest month: | July | 11hrs |
Coldest month: | January | 5.4°C 41.7°F |
Wettest month: | May | 118mm 4.6ins |
Warmest sea: | August | 24°C 75.2°F |