The bar chart below shows the average monthly peak daytime temperatures at Portsmouth
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 8.4 | 9.6 | 14.4 | 19.4 | 23.9 | 28.2 | 30.2 | 29.5 | 26.3 | 20.9 | 16.1 | 10.9 |
°F | 47.1 | 49.3 | 57.8 | 66.9 | 75 | 82.8 | 86.3 | 85.2 | 79.4 | 69.6 | 60.9 | 51.6 |
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.
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 | 89 | 84 | 92 | 75 | 87 | 88 | 122 | 122 | 94 | 77 | 69 | 77 |
inches | 3.5 | 3.3 | 3.6 | 2.9 | 3.4 | 3.5 | 4.8 | 4.8 | 3.7 | 3 | 2.7 | 3 |
Rainy days | 11 | 10 | 10 | 10 | 10 | 10 | 11 | 10 | 8 | 7 | 8 | 9 |
Average annual rainfall in Portsmouth: 1038.467mm (408.8 inches)
The bar chart below shows the average daily sunshine hours in Portsmouth
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 6.1 | 6.8 | 7.9 | 9 | 9.4 | 10 | 9.6 | 9 | 8.3 | 7.3 | 6.5 | 5.8 |
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 | -0.4 | 0.4 | 4.4 | 8.8 | 14.1 | 18.8 | 21.4 | 21.1 | 18.1 | 11.9 | 6.7 | 1.9 |
Max °C | 8.6 | 9.9 | 14.6 | 19.7 | 24.2 | 28.5 | 30.4 | 29.8 | 26.6 | 21.1 | 16.3 | 11.1 |
Min °F | 31.3 | 32.6 | 39.9 | 47.8 | 57.3 | 65.8 | 70.5 | 69.9 | 64.5 | 53.4 | 44.1 | 35.4 |
Max °F | 39.4 | 41.2 | 49.1 | 57.6 | 66.4 | 74.5 | 78.6 | 77.7 | 72.1 | 61.7 | 52.7 | 43.7 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 10.6 | 9.5 | 10.3 | 13.1 | 17.2 | 22.2 | 25.7 | 26.1 | 24.1 | 20.1 | 16 | 12.9 |
°F | 51.1 | 49.1 | 50.5 | 55.6 | 63 | 72 | 78.2 | 79 | 75.4 | 68.2 | 60.7 | 55.3 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 18 | 19 | 19 | 18 | 17 | 16 | 14 | 14 | 15 | 16 | 17 | 18 |
mph | 11 | 12 | 12 | 11 | 10 | 10 | 9 | 9 | 9 | 10 | 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 |
---|---|---|---|---|---|---|---|---|---|---|---|
67% | 66% | 65% | 63% | 70% | 72% | 74% | 76% | 75% | 72% | 69% | 68% |
Hottest month: | July | 30.2°C 86.4°F |
---|---|---|
Driest month: | November | 69mm 2.7ins |
Sunniest month: | April | 9hrs |
Coldest month: | January | 8.4°C 47.1°F |
Wettest month: | August | 122mm 4.8ins |
Warmest sea: | August | 26.1°C 79°F |