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 | 3.8 | 5.9 | 12.3 | 18.1 | 23.4 | 27.7 | 29.5 | 28.9 | 25.5 | 19.5 | 12.9 | 6.5 |
°F | 38.9 | 42.7 | 54.2 | 64.6 | 74.2 | 81.9 | 85.2 | 84 | 77.9 | 67.1 | 55.1 | 43.7 |
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 | 77 | 73 | 99 | 92 | 111 | 91 | 108 | 101 | 82 | 63 | 77 | 80 |
inches | 3 | 2.9 | 3.9 | 3.6 | 4.4 | 3.6 | 4.3 | 4 | 3.2 | 2.5 | 3 | 3.2 |
Rainy days | 13 | 12 | 14 | 13 | 12 | 11 | 11 | 10 | 9 | 9 | 11 | 13 |
Average annual rainfall in Portsmouth: 1007.833mm (396.8 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 | 4.3 | 5.1 | 6.1 | 7.5 | 8.5 | 9.2 | 8.9 | 8.5 | 7.7 | 6.7 | 4.4 | 3.6 |
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 | -6.5 | -5.2 | 0.4 | 5.2 | 10.3 | 14.6 | 17 | 16 | 12.2 | 5.6 | 0.9 | -3.8 |
Max °C | 4.1 | 6.2 | 12.6 | 18.5 | 23.8 | 28.1 | 29.9 | 29.2 | 25.8 | 19.9 | 13.2 | 6.8 |
Min °F | 20.3 | 22.6 | 32.7 | 41.3 | 50.5 | 58.2 | 62.5 | 60.8 | 54 | 42 | 33.5 | 25.3 |
Max °F | 29.8 | 32.9 | 43.7 | 53.2 | 62.6 | 70.3 | 74.1 | 72.7 | 66.2 | 54.9 | 44.6 | 34.7 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 7.6 | 6.7 | 6.8 | 9 | 13.7 | 19.6 | 24 | 24.9 | 22.9 | 18.4 | 13.7 | 9.8 |
°F | 45.7 | 44.1 | 44.3 | 48.2 | 56.7 | 67.3 | 75.2 | 76.8 | 73.3 | 65.1 | 56.6 | 49.7 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 15 | 15 | 16 | 15 | 12 | 11 | 10 | 10 | 10 | 12 | 14 | 15 |
mph | 9 | 9 | 10 | 9 | 8 | 7 | 6 | 6 | 6 | 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 |
---|---|---|---|---|---|---|---|---|---|---|---|
70% | 68% | 64% | 61% | 68% | 71% | 74% | 75% | 76% | 70% | 70% | 72% |
Hottest month: | July | 29.5°C 85.1°F |
---|---|---|
Driest month: | October | 63mm 2.5ins |
Sunniest month: | June | 9.2hrs |
Coldest month: | January | 3.8°C 38.8°F |
Wettest month: | May | 111mm 4.4ins |
Warmest sea: | August | 24.9°C 76.8°F |