The bar chart below shows the average monthly peak daytime temperatures at Portstewart
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 6.5 | 6.6 | 8.4 | 10.7 | 13.4 | 16 | 17.1 | 17.1 | 15.2 | 12.6 | 8.8 | 7.3 |
°F | 43.6 | 43.8 | 47.1 | 51.3 | 56.1 | 60.8 | 62.9 | 62.8 | 59.3 | 54.6 | 47.9 | 45.1 |
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 | 121 | 84 | 93 | 66 | 71 | 71 | 76 | 92 | 105 | 123 | 113 | 113 |
inches | 4.8 | 3.3 | 3.7 | 2.6 | 2.8 | 2.8 | 3 | 3.6 | 4.1 | 4.8 | 4.5 | 4.5 |
Rainy days | 22 | 17 | 20 | 17 | 17 | 17 | 18 | 20 | 20 | 22 | 22 | 22 |
Average annual rainfall in Portstewart: 1176.5665mm (463.2 inches)
The bar chart below shows the average daily sunshine hours in Portstewart
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 1.5 | 2.5 | 3.3 | 5.4 | 6.2 | 5.8 | 4.6 | 4.6 | 3.7 | 2.8 | 2 | 1.2 |
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 | 1.2 | 1 | 2.1 | 3.4 | 5.6 | 8.3 | 10.2 | 10 | 8.5 | 6.6 | 3.2 | 2.1 |
Max °C | 6.6 | 6.7 | 8.5 | 10.9 | 13.6 | 16.2 | 17.3 | 17.3 | 15.3 | 12.7 | 9 | 7.4 |
Min °F | 34.1 | 33.9 | 35.7 | 38.1 | 42 | 46.9 | 50.3 | 49.9 | 47.3 | 43.9 | 37.7 | 35.8 |
Max °F | 39 | 39 | 41.5 | 44.8 | 49.2 | 54.1 | 56.8 | 56.5 | 53.4 | 49.4 | 42.9 | 40.6 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 8.7 | 7.9 | 7.8 | 8.5 | 10 | 11.9 | 13.5 | 14.3 | 14 | 13 | 11.6 | 10.1 |
°F | 47.7 | 46.2 | 46.1 | 47.4 | 50 | 53.5 | 56.3 | 57.8 | 57.2 | 55.4 | 52.8 | 50.1 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 27 | 26 | 26 | 22 | 21 | 19 | 19 | 19 | 22 | 24 | 25 | 26 |
mph | 17 | 16 | 16 | 14 | 13 | 12 | 12 | 12 | 14 | 15 | 16 | 16 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
90% | 87% | 86% | 84% | 84% | 84% | 86% | 88% | 89% | 90% | 90% | 92% |
Hottest month: | July | 17.1°C 62.8°F |
---|---|---|
Driest month: | April | 66mm 2.6ins |
Sunniest month: | May | 6.2hrs |
Coldest month: | January | 6.5°C 43.7°F |
Wettest month: | October | 123mm 4.8ins |
Warmest sea: | August | 14.3°C 57.7°F |