The bar chart below shows the average monthly peak daytime temperatures at Derry
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 8.3 | 8.3 | 9.9 | 11.7 | 13.9 | 16.5 | 18.3 | 18 | 16.3 | 13.6 | 10.5 | 9.2 |
°F | 47 | 47 | 49.7 | 53 | 57.1 | 61.7 | 64.9 | 64.5 | 61.3 | 56.5 | 50.9 | 48.6 |
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 | 150 | 116 | 110 | 72 | 85 | 69 | 74 | 97 | 123 | 129 | 132 | 152 |
inches | 5.9 | 4.6 | 4.3 | 2.8 | 3.3 | 2.7 | 2.9 | 3.8 | 4.9 | 5.1 | 5.2 | 6 |
Rainy days | 22 | 19 | 19 | 16 | 18 | 16 | 15 | 18 | 18 | 21 | 21 | 22 |
Average annual rainfall in Derry: 1352mm (532.3 inches)
The bar chart below shows the average daily sunshine hours in Derry
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 1.9 | 2.6 | 3.8 | 5.7 | 6.5 | 6.1 | 5.7 | 5.5 | 4.4 | 3.1 | 2.4 | 1.8 |
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 | 3.6 | 3.4 | 4 | 5 | 7.1 | 9.8 | 11.6 | 11.4 | 10.2 | 8.3 | 5.4 | 4.5 |
Max °C | 8.5 | 8.5 | 10 | 11.9 | 14.1 | 16.7 | 18.5 | 18.2 | 16.5 | 13.8 | 10.6 | 9.4 |
Min °F | 38.4 | 38 | 39.2 | 40.9 | 44.8 | 49.6 | 52.8 | 52.5 | 50.3 | 46.9 | 41.7 | 40 |
Max °F | 42.8 | 42.6 | 44.6 | 47.1 | 51.1 | 55.8 | 59 | 58.6 | 55.9 | 51.8 | 46.4 | 44.4 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 10.4 | 9.9 | 9.8 | 10.3 | 11.8 | 14 | 15.9 | 16.4 | 15.6 | 13.9 | 12.2 | 11 |
°F | 50.7 | 49.9 | 49.6 | 50.6 | 53.2 | 57.2 | 60.6 | 61.6 | 60 | 57.1 | 53.9 | 51.8 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 24 | 23 | 23 | 19 | 19 | 17 | 17 | 17 | 19 | 21 | 21 | 23 |
mph | 15 | 15 | 14 | 12 | 12 | 11 | 10 | 11 | 12 | 13 | 13 | 14 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
89% | 87% | 84% | 82% | 81% | 83% | 83% | 85% | 86% | 88% | 89% | 91% |
Hottest month: | July | 18.3°C 64.9°F |
---|---|---|
Driest month: | June | 69mm 2.7ins |
Sunniest month: | May | 6.5hrs |
Coldest month: | February | 8.3°C 46.9°F |
Wettest month: | December | 152mm 6ins |
Warmest sea: | August | 16.4°C 61.5°F |