The bar chart below shows the average monthly peak daytime temperatures at Gretna
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 6.3 | 6.6 | 8.6 | 11.5 | 14.8 | 17.6 | 18.8 | 18.7 | 16.3 | 13.3 | 9 | 6.9 |
°F | 43.4 | 43.9 | 47.5 | 52.6 | 58.6 | 63.7 | 65.8 | 65.6 | 61.4 | 56 | 48.1 | 44.4 |
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 | 98 | 65 | 79 | 58 | 65 | 72 | 82 | 101 | 105 | 108 | 100 | 99 |
inches | 3.8 | 2.5 | 3.1 | 2.3 | 2.6 | 2.8 | 3.2 | 4 | 4.1 | 4.2 | 3.9 | 3.9 |
Rainy days | 20 | 15 | 18 | 15 | 16 | 15 | 15 | 17 | 18 | 19 | 19 | 19 |
Average annual rainfall in Gretna: 1082.334mm (426.1 inches)
The bar chart below shows the average daily sunshine hours in Gretna
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 1.8 | 3 | 3.6 | 5.4 | 6.5 | 6.9 | 5.8 | 5.7 | 4.2 | 3.3 | 2.4 | 1.7 |
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 | 0.9 | 2 | 3.6 | 6 | 9.2 | 10.8 | 10.8 | 9.1 | 6.7 | 2.9 | 1.4 |
Max °C | 6.5 | 6.8 | 8.8 | 11.7 | 15 | 17.8 | 19 | 18.9 | 16.5 | 13.5 | 9.1 | 7 |
Min °F | 33.7 | 33.5 | 35.6 | 38.4 | 42.8 | 48.6 | 51.4 | 51.4 | 48.4 | 44.1 | 37.2 | 34.5 |
Max °F | 38.7 | 38.8 | 41.7 | 45.7 | 50.9 | 56.3 | 58.8 | 58.6 | 55 | 50.2 | 42.8 | 39.6 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 8.4 | 7.3 | 7.2 | 8 | 10 | 12.3 | 14.1 | 14.9 | 14.4 | 13.4 | 12 | 10.2 |
°F | 47.2 | 45.1 | 44.9 | 46.5 | 50 | 54.1 | 57.4 | 58.8 | 58 | 56.2 | 53.6 | 50.4 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 17 | 16 | 18 | 16 | 15 | 14 | 13 | 13 | 14 | 16 | 16 | 17 |
mph | 11 | 10 | 11 | 10 | 9 | 9 | 8 | 8 | 9 | 10 | 10 | 10 |
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% | 85% | 83% | 80% | 78% | 80% | 81% | 83% | 85% | 87% | 88% | 89% |
Hottest month: | July | 18.8°C 65.8°F |
---|---|---|
Driest month: | April | 58mm 2.3ins |
Sunniest month: | May | 6.5hrs |
Coldest month: | January | 6.3°C 43.3°F |
Wettest month: | October | 108mm 4.3ins |
Warmest sea: | August | 14.9°C 58.8°F |