The bar chart below shows the average monthly peak daytime temperatures at Grantham
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 5.8 | 6.1 | 8.9 | 11.5 | 15.3 | 18.6 | 20.5 | 20.3 | 17.8 | 13.9 | 8.9 | 6.6 |
°F | 42.4 | 42.9 | 48.1 | 52.8 | 59.6 | 65.4 | 68.8 | 68.5 | 64 | 57 | 47.9 | 43.8 |
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 | 51 | 41 | 49 | 51 | 53 | 54 | 49 | 62 | 49 | 47 | 55 | 54 |
inches | 2 | 1.6 | 1.9 | 2 | 2.1 | 2.1 | 1.9 | 2.4 | 1.9 | 1.8 | 2.2 | 2.1 |
Rainy days | 18 | 15 | 16 | 15 | 15 | 13 | 11 | 13 | 12 | 14 | 16 | 16 |
Average annual rainfall in Grantham: 666.734mm (262.5 inches)
The bar chart below shows the average daily sunshine hours in Grantham
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 2 | 2.5 | 3.7 | 4.8 | 6.5 | 7.1 | 6.2 | 6 | 5 | 3.7 | 2.5 | 1.9 |
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 | 0.3 | 0.2 | 1.5 | 3.3 | 6.1 | 9 | 10.9 | 10.9 | 9 | 6.4 | 2.8 | 1.1 |
Max °C | 5.9 | 6.2 | 9.1 | 11.8 | 15.6 | 18.8 | 20.7 | 20.5 | 18 | 14.1 | 9 | 6.7 |
Min °F | 32.5 | 32.4 | 34.7 | 37.9 | 42.9 | 48.2 | 51.6 | 51.6 | 48.2 | 43.4 | 37 | 34 |
Max °F | 37.6 | 37.8 | 41.5 | 45.5 | 51.4 | 57 | 60.4 | 60.3 | 56.3 | 50.4 | 42.6 | 39 |
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 | 7.9 | 9.9 | 12.5 | 14.9 | 16.2 | 15.5 | 13.5 | 11.2 | 9.1 |
°F | 45.7 | 44.1 | 44.3 | 46.2 | 49.9 | 54.5 | 58.9 | 61.2 | 59.9 | 56.4 | 52.2 | 48.4 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 19 | 19 | 20 | 18 | 17 | 16 | 15 | 16 | 16 | 17 | 18 | 19 |
mph | 12 | 12 | 12 | 11 | 11 | 10 | 9 | 10 | 10 | 10 | 11 | 12 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
91% | 88% | 83% | 82% | 81% | 81% | 80% | 82% | 84% | 88% | 90% | 92% |
Hottest month: | July | 20.5°C 68.9°F |
---|---|---|
Driest month: | February | 41mm 1.6ins |
Sunniest month: | June | 7.1hrs |
Coldest month: | January | 5.8°C 42.4°F |
Wettest month: | August | 62mm 2.4ins |
Warmest sea: | August | 16.2°C 61.2°F |