The bar chart below shows the average monthly peak daytime temperatures at Rock Island
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | -2.3 | 1 | 7.8 | 16.2 | 23 | 28.2 | 29.9 | 28.7 | 24.6 | 18.3 | 9.1 | 0.8 |
°F | 27.8 | 33.7 | 46 | 61.2 | 73.5 | 82.8 | 85.8 | 83.7 | 76.3 | 64.9 | 48.4 | 33.5 |
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 | 35 | 26 | 63 | 90 | 94 | 106 | 114 | 99 | 96 | 66 | 57 | 48 |
inches | 1.4 | 1 | 2.5 | 3.5 | 3.7 | 4.2 | 4.5 | 3.9 | 3.8 | 2.6 | 2.2 | 1.9 |
Rainy days | 9 | 8 | 11 | 11 | 12 | 10 | 10 | 9 | 9 | 9 | 9 | 10 |
Average annual rainfall in Rock Island: 846mm (333.1 inches)
The bar chart below shows the average daily sunshine hours in Rock Island
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 5.4 | 6.3 | 6.6 | 7.8 | 9.2 | 10.4 | 10.6 | 9.7 | 8.1 | 7 | 4.7 | 4.3 |
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 | -11.7 | -8.8 | -2.5 | 4.1 | 10.5 | 15.7 | 18.2 | 16.8 | 12.3 | 6.2 | -0.6 | -7.9 |
Max °C | -2.1 | 1.2 | 8.1 | 16.5 | 23.4 | 28.5 | 30.2 | 29 | 24.9 | 18.6 | 9.4 | 1.1 |
Min °F | 10.9 | 16.2 | 27.6 | 39.4 | 50.8 | 60.3 | 64.8 | 62.2 | 54.1 | 43.2 | 31 | 17.9 |
Max °F | 19.6 | 25.2 | 37 | 50.5 | 62.4 | 71.8 | 75.6 | 73.2 | 65.5 | 54.3 | 39.9 | 25.9 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 7.7 | 7.3 | 7.6 | 8.6 | 10.4 | 12.8 | 16.5 | 20.2 | 18.8 | 14.4 | 11.1 | 9 |
°F | 45.9 | 45.2 | 45.7 | 47.5 | 50.7 | 55.1 | 61.7 | 68.4 | 65.8 | 57.9 | 52 | 48.2 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 19 | 18 | 21 | 21 | 17 | 16 | 14 | 13 | 14 | 17 | 18 | 18 |
mph | 12 | 11 | 13 | 13 | 11 | 10 | 9 | 8 | 9 | 10 | 11 | 11 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
71% | 71% | 69% | 64% | 65% | 66% | 71% | 73% | 73% | 69% | 72% | 75% |
Hottest month: | July | 29.9°C 85.8°F |
---|---|---|
Driest month: | February | 26mm 1ins |
Sunniest month: | July | 10.6hrs |
Coldest month: | January | -2.3°C 27.9°F |
Wettest month: | July | 114mm 4.5ins |
Warmest sea: | August | 20.2°C 68.4°F |