The bar chart below shows the average monthly peak daytime temperatures at Boulder
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | -1.6 | 1.6 | 4.9 | 10.7 | 16 | 21.5 | 26.8 | 25.9 | 19.1 | 13.1 | 4.4 | -1 |
°F | 29.1 | 34.8 | 40.7 | 51.2 | 60.7 | 70.8 | 80.3 | 78.7 | 66.4 | 55.6 | 39.8 | 30.2 |
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 | 19 | 14 | 25 | 30 | 55 | 60 | 36 | 36 | 34 | 22 | 19 | 17 |
inches | 0.8 | 0.5 | 1 | 1.2 | 2.2 | 2.4 | 1.4 | 1.4 | 1.4 | 0.9 | 0.7 | 0.7 |
Rainy days | 10 | 8 | 10 | 10 | 12 | 11 | 8 | 8 | 8 | 6 | 8 | 10 |
Average annual rainfall in Boulder: 301.867mm (118.8 inches)
The bar chart below shows the average daily sunshine hours in Boulder
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 4.4 | 6 | 7.9 | 8.7 | 9.6 | 10.9 | 12.7 | 11.1 | 9.2 | 7.3 | 4.4 | 3.8 |
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 | -13.5 | -10.7 | -7.4 | -2.6 | 2.1 | 6.5 | 9.2 | 8.3 | 3.1 | -1.7 | -7.7 | -12.9 |
Max °C | -1.3 | 1.9 | 5.2 | 11 | 16.3 | 21.9 | 27.3 | 26.4 | 19.5 | 13.5 | 4.7 | -0.7 |
Min °F | 7.7 | 12.8 | 18.8 | 27.3 | 35.8 | 43.7 | 48.5 | 46.9 | 37.6 | 28.9 | 18.2 | 8.8 |
Max °F | 18.7 | 24.1 | 30 | 39.6 | 48.6 | 57.6 | 64.8 | 63.1 | 52.3 | 42.6 | 29.3 | 19.8 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 7.7 | 7.6 | 7.8 | 8.2 | 9.2 | 10.8 | 12.8 | 14.3 | 13.7 | 11.7 | 9.7 | 8.3 |
°F | 45.9 | 45.7 | 46 | 46.8 | 48.5 | 51.5 | 55 | 57.8 | 56.7 | 53 | 49.4 | 46.9 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 14 | 15 | 16 | 17 | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 14 |
mph | 9 | 9 | 10 | 11 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|
67% | 65% | 61% | 54% | 55% | 53% | 47% | 48% | 55% | 58% | 66% | 69% |
Hottest month: | July | 26.8°C 80.2°F |
---|---|---|
Driest month: | February | 14mm 0.6ins |
Sunniest month: | July | 12.7hrs |
Coldest month: | January | -1.6°C 29.1°F |
Wettest month: | June | 60mm 2.4ins |
Warmest sea: | August | 14.3°C 57.7°F |