The bar chart below shows the average monthly peak daytime temperatures at Heerlen
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 4.4 | 5.6 | 9.1 | 12.8 | 17.6 | 20.6 | 22.2 | 22.2 | 19 | 14.7 | 8.6 | 5.2 |
°F | 40 | 42.2 | 48.3 | 55 | 63.7 | 69 | 72 | 71.9 | 66.3 | 58.5 | 47.5 | 41.3 |
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 | 62 | 55 | 66 | 56 | 68 | 78 | 77 | 70 | 59 | 61 | 73 | 75 |
inches | 2.5 | 2.2 | 2.6 | 2.2 | 2.7 | 3.1 | 3 | 2.8 | 2.3 | 2.4 | 2.9 | 2.9 |
Rainy days | 19 | 15 | 18 | 16 | 16 | 16 | 15 | 15 | 15 | 16 | 19 | 19 |
Average annual rainfall in Heerlen: 857.234mm (337.5 inches)
The bar chart below shows the average daily sunshine hours in Heerlen
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hrs sunshine | 1.5 | 2.9 | 3.5 | 5.2 | 6.6 | 6.5 | 6.6 | 6.3 | 4.9 | 3.8 | 2.2 | 1.4 |
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 | -0.8 | -0.6 | 1.6 | 3.8 | 7.8 | 10.8 | 12.6 | 12.4 | 10 | 6.9 | 2.9 | 0.5 |
Max °C | 4.6 | 5.8 | 9.3 | 13 | 17.9 | 20.8 | 22.5 | 22.4 | 19.3 | 14.9 | 8.8 | 5.3 |
Min °F | 30.7 | 30.9 | 34.8 | 38.8 | 46 | 51.4 | 54.6 | 54.3 | 49.9 | 44.4 | 37.1 | 32.9 |
Max °F | 35.4 | 36.7 | 41.7 | 47.1 | 55 | 60.4 | 63.5 | 63.3 | 58.3 | 51.6 | 42.4 | 37.2 |
The graph below shows the average sea temperature.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | 7.8 | 6.7 | 7.1 | 9 | 12.1 | 15.2 | 17.8 | 19.2 | 18.2 | 15.8 | 12.6 | 9.8 |
°F | 46.1 | 44.1 | 44.7 | 48.3 | 53.7 | 59.4 | 64.1 | 66.5 | 64.8 | 60.4 | 54.8 | 49.6 |
The graph below shows the average wind speed.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
km/h | 17 | 17 | 17 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 17 | 17 |
mph | 11 | 11 | 11 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 10 | 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 |
---|---|---|---|---|---|---|---|---|---|---|---|
88% | 84% | 80% | 75% | 74% | 75% | 75% | 76% | 81% | 84% | 87% | 89% |
Hottest month: | July | 22.2°C 72°F |
---|---|---|
Driest month: | February | 55mm 2.2ins |
Sunniest month: | May | 6.6hrs |
Coldest month: | January | 4.4°C 39.9°F |
Wettest month: | June | 78mm 3.1ins |
Warmest sea: | August | 19.2°C 66.6°F |