August weather forecastHarwood Heights, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Harwood Heights, Illinois, with an average temperature varying between 79.2°F (26.2°C) and 66.7°F (19.3°C).Temperature
August's onset brings an average high-temperature of a still moderately hot 79.2°F (26.2°C), showing a minute difference from July's 79.7°F (26.5°C). August witnesses an average low-temperature hovering around a comfortable 66.7°F (19.3°C).Humidity
The average relative humidity in August in Harwood Heights is 74%.Rainfall
In August, the rain falls for 10.5 days. Throughout August, 0.63" (16mm) of precipitation is accumulated. In Harwood Heights, during the entire year, the rain falls for 98.2 days and collects up to 7.36" (187mm) of precipitation.Snowfall
In Harwood Heights, snow does not fall in June through September.Daylight
The average length of the day in August is 13h and 49min.On the first day of August, sunrise is at 5:45 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 7:25 pm CDT.
Sunshine
The months with the most sunshine are July and August, with an average of 10.4h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 during August translates into the following directions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Harwood Heights, IL
- Average high temperature in August: 79.2°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in August: 66.7°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in August
Harwood Heights, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Harwood Heights, IL
- Average wind speed in August: 7mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in August
Harwood Heights, IL
- Average humidity in August: 74%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Harwood Heights, IL
- Average rainfall in August: 0.63"
The wettest month (with the highest rainfall) is May (1.06").
The driest month (with the least rainfall) is December (0.31").
Average rainfall days in August
Harwood Heights, IL
- Average rainfall days in August: 10.5 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in August
Harwood Heights, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Harwood Heights, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Harwood Heights, IL
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 10h and 24min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Harwood Heights, IL
- Average sunshine days in August: 17.2 days
The month with the most sunshine days is December (23.3 days).
The month with the least sunshine days is June (14.7 days).
Average UV index in August
Harwood Heights, IL
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Harwood Heights, IL
- Average cloud cover in August: 28
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in August
Harwood Heights, IL
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
