Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Harmon experiences a minor change to a still warm 79.3°F (26.3°C) in average high-temperature during August, closely reflecting July. During August nights, Harmon witnesses a consistent average temperature of 61.7°F (16.5°C).Humidity
The average relative humidity in August in Harmon is 83%.Rainfall
In August, the rain falls for 12.5 days. Throughout August, 1.34" (34mm) of precipitation is accumulated. In Harmon, during the entire year, the rain falls for 130.2 days and collects up to 17.36" (441mm) of precipitation.Snowfall
In Harmon, snow does not fall in May through September.Daylight
The average length of the day in August in Harmon is 13h and 48min.On the first day of the month, sunrise is at 5:53 am and sunset at 8:15 pm. On the last day of August, in Harmon, sunrise is at 6:23 am and sunset at 7:32 pm CDT.
Sunshine
The average sunshine in August in Harmon is 9.7h.UV index
The average daily maximum UV index in August in Harmon, Illinois, is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 5 in August, converts into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August in Harmon?
What is the average humidity in August in Harmon?
How many days does it rain in August in Harmon?
When it does not snow in Harmon?
What is the average length of the day in August in Harmon?
What time are sunrise and sunset in August in Harmon?
How long on average sun shines in August in Harmon?
What is the UV index reading in August in Harmon?
Average temperature in August
Harmon, IL
- Average high temperature in August: 79.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in August: 61.7°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in August
Harmon, IL
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Harmon, IL
- Average wind speed in August: 6.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in August
Harmon, IL
- Average humidity in August: 83%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Harmon, IL
- Average rainfall in August: 1.34"
The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in August
Harmon, IL
- Average rainfall days in August: 12.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in August
Harmon, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Harmon, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Harmon, IL
- Average daylight in August: 13h and 5min
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: 9h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in August
Harmon, IL
- Average sunshine days in August: 15.8 days
The months with the most sunshine days are November and December (18.8 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in August
Harmon, IL
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Harmon, IL
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in August
Harmon, IL
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Harmon, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location