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
August's arrival brings an average high-temperature of a still moderately hot 80.6°F (27°C), demonstrating subtle variation from the preceding month. August in Henderson generally records an average low-temperature of 63.3°F (17.4°C).Heat index
The heat index in August is calculated to be a tropical 86°F (30°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.Understanding the heat index involves considering values for shaded locales with light wind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
In August, the average relative humidity in Henderson is 81%.Rainfall
In Henderson, in August, it is raining for 10.1 days, with typically 0.83" (21mm) of accumulated precipitation. In Henderson, during the entire year, the rain falls for 109.9 days and collects up to 11.14" (283mm) of precipitation.Snowfall
In Henderson, snow does not fall in May through September.Daylight
In Henderson, the average length of the day in August is 13h and 46min.On the first day of the month, sunrise is at 5:58 am and sunset at 8:17 pm. On the last day of August, in Henderson, sunrise is at 6:27 am and sunset at 7:35 pm CDT.
Sunshine
In August, the average sunshine is 9.8h.UV index
In Henderson, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The daily maximum UV index of 5 in August interprets into the following advice:
Guard yourself - Precautionary measures against sun damage are advocated. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What is the usual temperature for Henderson in August?
What is the average humidity in August in Henderson?
How many days does it rain in August in Henderson?
When it does not snow in Henderson?
What is the average length of the day in August in Henderson?
When is the sunrise / sunset in August in Henderson?
How many hours of sunshine does Henderson have in August?
What is the UV index intensity in August in Henderson?
Average temperature in August
Henderson, IL
- Average high temperature in August: 80.6°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in August: 63.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in August
Henderson, IL
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Henderson, IL
- Average wind speed in August: 6.8mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in August
Henderson, IL
- Average humidity in August: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Henderson, IL
- Average rainfall in August: 0.83"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").
Average rainfall days in August
Henderson, IL
- Average rainfall days in August: 10.1 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in August
Henderson, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Henderson, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.8 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
Henderson, IL
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 9h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in August
Henderson, IL
- Average sunshine days in August: 16.8 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in August
Henderson, IL
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Henderson, IL
- Average cloud cover in August: 31
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in August
Henderson, IL
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Henderson, Illinois, USA
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