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 brings an average high-temperature of a still warm 79.3°F (26.3°C), showing a slight difference from July's 81.1°F (27.3°C). Boulder Hill records an average nighttime low of 62.4°F (16.9°C) in August.Humidity
January, February, July and August, with an average relative humidity of 83%, are the most humid months.Rainfall
In Boulder Hill, during August, the rain falls for 15 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Boulder Hill, during the entire year, the rain falls for 133.1 days and collects up to 16.93" (430mm) of precipitation.Snowfall
May through September are months without snowfall in Boulder Hill.Daylight
In Boulder Hill, Illinois, the average length of the day in August is 13h and 48min.On the first day of the month, sunrise is at 5:48 am and sunset at 8:10 pm. On the last day of August, sunrise is at 6:19 am and sunset at 7:27 pm CDT.
Sunshine
The average sunshine in August in Boulder Hill is 9.7h.UV index
In August, the average daily maximum UV index in Boulder Hill is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In August, the maximum UV index of 5 suggests this advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures in Boulder Hill?
What is the most humid month in Boulder Hill?
What is the average humidity in August in Boulder Hill?
How many days does it rain in August in Boulder Hill?
When it does not snow in Boulder Hill?
How many hours of daylight does Boulder Hill have in August?
What time are sunrise and sunset in August in Boulder Hill?
How long on average sun shines in August in Boulder Hill?
What is the UV index intensity in August in Boulder Hill?
Average temperature in August
Boulder Hill, IL
- Average high temperature in August: 79.3°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 (28.4°F).
- Average low temperature in August: 62.4°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in August
Boulder Hill, 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
Boulder Hill, IL
- Average wind speed in August: 6mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in August
Boulder Hill, IL
- Average humidity in August: 83%
The months with the highest relative humidity are January, February, July and August (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in August
Boulder Hill, IL
- Average rainfall in August: 1.77"
The wettest month (with the highest rainfall) is June (2.24").
The driest months (with the least rainfall) are November and December (0.75").
Average rainfall days in August
Boulder Hill, IL
- Average rainfall days in August: 15 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in August
Boulder Hill, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Boulder Hill, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (10.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Boulder Hill, 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
Boulder Hill, IL
- Average sunshine days in August: 11.6 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in August
Boulder Hill, IL
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Boulder Hill, IL
- Average cloud cover in August: 33
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in August
Boulder Hill, 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).
Boulder Hill, Illinois, USA
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