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 welcomes an average high-temperature of a still moderately hot 80.2°F (26.8°C), not much different from the preceding month. Castleton observes an average nighttime temperature of 63.1°F (17.3°C) during August.Humidity
The average relative humidity in August is 82%.Rainfall
In Castleton, in August, during 10.5 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, in Castleton, there are 116.8 rainfall days, and 13.98" (355mm) of precipitation is accumulated.Snowfall
In Castleton, snow does not fall in May through September.Daylight
The average length of the day in August in Castleton is 13h and 46min.On the first day of August, sunrise is at 5:55 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 7:32 pm CDT.
Sunshine
In August, the average sunshine in Castleton is 9.8h.UV index
In August, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In August, the average maximum UV index of 5 translates into the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in August in Castleton?
What is the average humidity in August in Castleton?
How many days does it rain in August in Castleton?
When it does not snow in Castleton?
How many hours of daylight does Castleton have in August?
When are sunrise and sunset in August in Castleton?
How long on average sun shines in August in Castleton?
What is the UV index intensity in August in Castleton?
Average temperature in August
Castleton, IL
- Average high temperature in August: 80.2°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 (29.7°F).
- Average low temperature in August: 63.1°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in August
Castleton, 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
Castleton, IL
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in August
Castleton, IL
- Average humidity in August: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Castleton, IL
- Average rainfall in August: 1.02"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in August
Castleton, IL
- Average rainfall days in August: 10.5 days
The month with the highest number of rainy days is May (15.2 days).
The months with the least rainy days are January and February (4.2 days).
Average snowfall in August
Castleton, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Castleton, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.6 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
Castleton, 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 months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in August
Castleton, IL
- Average sunshine days in August: 17.6 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in August
Castleton, 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
Castleton, 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
Castleton, 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).
Castleton, Illinois, USA
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