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
River Grove's weather in August displays an average high-temperature of a still moderately hot 79.3°F (26.3°C), showing minor disparity from July's 79.7°F (26.5°C). In August, River Grove's temperature tends to fall to an average low of 66.7°F (19.3°C) during the night.Humidity
In August, the average relative humidity in River Grove is 74%.Rainfall
In River Grove, in August, it is raining for 16.4 days, with typically 3.5" (89mm) of accumulated precipitation. In River Grove, during the entire year, the rain falls for 157.8 days and collects up to 33.7" (856mm) of precipitation.Snowfall
June through September are months without snowfall in River Grove.Daylight
In River Grove, the average length of the day in August is 13h and 49min.On the first day of the month, sunrise is at 5:45 am and sunset at 8:09 pm. On the last day of August, in River Grove, Illinois, sunrise is at 6:16 am and sunset at 7:26 pm CDT.
Sunshine
The month with the most sunshine in River Grove is August, with an average of 10.6h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in River Grove, Illinois. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A daily maximum UV index of 6 in August translates into the following instructions:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for River Grove in August?
What is the average humidity in August in River Grove?
How many days does it rain in August in River Grove?
When it does not snow in River Grove?
How many hours of daylight does River Grove have in August?
When are sunrise and sunset in August in River Grove?
What month has the most sunshine in River Grove?
How long on average sun shines in August in River Grove?
What are the months with the highest UV index in River Grove?
What is the UV index reading in August in River Grove?
Average temperature in August
River Grove, IL
- Average high temperature in August: 79.3°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 (28.9°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 (19.4°F).
Average pressure in August
River Grove, 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
River Grove, IL
- Average wind speed in August: 7mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in August
River Grove, 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
River Grove, IL
- Average rainfall in August: 3.5"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days in August
River Grove, IL
- Average rainfall days in August: 16.4 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in August
River Grove, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
River Grove, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
River Grove, 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: 10h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
River Grove, IL
- Average sunshine days in August: 11.8 days
The month with the most sunshine days is December (16.7 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in August
River Grove, 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
River Grove, IL
- Average cloud cover in August: 27
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
River Grove, 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).
River Grove, Illinois, USA
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