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
The arrival of August brings an average high-temperature of a still moderately hot 80.1°F (26.7°C), nearly identical to July's 81.3°F (27.4°C). River Forest's average low-temperature is measured at a comfortable 62.4°F (16.9°C) during August.Humidity
In River Forest, Indiana, the average relative humidity in August is 82%.Rainfall
In August, the rain falls for 14.6 days. Throughout August, 1.97" (50mm) of precipitation is accumulated. In River Forest, during the entire year, the rain falls for 142.1 days and collects up to 20.91" (531mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in August is 13h and 43min.On the first day of the month, sunrise is at 6:41 am and sunset at 8:56 pm. On the last day of August, sunrise is at 7:10 am and sunset at 8:15 pm EDT.
Sunshine
In August, the average sunshine is 9.5h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In August, an average UV index of 6 transforms into the following instructions:
Inhibit overexposure. Warding off sun damage is of utmost importance. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average August temperature?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What is the average length of the day in August?
What time are sunrise and sunset in August?
How many hours of sunshine does River Forest have in August?
What are the months with the highest UV index in River Forest?
What is the UV index intensity in August?
Average temperature in August
River Forest, IN
- Average high temperature in August: 80.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in August: 62.4°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 (20.5°F).
Average pressure in August
River Forest, IN
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
River Forest, IN
- Average wind speed in August: 5.9mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in August
River Forest, IN
- Average humidity in August: 82%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in August
River Forest, IN
- Average rainfall in August: 1.97"
The wettest month (with the highest rainfall) is May (2.68").
The driest months (with the least rainfall) are February and November (1.14").
Average rainfall days in August
River Forest, IN
- Average rainfall days in August: 14.6 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in August
River Forest, IN
- Average snowfall in August: 0"
The months with the highest snowfall are February and December (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
River Forest, IN
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (10.4 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 Forest, IN
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in August: 9h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
River Forest, IN
- Average sunshine days in August: 13.2 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in August
River Forest, IN
- 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, February, October, November and December (UV index 2).
Average cloud cover in August
River Forest, IN
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are June, July and August (Cloud cover 32).
Average visibility in August
River Forest, IN
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
River Forest, Indiana, USA
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