August weather forecastRochelle, IL
August
Weather in August
August, the last month of the summer in Rochelle, is also a moderately hot month, with an average temperature fluctuating between 61.2°F (16.2°C) and 78.3°F (25.7°C).Temperature
August ushers in an average high-temperature of a still moderately hot 78.3°F (25.7°C), aligning closely with the preceding month. Rochelle's nights in August experience an average temperature drop to a refreshing 61.2°F (16.2°C).Humidity
In Rochelle, the average relative humidity in August is 84%.Rainfall
In August, the rain falls for 12.4 days. Throughout August, 1.26" (32mm) of precipitation is accumulated. In Rochelle, during the entire year, the rain falls for 124.5 days and collects up to 14.49" (368mm) of precipitation.Snowfall
May through September are months without snowfall in Rochelle.Daylight
In August, the average length of the day is 13h and 49min.On the first day of the month, sunrise is at 5:50 am and sunset at 8:14 pm. On the last day of August, in Rochelle, Illinois, sunrise is at 6:21 am and sunset at 7:30 pm CDT.
Sunshine
In August, the average sunshine is 9.4h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 5 during August translates into the following directions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Rochelle, IL
- Average high temperature in August: 78.3°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in August: 61.2°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure in August
Rochelle, IL
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Rochelle, IL
- Average wind speed in August: 6.3mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in August
Rochelle, IL
- Average humidity in August: 84%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in August
Rochelle, IL
- Average rainfall in August: 1.26"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in August
Rochelle, IL
- Average rainfall days in August: 12.4 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in August
Rochelle, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Rochelle, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (10.3 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
Rochelle, IL
- Average daylight in August: 13h and 48min
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 24min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Rochelle, IL
- Average sunshine days in August: 16.8 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in August
Rochelle, IL
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Rochelle, IL
- Average cloud cover in August: 35
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in August
Rochelle, IL
- Average visibility in August: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
