August weather forecastGeneva, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Geneva, Illinois, with an average temperature fluctuating between 79.5°F (26.4°C) and 62.8°F (17.1°C).Temperature
Geneva's shift into August sets the average high-temperature at a still moderately hot 79.5°F (26.4°C), a figure that deviates only slightly from July's 81°F (27.2°C). Geneva in August anticipates an average nighttime temperature of 62.8°F (17.1°C).Humidity
In Geneva, Illinois, the average relative humidity in August is 81%.Rainfall
In August, the rain falls for 10.6 days. Throughout August, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 101.9 rainfall days, and 8.58" (218mm) of precipitation is accumulated.Snowfall
In Geneva, snow does not fall in May through September.Daylight
In August, the average length of the day is 13h and 49min.On the first day of August, sunrise is at 5:47 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:27 pm CDT.
Sunshine
In August, the average sunshine is 9.8h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In August, the UV index of 6 transforms into the following advice:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Geneva, IL
- Average high temperature in August: 79.5°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in August: 62.8°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 (16.2°F).
Average pressure in August
Geneva, 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
Geneva, IL
- Average wind speed in August: 6.1mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in August
Geneva, IL
- Average humidity in August: 81%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in August
Geneva, IL
- Average rainfall in August: 0.67"
The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are November and December (0.39").
Average rainfall days in August
Geneva, IL
- Average rainfall days in August: 10.6 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.4 days).
Average snowfall in August
Geneva, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Geneva, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Geneva, 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 48min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Geneva, IL
- Average sunshine days in August: 16.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in August
Geneva, 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
Geneva, IL
- Average cloud cover in August: 33
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in August
Geneva, IL
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
