August weather forecastGalena, IL
August
Weather in August
August weather in Galena marks the nearing end of the summer season. Although the temperature remains relatively high, a slight decline begins to emerge from the month's peak in July. The rainfall pattern takes a plunge, with a decrease observed from the amount in July. Sunshine continues to be abundant, resulting in extended outdoor activities. A slow transition towards cooler temperatures begins as the focus shifts to the upcoming autumn season.Temperature
As July turns into August, the average high-temperatures rest at a still moderately hot 78.6°F (25.9°C), showing a minor variation from the prior month. Nighttime temperature experiences an average drop to a refreshing 60.4°F (15.8°C) in August.Humidity
The average relative humidity in August is 81%.Rainfall
In August, the rain falls for 14.5 days. Throughout August, 2.24" (57mm) of precipitation is accumulated. In Galena, during the entire year, the rain falls for 153.1 days and collects up to 30.75" (781mm) of precipitation.Snowfall
In Galena, snow does not fall in May through September.Daylight
In Galena, the average length of the day in August is 13h and 51min.On the first day of the month, sunrise is at 5:54 am and sunset at 8:21 pm. On the last day of August, sunrise is at 6:26 am and sunset at 7:36 pm CDT.
Sunshine
With an average of 9.8h of sunshine, August has the most sunshine of the year.UV index
The average daily maximum UV index in August in Galena is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 5 in August translates into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Galena, IL
- Average high temperature in August: 78.6°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 (25°F).
- Average low temperature in August: 60.4°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure in August
Galena, 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 (29.9"Hg).
Average wind speed in August
Galena, IL
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in August
Galena, IL
- Average humidity in August: 81%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in August
Galena, IL
- Average rainfall in August: 2.24"
The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in August
Galena, IL
- Average rainfall days in August: 14.5 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in August
Galena, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (5.12").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Galena, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (13.2 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
Galena, 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 6min).
- Average sunshine in August: 9h and 48min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Galena, IL
- Average sunshine days in August: 13.4 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in August
Galena, 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
Galena, 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
Galena, IL
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
