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 warm 79.3°F (26.3°C), closely following the temperature pattern of July. Leland's nights in August cool down to an average low-temperature of 61.9°F (16.6°C).Humidity
In August, the average relative humidity is 84%.Rainfall
In Leland, in August, during 10.5 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. In Leland, during the entire year, the rain falls for 109.6 days and collects up to 10.31" (262mm) of precipitation.Snowfall
In Leland, snow does not fall in May through September.Daylight
The average length of the day in August is 13h and 48min.On the first day of August, sunrise is at 5:50 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:29 pm CDT.
Sunshine
The average sunshine in August is 9.6h.UV index
The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In August, a daily maximum UV index of 5 leads to the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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 much does it rain in August?
When it does not snow?
What is the average length of the day in August?
When are sunrise and sunset in August?
How long on average sun shines in August?
What is the UV index intensity in August in Leland?
Average temperature in August
Leland, IL
- Average high temperature in August: 79.3°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in August: 61.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in August
Leland, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Leland, IL
- Average wind speed in August: 6.1mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in August
Leland, IL
- Average humidity in August: 84%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Leland, IL
- Average rainfall in August: 0.83"
The wettest month (with the highest rainfall) is May (1.54").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in August
Leland, IL
- Average rainfall days in August: 10.5 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in August
Leland, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Leland, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Leland, IL
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 9h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in August
Leland, IL
- Average sunshine days in August: 16.9 days
The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is May (14.2 days).
Average UV index in August
Leland, 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
Leland, IL
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in August
Leland, IL
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Leland, Illinois, USA
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