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
August's presence records an average high-temperature of a still warm 79.5°F (26.4°C), closely mirroring July's climate. Seneca experiences an average temperature drop to an enjoyable 62.1°F (16.7°C) during August nights.Humidity
The average relative humidity in August in Seneca is 84%.Rainfall
In Seneca, in August, during 15 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Seneca, during the entire year, the rain falls for 154.1 days and collects up to 31.73" (806mm) of precipitation.Snowfall
May through September are months without snowfall in Seneca, Illinois.Daylight
The average length of the day in August is 13h and 47min.On the first day of the month, sunrise is at 5:50 am and sunset at 8:11 pm. On the last day of August, in Seneca, sunrise is at 6:20 am and sunset at 7:28 pm CDT.
Sunshine
June and August, with an average of 9.8h of sunshine, are months with the most sunshine in Seneca.UV index
The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum UV index of 5 in August translates into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures in Seneca?
What is the average humidity in August in Seneca?
How much does it rain in Seneca in August?
When it does not snow in Seneca?
What is the average length of the day in August in Seneca?
What time are sunrise and sunset in August in Seneca?
What are the months with the most sunshine in Seneca?
How long on average sun shines in August in Seneca?
What is the UV index reading in August in Seneca?
Average temperature in August
Seneca, 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 (29.1°F).
- Average low temperature in August: 62.1°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 (17.2°F).
Average pressure in August
Seneca, 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
Seneca, IL
- Average wind speed in August: 6.1mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in August
Seneca, 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 (72%).
Average rainfall in August
Seneca, IL
- Average rainfall in August: 2.28"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in August
Seneca, IL
- Average rainfall days in August: 15 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in August
Seneca, IL
- Average snowfall in August: 0"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Seneca, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (11.9 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
Seneca, 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 18min).
- Average sunshine in August: 9h and 5min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in August
Seneca, IL
- Average sunshine days in August: 13.3 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in August
Seneca, IL
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Seneca, IL
- Average cloud cover in August: 33
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in August
Seneca, 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).
Seneca, Illinois, USA
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