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 initiation of August records an average high-temperature of a still warm 80.2°F (26.8°C), displaying a near consistency with the previous month. Nighttime temperature in Eureka experiences an average drop to an enjoyable 63.1°F (17.3°C) in August.Humidity
The average relative humidity in August is 83%.Rainfall
In Eureka, in August, it is raining for 15 days, with typically 2.17" (55mm) of accumulated precipitation. In Eureka, during the entire year, the rain falls for 147.1 days and collects up to 24.17" (614mm) of precipitation.Snowfall
In Eureka, Illinois, snow does not fall in May through September.Daylight
In August, the average length of the day is 13h and 44min.On the first day of the month, sunrise is at 5:54 am and sunset at 8:12 pm. On the last day of August, in Eureka, sunrise is at 6:23 am and sunset at 7:30 pm CDT.
Sunshine
In August, the average sunshine in Eureka is 9.9h.UV index
In Eureka, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 5 during August translates into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Eureka in August?
What is the average humidity in August in Eureka?
How many days does it rain in August in Eureka?
When it does not snow in Eureka?
How many hours of daylight does Eureka have in August?
When are sunrise and sunset in August in Eureka?
How long on average sun shines in August in Eureka?
What is the UV index reading in August in Eureka?
Average temperature in August
Eureka, IL
- Average high temperature in August: 80.2°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in August: 63.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in August
Eureka, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Eureka, IL
- Average wind speed in August: 6.5mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in August
Eureka, IL
- Average humidity in August: 83%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Eureka, IL
- Average rainfall in August: 2.17"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.22").
Average rainfall days in August
Eureka, IL
- Average rainfall days in August: 15 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in August
Eureka, IL
- Average snowfall in August: 0"
The months with the highest snowfall are January and February (2.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Eureka, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (11 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
Eureka, IL
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 9h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in August
Eureka, IL
- Average sunshine days in August: 11.7 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9 days).
Average UV index in August
Eureka, 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, February, November and December (UV index 2).
Average cloud cover in August
Eureka, IL
- Average cloud cover in August: 31
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in August
Eureka, 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).
Eureka, Illinois, USA
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