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 weather records an average high-temperature of a still warm 80.1°F (26.7°C), showing little deviation from July. In Posen, the average temperature during the nights of August drops to a comfortable 64.6°F (18.1°C).Humidity
The average relative humidity in August in Posen is 78%.Rainfall
In Posen, in August, it is raining for 14.8 days, with typically 2.56" (65mm) of accumulated precipitation. In Posen, Illinois, during the entire year, the rain falls for 155.6 days and collects up to 31.3" (795mm) of precipitation.Snowfall
May through September are months without snowfall in Posen.Daylight
In Posen, the average length of the day in August is 13h and 48min.On the first day of the month, sunrise is at 5:45 am and sunset at 8:08 pm. On the last day of August, in Posen, sunrise is at 6:16 am and sunset at 7:25 pm CDT.
Sunshine
August has the most sunshine of the year in Posen, with an average of 10.1h of sunshine.UV index
The average daily maximum UV index in August in Posen, Illinois, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 5 during August leads to these advisories:
Take precautions - Protection against sun damage is advised. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Posen in August?
What is the average humidity in August in Posen?
How many days does it rain in August in Posen?
When it does not snow in Posen?
How many hours of daylight does Posen have in August?
When is the sunrise / sunset in August in Posen?
What month has the most sunshine in Posen?
How long on average sun shines in August in Posen?
How high is the UV index in August in Posen?
Average temperature in August
Posen, IL
- Average high temperature in August: 80.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in August: 64.6°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in August
Posen, 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
Posen, IL
- Average wind speed in August: 6.3mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in August
Posen, IL
- Average humidity in August: 78%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Posen, IL
- Average rainfall in August: 2.56"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days in August
Posen, IL
- Average rainfall days in August: 14.8 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in August
Posen, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Posen, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Posen, 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: 10h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Posen, IL
- Average sunshine days in August: 13.3 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.2 days).
Average UV index in August
Posen, 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 December (UV index 1).
Average cloud cover in August
Posen, IL
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in August
Posen, IL
- Average visibility in August: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Posen, Illinois, USA
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