August weather forecastManhattan, IL
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Manhattan, Illinois, with an average temperature fluctuating between 80.2°F (26.8°C) and 63.3°F (17.4°C).Temperature
The average high-temperature in August, at a still warm 80.2°F (26.8°C), reveals a modest deviation from July's 81.7°F (27.6°C). The month of August records an average low-temperature of 63.3°F (17.4°C).Humidity
In Manhattan, the average relative humidity in August is 81%.Rainfall
In August, the rain falls for 15.2 days. Throughout August, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 149.8 rainfall days, and 31.26" (794mm) of precipitation is accumulated.Snowfall
In Manhattan, snow does not fall in May through September.Daylight
The average length of the day in August is 13h and 47min.On the first day of August, sunrise is at 5:47 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:26 pm CDT.
Sunshine
With an average of 9.6h of sunshine, August has the most sunshine of the year.UV index
In Manhattan, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 5 in August, converts into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Manhattan, IL
- Average high temperature in August: 80.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in August: 63.3°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 (17.4°F).
Average pressure in August
Manhattan, 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
Manhattan, IL
- Average wind speed in August: 6mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in August
Manhattan, IL
- Average humidity in August: 81%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in August
Manhattan, IL
- Average rainfall in August: 2.6"
The wettest month (with the highest rainfall) is May (4.21").
The driest months (with the least rainfall) are February and December (1.61").
Average rainfall days in August
Manhattan, IL
- Average rainfall days in August: 15.2 days
The months with the highest number of rainy days are June and July (17.3 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in August
Manhattan, 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
Manhattan, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.3 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
Manhattan, IL
- Average daylight in August: 13h and 48min
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 36min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Manhattan, IL
- Average sunshine days in August: 12.9 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in August
Manhattan, 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
Manhattan, IL
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in August
Manhattan, IL
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
