August weather forecast
Windsor, IL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Windsor, Illinois, with temperature in the range of an average high of 81.7°F (27.6°C) and an average low of 64°F (17.8°C).

Temperature

In August, Windsor experiences a minor shift in meteorological conditions with average high-temperatures marked at a still warm 81.7°F (27.6°C), closely mirroring the climate in July. Throughout August nights, Windsor experiences a consistent temperature average of 64°F (17.8°C).

Heat index

The heat index value during August is computed to be a hot 87.8°F (31°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.

Humidity

The average relative humidity in August is 82%.

Rainfall

In August, the rain falls for 10.9 days. Throughout August, 1.22" (31mm) of precipitation is accumulated. In Windsor, during the entire year, the rain falls for 116.5 days and collects up to 11.54" (293mm) of precipitation.

Snowfall

In Windsor, snow does not fall in April through October.

Daylight

In August, the average length of the day is 13h and 40min.
On the first day of August, sunrise is at 5:54 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:26 pm CDT.

Sunshine

In August, the average sunshine is 9.8h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 6 in August translates into these instructions:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Jul 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in August?

During August, Windsor experiences an average high-temperature of 81.7°F (27.6°C) and a low-temperature of 64°F (17.8°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in August is computed to be 87.8°F (31°C).

What is the average humidity in August?

The average relative humidity in August is 82%.

How much does it rain in August?

In Windsor, in August, during 10.9 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.

When it does not snow?

In Windsor, snow does not fall in April through October.

How many hours of daylight does Windsor have in August?

In Windsor, the average day length in August is 13h and 40min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 5:54 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:26 pm CDT.

How many hours of sunshine does Windsor have in August?

The average sunshine duration in August is 9.8h.

What is the month with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the UV index reading in August?

The average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Windsor, IL

Average temperature in August - Windsor, IL
  • Average high temperature in August: 81.7°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in August: 64°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

Average pressure in August
Windsor, IL

Average pressure in August - Windsor, IL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in August
Windsor, IL

Average wind speed in August - Windsor, IL
  • Average wind speed in August: 6.2mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in August
Windsor, IL

Average humidity in August - Windsor, IL
  • Average humidity in August: 82%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).

Average rainfall in August
Windsor, IL

Average rainfall in August - Windsor, IL
  • Average rainfall in August: 1.22"

The wettest month (with the highest rainfall) is June (1.46").
The driest month (with the least rainfall) is February (0.55").

Average rainfall days in August
Windsor, IL

Average rainfall days in August - Windsor, IL
  • Average rainfall days in August: 10.9 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (4.9 days).

Average snowfall in August
Windsor, IL

Average snowfall in August - Windsor, IL
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Windsor, IL

Average snowfall days in August - Windsor, IL
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Windsor, IL

Average daylight in August / Average sunshine in August - Windsor, IL
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in August
Windsor, IL

Average sunshine days in August - Windsor, IL
  • Average sunshine days in August: 16.8 days

The month with the most sunshine days is December (22.1 days).
The month with the least sunshine days is June (13.5 days).

Average UV index in August
Windsor, IL

Average UV index in August - Windsor, IL
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August
Windsor, IL

Average cloud cover in August - Windsor, IL
  • Average cloud cover in August: 31

The months with the most cloud cover are January and February (Cloud cover 55).
The months with the least cloud cover are June and September (Cloud cover 30).

Average visibility in August
Windsor, IL

Average visibility in August - Windsor, IL
  • Average visibility in August: 5mi

The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).

Windsor, Illinois, USA

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