August weather forecast
Cottonwood, IL

Share

Weather in August

August, the last month of the summer in Cottonwood, is another warm month, with an average temperature ranging between min 66.2°F (19°C) and max 84.9°F (29.4°C).

Temperature

August commences with an average high-temperature of a warm 84.9°F (29.4°C), showing little deviation from July's 86.2°F (30.1°C). Throughout the nights in August, Cottonwood experiences an average low-temperature of 66.2°F (19°C).

Heat index

August's heat index is evaluated at a fiery hot 95°F (35°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In Cottonwood, the average relative humidity in August is 77%.

Rainfall

In Cottonwood, in August, during 13.3 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Cottonwood, during the entire year, the rain falls for 146.3 days and collects up to 24.96" (634mm) of precipitation.

Snowfall

In Cottonwood, snow does not fall in May through October.

Daylight

The average length of the day in August is 13h and 35min.
On the first day of the month, sunrise is at 5:56 am and sunset at 8:01 pm. On the last day of August, sunrise is at 6:22 am and sunset at 7:23 pm CDT.

Sunshine

The average sunshine in August is 10.4h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 6 in August translates into this advice:
Fend off overexposure. Sun protection is vital. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.
[Resources]

Frequently asked questions

Is it hot in Cottonwood during August?

Cottonwood in August has an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 66.2°F (19°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, in August is evaluated at 95°F (35°C).

What is the average humidity in August in Cottonwood?

In Cottonwood, Illinois, the average relative humidity in August is 77%.

How much does it rain in Cottonwood in August?

In Cottonwood, Illinois, in August, during 13.3 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

When it does not snow in Cottonwood?

In Cottonwood, Illinois, snow does not fall in May through October.

How many hours of daylight does Cottonwood have in August?

In August, the average day length is 13h and 35min.

What time are sunrise and sunset in August in Cottonwood?

On the first day of August in Cottonwood, Illinois, sunrise is at 5:56 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:23 pm CDT.

How long on average sun shines in August in Cottonwood?

The average sunshine duration in August in Cottonwood, Illinois, is 10.4h.

When is the highest UV index in Cottonwood?

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

What is the UV index reading in August in Cottonwood?

In Cottonwood, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to UV radiation.
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
Cottonwood, IL

Average temperature in August - Cottonwood, IL
  • Average high temperature in August: 84.9°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in August: 66.2°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

[Resources]

Average pressure in August
Cottonwood, IL

Average pressure in August - Cottonwood, IL
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

[Resources]

Average wind speed in August
Cottonwood, IL

Average wind speed in August - Cottonwood, IL
  • Average wind speed in August: 5.8mph

The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

[Resources]

Average humidity in August
Cottonwood, IL

Average humidity in August - Cottonwood, IL
  • Average humidity in August: 77%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (70%).

[Resources]

Average rainfall in August
Cottonwood, IL

Average rainfall in August - Cottonwood, IL
  • Average rainfall in August: 1.77"

The wettest month (with the highest rainfall) is April (3.27").
The driest month (with the least rainfall) is September (1.14").

[Resources]

Average rainfall days in August
Cottonwood, IL

Average rainfall days in August - Cottonwood, IL
  • Average rainfall days in August: 13.3 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).

[Resources]

Average snowfall in August
Cottonwood, IL

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

The month with the highest snowfall is February (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in August
Cottonwood, IL

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

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

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

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

[Resources]

Average sunshine days in August
Cottonwood, IL

Average sunshine days in August - Cottonwood, IL
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).

[Resources]

Average UV index in August
Cottonwood, IL

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

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

[Resources]

Average cloud cover in August
Cottonwood, IL

Average cloud cover in August - Cottonwood, IL
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).

[Resources]

Average visibility in August
Cottonwood, IL

Average visibility in August - Cottonwood, IL
  • Average visibility in August: 6mi

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

[Resources]

Cottonwood, Illinois, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location