August weather forecast
Montrose, IL

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Weather in August

August, the last month of the summer in Montrose, is also a moderately hot month, with an average temperature fluctuating between 64.8°F (18.2°C) and 82°F (27.8°C).

Temperature

Montrose indicates an average high-temperature of a still warm 82°F (27.8°C) in August, showing minor variation from July's 83.3°F (28.5°C). Throughout August nights, Montrose experiences a consistent temperature average of 64.8°F (18.2°C).

Heat index

August's heat index is evaluated at a tropical 89.6°F (32°C). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.
Heat index details are generally centered around shaded locations and a mild breeze. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. 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.

Humidity

In Montrose, Illinois, the average relative humidity in August is 81%.

Rainfall

In August, the rain falls for 12.7 days. Throughout August, 2.09" (53mm) of precipitation is accumulated. In Montrose, during the entire year, the rain falls for 135.9 days and collects up to 21.89" (556mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in August is 13h and 39min.
On the first day of August, sunrise is at 5:54 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:25 pm CDT.

Sunshine

In Montrose, the average sunshine in August is 10h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In August, the average maximum UV index of 6 translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.

Frequently asked questions

What is the usual temperature for Montrose in August?

In Montrose, 82°F (27.8°C) is the average high-temperature and 64.8°F (18.2°C) is the average low-temperature during August. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is evaluated at 89.6°F (32°C).

What is the average humidity in August?

In Montrose, the average relative humidity in August is 81%.

How much does it rain in August?

In Montrose, in August, during 12.7 rainfall days, 2.09" (53mm) of precipitation is typically accumulated.

When it does not snow in Montrose?

May through October are months without snowfall.

How many hours of daylight does Montrose have in August?

The average day length in August is 13h and 39min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 5:54 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:25 pm CDT.

How long on average sun shines in August?

In Montrose, the average sunshine duration in August is 10h.

What are the months with the highest UV index in Montrose?

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

What is the UV index reading in August?

In Montrose, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health risk from 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
Montrose, IL

Average temperature in August - Montrose, IL
  • Average high temperature in August: 82°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in August: 64.8°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average pressure in August
Montrose, IL

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Montrose, IL

Average wind speed in August - Montrose, IL
  • Average wind speed in August: 6.1mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6mph).

Average humidity in August
Montrose, IL

Average humidity in August - Montrose, IL
  • Average humidity in August: 81%

The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Montrose, IL

Average rainfall in August - Montrose, IL
  • Average rainfall in August: 2.09"

The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is February (1.06").

Average rainfall days in August
Montrose, IL

Average rainfall days in August - Montrose, IL
  • Average rainfall days in August: 12.7 days

The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (6.9 days).

Average snowfall in August
Montrose, IL

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

The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Montrose, IL

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

The month with the highest number of snowfall days is February (5.3 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
Montrose, IL

Average daylight in August / Average sunshine in August - Montrose, 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 30min).

  • Average sunshine in August: 10h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in August
Montrose, IL

Average sunshine days in August - Montrose, IL
  • Average sunshine days in August: 14.4 days

The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (12.9 days).

Average UV index in August
Montrose, IL

Average UV index in August - Montrose, 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
Montrose, IL

Average cloud cover in August - Montrose, IL
  • Average cloud cover in August: 30

The months with the most cloud cover are January and February (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).

Average visibility in August
Montrose, IL

Average visibility in August - Montrose, 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).

Montrose, Illinois, USA

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