August weather forecast
Montrose, IL

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Weather in August

The last month of the summer, August, is another warm month in Montrose, Illinois, with an average temperature varying between 64.8°F (18.2°C) and 82°F (27.8°C).

Temperature

Montrose marks the onset of August with an average high-temperature of a still warm 82°F (27.8°C), a subtle shift from July's 83.3°F (28.5°C). Montrose reports an average nighttime low-temperature of 64.8°F (18.2°C) in August.

Heat index

For August, the heat index is calculated to be a hot 89.6°F (32°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.

Humidity

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

Rainfall

In Montrose, in August, during 12.7 rainfall days, 2.09" (53mm) of precipitation is typically 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, Illinois, snow does not fall in May through October.

Daylight

In August, the average length of the day is 13h and 39min.
On the first day of August in Montrose, Illinois, 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 estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 6 during August translates into the following directions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Frequently asked questions

What are August temperatures in Montrose?

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. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 89.6°F (32°C).

What is the average humidity in August in Montrose?

The average relative humidity in August in Montrose is 81%.

How much does it rain in Montrose in August?

In Montrose, Illinois, in August, it is raining for 12.7 days, with typically 2.09" (53mm) of accumulated precipitation.

When it does not snow in Montrose?

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

What is the average length of the day in August in Montrose?

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

When are sunrise and sunset in August in Montrose?

On the first day of August in Montrose, 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 many hours of sunshine does Montrose have in August?

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

When is the highest UV index in Montrose?

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

What is the UV index reading in August in Montrose?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability 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
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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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Montrose, Illinois, USA

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