August weather forecast
Montgomery, IL

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Weather in August

The last month of the summer, August, is another warm month in Montgomery, Illinois, with an average temperature ranging between min 62.4°F (16.9°C) and max 79.3°F (26.3°C).

Temperature

Montgomery observes a minor difference in average high-temperatures between July's 81.1°F (27.3°C) and August's 79.3°F (26.3°C). Montgomery in August anticipates an average nighttime temperature of 62.4°F (16.9°C).

Humidity

The months with the highest humidity are January, February, July and August, with an average relative humidity of 83%.

Rainfall

In Montgomery, in August, during 15 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Montgomery, during the entire year, the rain falls for 133.1 days and collects up to 16.93" (430mm) of precipitation.

Snowfall

In Montgomery, snow does not fall in May through September.

Daylight

The average length of the day in August is 13h and 49min.
On the first day of August, sunrise is at 5:48 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 7:27 pm CDT.

Sunshine

In Montgomery, the average sunshine in August is 9.7h.

UV index

In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 during August translates into the following directions:
Take necessary precautions - Suggestions to elude sunburn are provided. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are August temperatures?

The average high-temperature and low-temperature during August are 79.3°F (26.3°C) and 62.4°F (16.9°C) respectively. In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, is calculated to be 87.8°F (31°C).

What is the most humid month?

January, February, July and August, with an average relative humidity of 83%, are most humid months.

What is the average humidity in August?

The average relative humidity in August in Montgomery is 83%.

How many days does it rain in August?

In August, the rain falls for 15 days. Throughout August, 1.77" (45mm) of precipitation is accumulated.

When it does not snow?

May through September are months without snowfall.

How many hours of daylight does Montgomery have in August?

In August, the average day length is 13h and 49min.

When are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 5:48 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 7:27 pm CDT.

How long on average sun shines in August?

In Montgomery, the average sunshine duration in August is 9.7h.

What is the UV index reading in August?

In August, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat 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
Montgomery, IL

Average temperature in August - Montgomery, IL
  • Average high temperature in August: 79.3°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in August: 62.4°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

Average pressure in August
Montgomery, IL

Average pressure in August - Montgomery, 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
Montgomery, IL

Average wind speed in August - Montgomery, IL
  • Average wind speed in August: 6mph

The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in August
Montgomery, IL

Average humidity in August - Montgomery, IL
  • Average humidity in August: 83%

The months with the highest relative humidity are January, February, July and August (83%).
The month with the lowest relative humidity is October (74%).

Average rainfall in August
Montgomery, IL

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

The wettest month (with the highest rainfall) is June (2.24").
The driest months (with the least rainfall) are November and December (0.75").

Average rainfall days in August
Montgomery, IL

Average rainfall days in August - Montgomery, IL
  • Average rainfall days in August: 15 days

The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in August
Montgomery, IL

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

The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Montgomery, IL

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

The month with the highest number of snowfall days is January (10.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Montgomery, IL
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in August
Montgomery, IL

Average sunshine days in August - Montgomery, IL
  • Average sunshine days in August: 11.6 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.2 days).

Average UV index in August
Montgomery, IL

Average UV index in August - Montgomery, 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
Montgomery, IL

Average cloud cover in August - Montgomery, IL
  • Average cloud cover in August: 33

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).

Average visibility in August
Montgomery, IL

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

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

Montgomery, Illinois, USA

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