August weather forecast
Morton, IL

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Weather in August

The last month of the summer, August, is another warm month in Morton, Illinois, with temperature in the range of an average low of 63.3°F (17.4°C) and an average high of 80.8°F (27.1°C).

Temperature

The commencement of August records an average high-temperature of a still warm 80.8°F (27.1°C), barely varying from July's 81.9°F (27.7°C). During August, Morton experiences a consistent low-temperature average of 63.3°F (17.4°C).

Heat index

August's average heat index is computed to be a tropical 86°F (30°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.

Humidity

In August, the average relative humidity is 82%.

Rainfall

In Morton, during August, the rain falls for 11.9 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, there are 127.2 rainfall days, and 16.77" (426mm) of precipitation is accumulated.

Snowfall

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

Daylight

In August, the average length of the day is 13h and 44min.
On the first day of August, sunrise is at 5:55 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:31 pm CDT.

Sunshine

The average sunshine in August is 9.8h.

UV index

The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, a regular UV index of 5 translates into these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Updated: Jul 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Morton in August?

In August, the average high-temperature and low-temperature are 80.8°F (27.1°C) and 63.3°F (17.4°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in August is computed to be 86°F (30°C).

What is the average humidity in August?

In August, the average relative humidity is 82%.

How much does it rain in August?

In August, the rain falls for 11.9 days. Throughout August, 1.26" (32mm) of precipitation is accumulated.

When it does not snow?

May through October are months without snowfall in Morton.

How many hours of daylight does Morton have in August?

In August, the average day length is 13h and 44min.

When are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 5:55 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:31 pm CDT.

How long on average sun shines in August?

In August, the average sunshine duration in Morton, Illinois, is 9.8h.

How high is the UV index in August?

In Morton, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's 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
Morton, IL

Average temperature in August - Morton, IL
  • Average high temperature in August: 80.8°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in August: 63.3°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in August
Morton, IL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in August
Morton, IL

Average wind speed in August - Morton, IL
  • Average wind speed in August: 6.5mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in August
Morton, IL

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

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Morton, IL

Average rainfall in August - Morton, IL
  • Average rainfall in August: 1.26"

The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are February and December (0.83").

Average rainfall days in August
Morton, IL

Average rainfall days in August - Morton, IL
  • Average rainfall days in August: 11.9 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (4.8 days).

Average snowfall in August
Morton, IL

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

The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Morton, IL

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

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

Average sunshine days in August
Morton, IL

Average sunshine days in August - Morton, IL
  • Average sunshine days in August: 16.7 days

The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is May (11.4 days).

Average UV index in August
Morton, IL

Average UV index in August - Morton, 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, February, November and December (UV index 2).

Average cloud cover in August
Morton, IL

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

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).

Average visibility in August
Morton, IL

Average visibility in August - Morton, 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).

Morton, Illinois, USA

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