August weather forecast
Mason, IL

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Weather in August

The last month of the summer, August, is also a moderately hot month in Mason, Illinois, with an average temperature fluctuating between 82.2°F (27.9°C) and 64.9°F (18.3°C).

Temperature

The onset of August notes an average high-temperature of a still moderately hot 82.2°F (27.9°C), subtly shifted from July's 83.7°F (28.7°C). Mason anticipates an average minimum temperature of 64.9°F (18.3°C) in the month of August.

Heat index

Throughout August, the heat index is computed to be a hot 89.6°F (32°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

July and August, with an average relative humidity of 81%, are the most humid months.

Rainfall

In August, the rain falls for 12.5 days. Throughout August, 2.32" (59mm) of precipitation is accumulated. Throughout the year, in Mason, Illinois, there are 141.3 rainfall days, and 26.77" (680mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Mason.

Daylight

In Mason, the average length of the day in August is 13h and 38min.
On the first day of August in Mason, sunrise is at 5:56 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:25 pm CDT.

Sunshine

In Mason, Illinois, the average sunshine in August is 10h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In August, the maximum UV index of 6 suggests these recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Mason in August?

During August, Mason experiences an average high-temperature of 82.2°F (27.9°C) and a low-temperature of 64.9°F (18.3°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in August is computed to be 89.6°F (32°C).

What is the most humid month in Mason?

The months with the highest humidity in Mason, Illinois, are July and August, with an average relative humidity of 81%.

What is the average humidity in August in Mason?

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

How many days does it rain in August in Mason?

In Mason, in August, during 12.5 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

When it does not snow in Mason?

April through October are months without snowfall in Mason, Illinois.

How many hours of daylight does Mason have in August?

In August, the average day length in Mason is 13h and 38min.

When is the sunrise / sunset in August in Mason?

On the first day of August in Mason, sunrise is at 5:56 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:25 pm CDT.

How many hours of sunshine does Mason have in August?

The average sunshine duration in August in Mason is 10h.

What is the month with the highest UV index in Mason?

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

What is the UV index intensity in August in Mason?

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health 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
Mason, IL

Average temperature in August - Mason, IL
  • Average high temperature in August: 82.2°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.6°F).

  • Average low temperature in August: 64.9°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in August
Mason, IL

Average pressure in August - Mason, 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
Mason, IL

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

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in August
Mason, IL

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

The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Mason, IL

Average rainfall in August - Mason, IL
  • Average rainfall in August: 2.32"

The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is February (1.38").

Average rainfall days in August
Mason, IL

Average rainfall days in August - Mason, IL
  • Average rainfall days in August: 12.5 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in August
Mason, IL

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

The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Mason, IL

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

The month with the highest number of snowfall days is January (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
Mason, IL

Average daylight in August / Average sunshine in August - Mason, 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
Mason, IL

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

The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in August
Mason, IL

Average UV index in August - Mason, 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
Mason, IL

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

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

Average visibility in August
Mason, IL

Average visibility in August - Mason, 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).

Mason, Illinois, USA

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