August weather forecast
Wheaton, MO

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Weather in August

The last month of the summer, August, is another tropical month in Wheaton, Missouri, with an average temperature fluctuating between 87.3°F (30.7°C) and 66.7°F (19.3°C).

Temperature

The shift into August records an average high-temperature of a still hot 87.3°F (30.7°C), subtly varied from July's 88.9°F (31.6°C). Throughout August, an average low-temperature of 66.7°F (19.3°C) is experienced in Wheaton.

Heat index

August's heat index is estimated at a sweltering 100.4°F (38°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The months with the lowest humidity in Wheaton are January, July, August and October, with an average relative humidity of 73%.

Rainfall

In August, the rain falls for 15.3 days. Throughout August, 3.35" (85mm) of precipitation is accumulated. Throughout the year, in Wheaton, there are 152.1 rainfall days, and 34.45" (875mm) of precipitation is accumulated.

Snowfall

In Wheaton, Missouri, snow does not fall in June through October.

Daylight

The average length of the day in August in Wheaton is 13h and 31min.
On the first day of the month, sunrise is at 6:22 am and sunset at 8:22 pm. On the last day of August, in Wheaton, sunrise is at 6:47 am and sunset at 7:45 pm CDT.

Sunshine

The average sunshine in August in Wheaton is 10.5h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

Is it hot in Wheaton during August?

An average high-temperature, in August, in Wheaton, is 87.3°F (30.7°C) and the average low-temperature is 66.7°F (19.3°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is estimated at 100.4°F (38°C).

What are the least humid months in Wheaton?

The months with the lowest humidity in Wheaton, Missouri, are January, July, August and October, with an average relative humidity of 73%.

What is the average humidity in August in Wheaton?

The average relative humidity in August is 73%.

How much does it rain in Wheaton in August?

In Wheaton, Missouri, during August, the rain falls for 15.3 days and regularly aggregates up to 3.35" (85mm) of precipitation.

When it does not snow in Wheaton?

In Wheaton, snow does not fall in June through October.

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

In August, the average day length in Wheaton is 13h and 31min.

When are sunrise and sunset in August in Wheaton?

In August, on the first day of the month, sunrise is at 6:22 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 7:45 pm CDT.

How many hours of sunshine does Wheaton have in August?

The average sunshine duration in August in Wheaton is 10.5h.

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

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

What is the UV index intensity in August in Wheaton?

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

Average temperature in August - Wheaton, MO
  • Average high temperature in August: 87.3°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (42.4°F).

  • Average low temperature in August: 66.7°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (27°F).

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Average pressure in August
Wheaton, MO

Average pressure in August - Wheaton, MO
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in August
Wheaton, MO

Average wind speed in August - Wheaton, MO
  • Average wind speed in August: 6.8mph

The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in August
Wheaton, MO

Average humidity in August - Wheaton, MO
  • Average humidity in August: 73%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, July, August and October (73%).

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Average rainfall in August
Wheaton, MO

Average rainfall in August - Wheaton, MO
  • Average rainfall in August: 3.35"

The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is February (1.65").

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Average rainfall days in August
Wheaton, MO

Average rainfall days in August - Wheaton, MO
  • Average rainfall days in August: 15.3 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in August
Wheaton, MO

Average snowfall in August - Wheaton, MO
  • Average snowfall in August: 0"

The months with the highest snowfall are January and February (2.17").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Wheaton, MO

Average snowfall days in August - Wheaton, MO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Wheaton, MO

Average daylight in August / Average sunshine in August - Wheaton, MO
  • Average daylight in August: 13h and 3min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in August: 10h and 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

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Average sunshine days in August
Wheaton, MO

Average sunshine days in August - Wheaton, MO
  • Average sunshine days in August: 13.8 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is July (11.4 days).

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Average UV index in August
Wheaton, MO

Average UV index in August - Wheaton, MO
  • Average UV index in August: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in August
Wheaton, MO

Average cloud cover in August - Wheaton, MO
  • Average cloud cover in August: 26

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 26).

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Average visibility in August
Wheaton, MO

Average visibility in August - Wheaton, MO
  • 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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Wheaton, Missouri, USA

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