August weather forecast
Wentzville, MO

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Weather in August

August offers a continuation of the hot summer climate in Wentzville, with minimal variation from July. The temperature ascends to its second peak of 85.5°F (29.7°C), prior to the advent of eventual cooling. The continuity of rainfall manages the heat to a certain extent, averting any chances of severe drought. Despite the reduction in daylight hours, there’s abundant sunshine during the day. Light breezes provide necessary comfort during sweltering afternoons.

Temperature

The arrival of August marks a slight shift to an average high-temperature of a warm 85.5°F (29.7°C) from July's 87.1°F (30.6°C). Wentzville, in August, observes a steady average low-temperature of 66°F (18.9°C).

Heat index

Throughout August, the heat index is calculated to be a fiery hot 96.8°F (36°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to 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.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The average relative humidity in August is 76%.

Rainfall

In Wentzville, in August, during 14.5 rainfall days, 3.07" (78mm) of precipitation is typically accumulated. In Wentzville, during the entire year, the rain falls for 152.1 days and collects up to 32.01" (813mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in August is 13h and 38min.
On the first day of August, sunrise is at 6:05 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 7:34 pm CDT.

Sunshine

In Wentzville, Missouri, the average sunshine in August is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Wentzville. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily high UV index of 6 in August leads to these guidelines:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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Frequently asked questions

How hot is August in Wentzville?

In August, in Wentzville, the average high-temperature is 85.5°F (29.7°C), and the average low-temperature is 66°F (18.9°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 96.8°F (36°C).

What is the average humidity in August in Wentzville?

In August, the average relative humidity is 76%.

How much does it rain in Wentzville in August?

In Wentzville, in August, during 14.5 rainfall days, 3.07" (78mm) of precipitation is typically accumulated.

When it does not snow in Wentzville?

May through October are months without snowfall.

How many hours of daylight does Wentzville have in August?

The average day length in August in Wentzville, Missouri, is 13h and 38min.

When is the sunrise / sunset in August in Wentzville?

On the first day of August in Wentzville, sunrise is at 6:05 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 7:34 pm CDT.

How long on average sun shines in August in Wentzville?

In Wentzville, the average sunshine duration in August is 10.3h.

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

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

How high is the UV index in August in Wentzville?

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health threat from 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
Wentzville, MO

Average temperature in August - Wentzville, MO
  • Average high temperature in August: 85.5°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in August: 66°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

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Average pressure in August
Wentzville, MO

Average pressure in August - Wentzville, MO
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in August
Wentzville, MO

Average wind speed in August - Wentzville, MO
  • Average wind speed in August: 5.5mph

The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in August
Wentzville, MO

Average humidity in August - Wentzville, MO
  • Average humidity in August: 76%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in August
Wentzville, MO

Average rainfall in August - Wentzville, MO
  • Average rainfall in August: 3.07"

The wettest month (with the highest rainfall) is April (3.82").
The driest month (with the least rainfall) is February (1.77").

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Average rainfall days in August
Wentzville, MO

Average rainfall days in August - Wentzville, MO
  • Average rainfall days in August: 14.5 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in August
Wentzville, MO

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

The month with the highest snowfall is February (3.15").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Wentzville, MO

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

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Wentzville, MO
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in August
Wentzville, MO

Average sunshine days in August - Wentzville, MO
  • Average sunshine days in August: 14.7 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index in August
Wentzville, MO

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

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Average cloud cover in August
Wentzville, MO

Average cloud cover in August - Wentzville, MO
  • Average cloud cover in August: 27

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in August
Wentzville, MO

Average visibility in August - Wentzville, 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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Wentzville, Missouri, USA

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