August weather forecast
Vienna, MO

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Weather in August

August, the last month of the summer in Vienna, is another hot month, with an average temperature fluctuating between 65.8°F (18.8°C) and 87.3°F (30.7°C).

Temperature

Vienna's shift from July to August is accompanied by an average high-temperature of a still hot 87.3°F (30.7°C), a slight deviation from 89.1°F (31.7°C). In the month of August, Vienna's average low-temperature falls to an enjoyable 65.8°F (18.8°C).

Heat index

In August, the average heat index is appraised at a very hot 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. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Vienna, Missouri, the average relative humidity in August is 74%.

Rainfall

In August, the rain falls for 15.2 days. Throughout August, 2.68" (68mm) of precipitation is accumulated. Throughout the year, there are 147.2 rainfall days, and 31.02" (788mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Vienna.

Daylight

In August, the average length of the day in Vienna is 13h and 36min.
On the first day of the month, sunrise is at 6:11 am and sunset at 8:17 pm. On the last day of August, in Vienna, sunrise is at 6:37 am and sunset at 7:38 pm CDT.

Sunshine

In August, the average sunshine is 10.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Vienna. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 6 during August translates into the following directions:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

How hot does it get in Vienna in August?

In Vienna, in August, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 65.8°F (18.8°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 100.4°F (38°C).

What is the average humidity in August in Vienna?

The average relative humidity in August in Vienna, Missouri, is 74%.

How many days does it rain in August in Vienna?

In Vienna, in August, it is raining for 15.2 days, with typically 2.68" (68mm) of accumulated precipitation.

When it does not snow in Vienna?

May through September are months without snowfall in Vienna.

How many hours of daylight does Vienna have in August?

The average day length in August in Vienna is 13h and 36min.

What time are sunrise and sunset in August in Vienna?

On the first day of August, sunrise is at 6:11 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:38 pm CDT.

How long on average sun shines in August in Vienna?

In August, the average sunshine duration is 10.2h.

When is the highest UV index in Vienna?

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

What is the UV index intensity in August in Vienna?

In Vienna, Missouri, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health risk 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
Vienna, MO

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

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (39.2°F).

  • Average low temperature in August: 65.8°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).

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Average pressure in August
Vienna, MO

Average pressure in August - Vienna, MO
  • 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 (29.92"Hg).

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Average wind speed in August
Vienna, MO

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

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in August
Vienna, MO

Average humidity in August - Vienna, MO
  • Average humidity in August: 74%

The months with the highest relative humidity are March and May (77%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in August
Vienna, MO

Average rainfall in August - Vienna, MO
  • Average rainfall in August: 2.68"

The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is November (1.65").

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Average rainfall days in August
Vienna, MO

Average rainfall days in August - Vienna, MO
  • Average rainfall days in August: 15.2 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is December (7 days).

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Average snowfall in August
Vienna, MO

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

The month with the highest snowfall is February (3.46").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in August
Vienna, MO

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

The month with the highest number of snowfall days is January (7.4 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
Vienna, MO

Average daylight in August / Average sunshine in August - Vienna, 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 36min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in August
Vienna, MO

Average sunshine days in August - Vienna, MO
  • Average sunshine days in August: 13.7 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.4 days).

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Average UV index in August
Vienna, MO

Average UV index in August - Vienna, 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
Vienna, MO

Average cloud cover in August - Vienna, MO
  • Average cloud cover in August: 30

The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in August
Vienna, MO

Average visibility in August - Vienna, MO
  • Average visibility in August: 6mi

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

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Vienna, Missouri, USA

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