August weather forecast
Vandalia, MT

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Weather in August

August, the last month of the summer in Vandalia, is another warm month, with temperature in the range of an average low of 62.4°F (16.9°C) and an average high of 81.7°F (27.6°C).

Temperature

Vandalia's weather, upon August's arrival, documents an average high-temperature of a still moderately hot 81.7°F (27.6°C), nearly identical to the prior month. Vandalia sees an average low-temperature of 62.4°F (16.9°C) during August.

Heat index

For most parts of August, the heat index is estimated at 80.6°F (27°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

The least humid month in Vandalia is August, with an average relative humidity of 42%.

Rainfall

In Vandalia, during August, the rain falls for 10 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Vandalia, during the entire year, the rain falls for 90.8 days and collects up to 11.1" (282mm) of precipitation.

Snowfall

In Vandalia, snow does not fall in June through September.

Daylight

In Vandalia, Montana, the average length of the day in August is 14h and 16min.
On the first day of August in Vandalia, sunrise is at 5:43 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 6:24 am and sunset at 7:50 pm MDT.

Sunshine

In August, the average sunshine in Vandalia is 11.6h.

UV index

The average daily maximum UV index in August in Vandalia is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 6 in August leads to these guidelines:
Deter overexposure. Protecting against the sun's effects is essential. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Vandalia in August?

Vandalia in August has an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 62.4°F (16.9°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in August is estimated at 80.6°F (27°C).

What is the least humid month in Vandalia?

With an average relative humidity of 42%, August is the least humid month in Vandalia, Montana.

What is the average humidity in August in Vandalia?

In August, the average relative humidity in Vandalia, Montana, is 42%.

How many days does it rain in August in Vandalia?

In August, in Vandalia, Montana, the rain falls for 10 days. Throughout August, 1.18" (30mm) of precipitation is accumulated.

When it does not snow in Vandalia?

In Vandalia, snow does not fall in June through September.

How many hours of daylight does Vandalia have in August?

In Vandalia, the average day length in August is 14h and 16min.

What time are sunrise and sunset in August in Vandalia?

In August, on the first day of the month, sunrise is at 5:43 am and sunset at 8:44 pm. On the last day of the month, in Vandalia, Montana, sunrise is at 6:24 am and sunset at 7:50 pm MDT.

How many hours of sunshine does Vandalia have in August?

In Vandalia, the average sunshine duration in August is 11.6h.

What is the UV index reading in August in Vandalia?

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

Average temperature in August - Vandalia, MT
  • Average high temperature in August: 81.7°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is February (23.7°F).

  • Average low temperature in August: 62.4°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (10.2°F).

Average pressure in August
Vandalia, MT

Average pressure in August - Vandalia, MT
  • Average pressure in August: 29.88"Hg

The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in August
Vandalia, MT

Average wind speed in August - Vandalia, MT
  • Average wind speed in August: 9.9mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is February (8.8mph).

Average humidity in August
Vandalia, MT

Average humidity in August - Vandalia, MT
  • Average humidity in August: 42%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (42%).

Average rainfall in August
Vandalia, MT

Average rainfall in August - Vandalia, MT
  • Average rainfall in August: 1.18"

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and February (0.35").

Average rainfall days in August
Vandalia, MT

Average rainfall days in August - Vandalia, MT
  • Average rainfall days in August: 10 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (2.3 days).

Average snowfall in August
Vandalia, MT

Average snowfall in August - Vandalia, MT
  • Average snowfall in August: 0"

The month with the highest snowfall is December (2.6").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Vandalia, MT

Average snowfall days in August - Vandalia, MT
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in August /
Average sunshine in August
Vandalia, MT

Average daylight in August / Average sunshine in August - Vandalia, MT
  • Average daylight in August: 14h and 2min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in August: 11h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in August
Vandalia, MT

Average sunshine days in August - Vandalia, MT
  • Average sunshine days in August: 18.3 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).

Average UV index in August
Vandalia, MT

Average UV index in August - Vandalia, MT
  • Average UV index in August: 6

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in August
Vandalia, MT

Average cloud cover in August - Vandalia, MT
  • Average cloud cover in August: 17

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 16).

Average visibility in August
Vandalia, MT

Average visibility in August - Vandalia, MT
  • 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).

Vandalia, Montana, USA

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