August weather forecast
Circle, MT

Share

Weather in August

The last month of the summer, August, is also a moderately hot month in Circle, Montana, with an average temperature varying between 63.1°F (17.3°C) and 83.3°F (28.5°C).

Temperature

August's climate shows a minor adjustment in average high-temperatures to a still moderately hot 83.3°F (28.5°C) from July's 84.7°F (29.3°C). During the month of August, Circle's nighttime temperature lowers to an average of 63.1°F (17.3°C).

Heat index

In August, the average heat index is computed to be 82.4°F (28°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
Realize that the values for the heat index are set for shaded places and light winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.

Humidity

With an average relative humidity of 43%, August is the least humid month.

Rainfall

In August, the rain falls for 10.6 days. Throughout August, 1.22" (31mm) of precipitation is accumulated. In Circle, during the entire year, the rain falls for 102.6 days and collects up to 13.35" (339mm) of precipitation.

Snowfall

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

Daylight

In Circle, the average length of the day in August is 14h and 11min.
On the first day of August, sunrise is at 5:41 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:43 pm MDT.

Sunshine

In August, the average sunshine is 11.6h.

UV index

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 6 during August leads to these advisories:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in Circle in August?

The high-temperature in Circle during August is 83.3°F (28.5°C) and the low-temperature is 63.1°F (17.3°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 82.4°F (28°C).

What is the least humid month in Circle?

August is the least humid month, with an average relative humidity of 43%.

What is the average humidity in August in Circle?

In August, the average relative humidity in Circle, Montana, is 43%.

How much does it rain in Circle in August?

In Circle, during August, the rain falls for 10.6 days and regularly aggregates up to 1.22" (31mm) of precipitation.

When it does not snow in Circle?

June through September are months without snowfall in Circle, Montana.

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

The average day length in August is 14h and 11min.

When is the sunrise / sunset in August in Circle?

In August, on the first day of the month, sunrise is at 5:41 am and sunset at 8:35 pm. On the last day of the month, in Circle, Montana, sunrise is at 6:21 am and sunset at 7:43 pm MDT.

How long on average sun shines in August in Circle?

The average sunshine duration in August in Circle, Montana, is 11.6h.

What is the UV index reading in August in Circle?

The average daily maximum UV index in August in Circle, Montana, is 6. A UV Index value of 6 to 7 symbolizes a high health risk 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
Circle, MT

Average temperature in August - Circle, MT
  • Average high temperature in August: 83.3°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.5°F).

  • Average low temperature in August: 63.1°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

Average pressure in August
Circle, MT

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

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in August
Circle, MT

Average wind speed in August - Circle, MT
  • Average wind speed in August: 9.3mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).

Average humidity in August
Circle, MT

Average humidity in August - Circle, MT
  • Average humidity in August: 43%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (43%).

Average rainfall in August
Circle, MT

Average rainfall in August - Circle, MT
  • Average rainfall in August: 1.22"

The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is January (0.51").

Average rainfall days in August
Circle, MT

Average rainfall days in August - Circle, MT
  • Average rainfall days in August: 10.6 days

The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (4 days).

Average snowfall in August
Circle, MT

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

The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Circle, MT

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

The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are July, August and September (0 days).

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

Average daylight in August / Average sunshine in August - Circle, MT
  • Average daylight in August: 14h and 1min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in August: 11h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

Average sunshine days in August
Circle, MT

Average sunshine days in August - Circle, MT
  • Average sunshine days in August: 17.6 days

The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is June (13.1 days).

Average UV index in August
Circle, MT

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

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

Average cloud cover in August
Circle, MT

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

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 17).

Average visibility in August
Circle, MT

Average visibility in August - Circle, 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).

Circle, Montana, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location