August weather forecast
Forsyth, MT

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Weather in August

August, the last month of the summer in Forsyth, is another warm month, with an average temperature fluctuating between 64.4°F (18°C) and 84.4°F (29.1°C).

Temperature

August commences with an average high-temperature of a moderately hot 84.4°F (29.1°C), showing little deviation from July's 86.5°F (30.3°C). August brings Forsyth a consistent average low-temperature of 64.4°F (18°C).

Humidity

With an average relative humidity of 38%, August is the least humid month.

Rainfall

In August, the rain falls for 10.4 days. Throughout August, 1.14" (29mm) of precipitation is accumulated. In Forsyth, during the entire year, the rain falls for 121.7 days and collects up to 13.23" (336mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In August, the average length of the day is 14h and 7min.
On the first day of August, sunrise is at 5:49 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:46 pm MDT.

Sunshine

In August, the average sunshine is 11.7h.

UV index

The average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In August, a regular UV index of 6 translates into these guidelines:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Updated: Jul 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in August?

The average high-temperature, in August, in Forsyth, is 84.4°F (29.1°C), while the average low-temperature is 64.4°F (18°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is calculated to be 86°F (30°C).

What is the least humid month?

With an average relative humidity of 38%, August is the least humid month.

What is the average humidity in August?

In August, the average relative humidity is 38%.

How much does it rain in August?

In Forsyth, during August, the rain falls for 10.4 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When it does not snow?

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

How many hours of daylight does Forsyth have in August?

In Forsyth, the average day length in August is 14h and 7min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 5:49 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:46 pm MDT.

How many hours of sunshine does Forsyth have in August?

The average sunshine duration in August is 11.7h.

What is the UV index intensity in August?

The average daily maximum UV index in August in Forsyth is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability 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
Forsyth, MT

Average temperature in August - Forsyth, MT
  • Average high temperature in August: 84.4°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in August: 64.4°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

Average pressure in August
Forsyth, MT

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

The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in August
Forsyth, MT

Average wind speed in August - Forsyth, MT
  • Average wind speed in August: 8.9mph

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).

Average humidity in August
Forsyth, MT

Average humidity in August - Forsyth, MT
  • Average humidity in August: 38%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (38%).

Average rainfall in August
Forsyth, MT

Average rainfall in August - Forsyth, MT
  • Average rainfall in August: 1.14"

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is November (0.63").

Average rainfall days in August
Forsyth, MT

Average rainfall days in August - Forsyth, MT
  • Average rainfall days in August: 10.4 days

The month with the highest number of rainy days is May (15.1 days).
The months with the least rainy days are January, February and December (6.5 days).

Average snowfall in August
Forsyth, MT

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

The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Forsyth, MT

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

The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • 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: 5h and 12min).

Average sunshine days in August
Forsyth, MT

Average sunshine days in August - Forsyth, MT
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.9 days).

Average UV index in August
Forsyth, MT

Average UV index in August - Forsyth, 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
Forsyth, MT

Average cloud cover in August - Forsyth, MT
  • Average cloud cover in August: 15

The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 15).

Average visibility in August
Forsyth, MT

Average visibility in August - Forsyth, 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).

Forsyth, Montana, USA

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