August weather forecast and climate
Sweet Grass, MT

August, the last month of the summer, in Sweet Grass, is also a moderately hot month, with average temperature ranging between max 78.1°F (25.6°C) and min 55.2°F (12.9°C).

Temperature

In August, the average high-temperature is practically the same as in July - a still warm 78.1°F (25.6°C). The average low-temperature, in Sweet Grass, is 55.2°F (12.9°C).

Humidity

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

Rainfall

In Sweet Grass, Montana, it is raining for 5.8 days, with typically 0.47" (12mm) of accumulated precipitation. In Sweet Grass, Montana, during the entire year, the rain falls for 70.4 days and collects up to 8.46" (215mm) of precipitation.

Snowfall

In Sweet Grass snow does not fall in June through August.

Daylight

In August, the average length of the day in Sweet Grass is 14.3h.

Sunshine

In August, the average sunshine is 11.4h.

UV index

The average daily maximum UV index in Sweet Grass is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 in August transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in August in Sweet Grass?

The average high-temperature, in August, in Sweet Grass, Montana, is 78.1°F (25.6°C), while the average low-temperature is 55.2°F (12.9°C).

What is the least humid month in Sweet Grass?

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

What is the average humidity in August in Sweet Grass?

The average relative humidity in August is 43%.

How many days does it rain in August in Sweet Grass?

In August, in Sweet Grass, the rain falls for 5.8 days. Throughout August, 0.47" (12mm) of precipitation is accumulated.

Does it snow in Sweet Grass in August?

In Sweet Grass, Montana, in August, it doesn't snow. In September, it regularly snows.

When it does not snow in Sweet Grass?

June through August are months without snowfall in Sweet Grass, Montana.

How many hours of daylight does Sweet Grass have in August?

In August, the average length of the day in Sweet Grass is 14.3h.

How many hours of sunshine does Sweet Grass have in August?

The average sunshine in August in Sweet Grass is 11.4h.

What is the UV index intensity in August in Sweet Grass?

In August, the average daily maximum UV index in Sweet Grass is 5. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
Average temperature in August - Sweet Grass, MT
  • Average high temperature in August: 25.6°C

The warmest month (with the highest average high temperature) is July (26°C).
The month with the lowest average high temperature is December (-2.7°C).

  • Average low temperature in August: 12.9°C

The month with the highest average low temperature is August (12.9°C).
The coldest month (with the lowest average low temperature) is December (-9.3°C).

Average pressure in August - Sweet Grass, MT
  • Average pressure in August: 1013mbar

The month with the highest atmospheric pressure is January (1020.3mbar).
The month with the lowest atmospheric pressure is June (1011.5mbar).

Average wind speed in August - Sweet Grass, MT
  • Average wind speed in August: 14.1km/h

The windiest month (with the highest average wind speed) is January (19km/h).
The calmest month (with the lowest average wind speed) is August (14.1km/h).

Average humidity in August - Sweet Grass, MT
  • Average humidity in August: 43%

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (43%).

Average rainfall in August - Sweet Grass, MT
  • Average rainfall in August: 12mm

The wettest month (with the highest rainfall) is June (45mm).
The driest month (with the least rainfall) is July (8mm).

Average rainfall days in August - Sweet Grass, MT
  • Average rainfall days in August: 5.8 days

The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is November (2.6 days).

Average snowfall in August - Sweet Grass, MT
  • Average snowfall in August: 0mm

The month with the highest snowfall is February (91mm).
Months with the least snowfall are June, July and August (0mm).

Average snowfall days in August - Sweet Grass, MT
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (10.2 days).
Months with the least snowfall days are July and August (0 days).

Average daylight in August / Average sunshine in August - Sweet Grass, MT
  • Average daylight in August: 14.3h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in August: 11.4h

The month with the most sunshine is July (Average sunshine: 12h).
Months with the least sunshine are January and December (Average sunshine: 5.6).

Average sunshine days in August - Sweet Grass, MT
  • Average sunshine days in August: 23.3 days

The month with the most sunshine days is July (23.5 days).
The month with the least sunshine days is April (17.4 days).

Average UV index in August - Sweet Grass, MT
  • Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in August - Sweet Grass, MT
  • Average cloud cover in August: 16

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 15).

Average visibility in August - Sweet Grass, MT
  • Average visibility in August: 10km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, November and December (9km).