Sweet Grass
Montana, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Sweet Grass, MT

January, like December, is a freezing cold winter month in Sweet Grass, Montana, with temperature in the range of an average high of 28.9°F (-1.7°C) and an average low of 16.2°F (-8.8°C). In Sweet Grass, the average high-temperature in January is relatively the same as in December - a still freezing cold 28.9°F (-1.7°C). Weather in January »

The last month of the winter, February, is another freezing cold month in Sweet Grass, Montana, with average temperature ranging between min 15.6°F (-9.1°C) and max 28.8°F (-1.8°C). In February, the average high-temperature is almost the same as in January - a still subzero cold 28.8°F (-1.8°C). Weather in February »

March, the first month of the spring, in Sweet Grass, is a wintry month, with average temperature fluctuating between 24.8°F (-4°C) and 39°F (3.9°C). In Sweet Grass, the average high-temperature in March increases, from a subzero cold 28.8°F (-1.8°C) in February, to a wintry 39°F (3.9°C). Weather in March »

April is a frosty spring month in Sweet Grass, Montana, with average temperature fluctuating between 34°F (1.1°C) and 49.6°F (9.8°C). In April, the average high-temperature increases, from a cold 39°F (3.9°C) in March, to a chilly 49.6°F (9.8°C). Weather in April »

May, the last month of the spring, in Sweet Grass, is a moderate month, with average temperature fluctuating between 60.3°F (15.7°C) and 42.4°F (5.8°C). In Sweet Grass, the average high-temperature rises, from a frosty 49.6°F (9.8°C) in April, to a mild 60.3°F (15.7°C). Weather in May »

June, the first month of the summer, in Sweet Grass, is an agreeable month, with average temperature varying between 48.7°F (9.3°C) and 69.1°F (20.6°C). In Sweet Grass, the average high-temperature in June marginally rises, from a mild 60.3°F (15.7°C) in May, to an agreeable 69.1°F (20.6°C). Weather in June »

July is a warm summer month in Sweet Grass, Montana, with average temperature varying between 78.8°F (26°C) and 54.5°F (12.5°C). July is the warmest month, with an average high-temperature of 78.8°F (26°C) and an average low-temperature of 54.5°F (12.5°C). Weather in July »

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). In August, the average high-temperature is practically the same as in July - a still warm 78.1°F (25.6°C). Weather in August »

The first month of the autumn, September, is still a comfortable month in Sweet Grass, Montana, with average temperature varying between 48.4°F (9.1°C) and 67.6°F (19.8°C). In September, the average high-temperature drops, from a moderately hot 78.1°F (25.6°C) in August, to a comfortable 67.6°F (19.8°C). Weather in September »

October, the same as September, is another fresh autumn month in Sweet Grass, Montana, with average temperature fluctuating between 51.4°F (10.8°C) and 36.1°F (2.3°C). In October, the average high-temperature significantly decreases, from a comfortable 67.6°F (19.8°C) in September, to a fresh 51.4°F (10.8°C). Weather in October »

November, the last month of the autumn, in Sweet Grass, is also a wintry month, with temperature in the range of an average low of 24.4°F (-4.2°C) and an average high of 38.1°F (3.4°C). In Sweet Grass, the average high-temperature in November drops, from a fresh 51.4°F (10.8°C) in October, to a cold 38.1°F (3.4°C). Weather in November »

The first month of the winter, December, is also a subzero cold month in Sweet Grass, Montana, with average temperature fluctuating between 27.1°F (-2.7°C) and 15.3°F (-9.3°C). The coldest month is December, with an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 15.3°F (-9.3°C). Weather in December »

What is the most humid month in Sweet Grass?

January is the most humid month, with an average relative humidity of 79%.

How many days does it rain in Sweet Grass?

Throughout the year, there are 70.4 rainfall days, and 8.46" (215mm) of precipitation is accumulated.

When does it snow in Sweet Grass?

January through May, September through December are months with snowfall in Sweet Grass, Montana.

How much does it snow in Sweet Grass?

In Sweet Grass, during the entire year, snow falls for 54.3 days, and aggregates up to 19.49" (495mm) of snow.

What is the month with the least sunshine in Sweet Grass?

Months with the least sunshine are January and December, with an average of 5.6h of sunshine.

When is the lowest UV index in Sweet Grass?

Months with the lowest UV index in Sweet Grass, Montana, are January through March, October through December, with an average maximum UV index of 2.

What is the snowiest month in Sweet Grass?

The month with the most snowfall in Sweet Grass, Montana, is February when snow falls for 9.7 days and typically aggregates up to 3.58" (91mm) of snow.

What is the rainiest month in Sweet Grass?

The month with the most rainfall in Sweet Grass is June when the rain falls for 9.3 days and typically aggregates up to 1.77" (45mm) of precipitation.

When it does not snow in Sweet Grass?

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

When are the longest days in Sweet Grass?

June has the longest days of the year in Sweet Grass, Montana, with an average of 16.1h of daylight.

What is the warmest month in Sweet Grass?

July is the warmest month in Sweet Grass, Montana, with an average high-temperature of 78.8°F (26°C) and an average low-temperature of 54.5°F (12.5°C).

What is the driest month in Sweet Grass?

July is the month with the least rainfall in Sweet Grass. Rain falls for 5.8 days and accumulates 0.31" (8mm) of precipitation.

What month has the most sunshine in Sweet Grass?

The month with the most sunshine in Sweet Grass, Montana, is July, with an average of 12h of sunshine.

What is the month with the highest UV index in Sweet Grass?

The month with the highest UV index in Sweet Grass is July, with an average maximum UV index of 6.

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, Montana.

What is the coldest month in Sweet Grass?

December is the coldest month in Sweet Grass, with an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 15.3°F (-9.3°C).

What is the month with the shortest days in Sweet Grass?

With an average of 8.3h of daylight, December has the shortest days of the year.
Average temperature - Sweet Grass, MT
Average rainfall - Sweet Grass, MT
Average rainfall days - Sweet Grass, MT
Average snowfall - Sweet Grass, MT
Average snowfall days - Sweet Grass, MT

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 / Average sunshine - Sweet Grass, MT

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

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 UV index - Sweet Grass, MT