Monthly weather forecast and climate
Sun River, MT

January, the same as December, in Sun River, Montana, is another subzero cold winter month, with temperature in the range of an average low of 18.7°F (-7.4°C) and an average high of 31.3°F (-0.4°C). In Sun River, the average high-temperature is relatively the same as in December - a still subzero cold 31.3°F (-0.4°C). Weather in January »

The last month of the winter, February, is also a subzero cold month in Sun River, Montana, with average temperature ranging between max 31.3°F (-0.4°C) and min 17.6°F (-8°C). In February, the average high-temperature remains the same as in January - a still subzero cold 31.3°F (-0.4°C). Weather in February »

March, the first month of the spring, in Sun River, is a wintry month, with average temperature ranging between max 42.6°F (5.9°C) and min 27°F (-2.8°C). In March, the average high-temperature rises, from a freezing cold 31.3°F (-0.4°C) in February, to a wintry 42.6°F (5.9°C). Weather in March »

April in Sun River, Montana, is a fresh spring month, with average temperature ranging between max 51.4°F (10.8°C) and min 34.3°F (1.3°C). In Sun River, the average high-temperature marginally rises, from a cold 42.6°F (5.9°C) in March, to a cool 51.4°F (10.8°C). Weather in April »

May, the last month of the spring, in Sun River, is an enjoyable month, with average temperature ranging between min 41.9°F (5.5°C) and max 62.2°F (16.8°C). In Sun River, the average high-temperature increases, from a cool 51.4°F (10.8°C) in April, to an enjoyable 62.2°F (16.8°C). Weather in May »

The first month of the summer, June, is an agreeable month in Sun River, Montana, with average temperature fluctuating between 71.2°F (21.8°C) and 48.7°F (9.3°C). In Sun River, the average high-temperature in June rises, from an enjoyable 62.2°F (16.8°C) in May, to a pleasant 71.2°F (21.8°C). Weather in June »

July is a warm summer month in Sun River, Montana, with average temperature fluctuating between 55.6°F (13.1°C) and 82.2°F (27.9°C). July is the warmest month, with an average high-temperature of 82.2°F (27.9°C) and an average low-temperature of 55.6°F (13.1°C). In July, the average heat index is evaluated at 82.2°F (27.9°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in Sun River, Montana, with temperature in the range of an average low of 56.7°F (13.7°C) and an average high of 81.1°F (27.3°C). In August, the average high-temperature is relatively the same as in July - a still warm 81.1°F (27.3°C). Weather in August »

September, the first month of the autumn, in Sun River, is still a pleasant month, with temperature in the range of an average high of 70.5°F (21.4°C) and an average low of 49.5°F (9.7°C). In September, the average high-temperature drops, from a moderately hot 81.1°F (27.3°C) in August, to an agreeable 70.5°F (21.4°C). Weather in September »

October, the same as September, is another fresh autumn month in Sun River, Montana, with average temperature varying between 36.7°F (2.6°C) and 54.5°F (12.5°C). In Sun River, the average high-temperature significantly decreases, from an agreeable 70.5°F (21.4°C) in September, to a cool 54.5°F (12.5°C). Weather in October »

The last month of the autumn, November, is also a wintry month in Sun River, Montana, with average temperature fluctuating between 26.6°F (-3°C) and 40.1°F (4.5°C). In Sun River, the average high-temperature plummets, from a cool 54.5°F (12.5°C) in October, to a wintry 40.1°F (4.5°C). Weather in November »

December, the first month of the winter, in Sun River, is still a freezing cold month, with average temperature ranging between max 29.5°F (-1.4°C) and min 17.4°F (-8.1°C). The coldest month is December, with an average high-temperature of 29.5°F (-1.4°C) and an average low-temperature of 17.4°F (-8.1°C). Weather in December »

What is the most humid month in Sun River?

The most humid month in Sun River, Montana, is January, with an average relative humidity of 78%.

How many days does it rain in Sun River?

In Sun River, Montana, during the entire year, the rain falls for 112.8 days and collects up to 12.95" (329mm) of precipitation.

What is the driest month in Sun River?

Months with the least rainfall in Sun River are January and July Rain falls for 4.8 days and accumulates 0.63" (16mm) of rain.

When does it snow in Sun River?

Months with snowfall in Sun River are January through May, September through December.

How many days does it snow in Sun River?

Throughout the year, there are 69.4 snowfall days, and 35.35" (898mm) of snow is accumulated.

What is the month with the least sunshine in Sun River?

January and December, with an average of 5.4h of sunshine, are months with the least sunshine.

What is the month with the lowest UV index in Sun River?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

When does it snow the most in Sun River?

The month with the most snowfall in Sun River is February when snow falls for 14.4 days and typically aggregates up to 6.34" (161mm) of snow.

What is the rainiest month in Sun River?

June is the month with the most rainfall in Sun River, Montana. Rain falls for 13.8 days and accumulates 2.05" (52mm) of precipitation.

When it does not snow in Sun River?

In Sun River, Montana, snow does not fall in June through August.

When are the longest days in Sun River?

June has the longest days of the year in Sun River, Montana, with an average of 15.9h of daylight.

What is the warmest month in Sun River?

July is the warmest month, with an average high-temperature of 82.2°F (27.9°C) and an average low-temperature of 55.6°F (13.1°C).

What month has the most sunshine in Sun River?

July has the most sunshine of the year in Sun River, with an average of 11.9h of sunshine.

What is the month with the highest UV index in Sun River?

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

What is the least humid month in Sun River?

With an average relative humidity of 41%, August is the least humid month in Sun River.

What is the coldest month in Sun River?

The coldest month is December, with an average high-temperature of 29.5°F (-1.4°C) and an average low-temperature of 17.4°F (-8.1°C).

What is the month with the shortest days in Sun River?

December has the shortest days of the year in Sun River, Montana, with an average of 8.5h of daylight.
Average temperature - Sun River, MT
Average pressure - Sun River, MT

Months with the highest atmospheric pressure are January and December (30.14").
The month with the lowest atmospheric pressure is June (29.87").

Average wind speed - Sun River, MT

The windiest months (with the highest average wind speed) are January and November (10.7mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

Average rainfall - Sun River, MT

The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are January and July (0.63").

Average rainfall days - Sun River, MT
Average snowfall - Sun River, MT
Average snowfall days - Sun River, MT

The month with the highest number of snowfall days is February (14.4 days).
Months with the least snowfall days are July and August (0 days).

Average daylight / Average sunshine - Sun River, MT

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.5h).

The month with the most sunshine is July (Average sunshine: 11.9h).
Months with the least sunshine are January and December (Average sunshine: 5.4).

Average sunshine days - Sun River, MT

The month with the most sunshine days is September (18.8 days).
The month with the least sunshine days is April (10.3 days).

Average UV index - Sun River, MT
Average visibility - Sun River, MT

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).