Monthly weather forecast and climate
Heart Butte, MT

January, the same as December, in Heart Butte, Montana, is another subzero cold winter month, with average temperature varying between 28.9°F (-1.7°C) and 16.2°F (-8.8°C). In Heart Butte, the average high-temperature is practically the same as in December - a still freezing cold 28.9°F (-1.7°C). Weather in January »

February, the last month of the winter, in Heart Butte, is also a subzero cold month, with average temperature ranging between max 28.8°F (-1.8°C) and min 15.6°F (-9.1°C). In Heart Butte, the average high-temperature in February is practically the same as in January - a still subzero cold 28.8°F (-1.8°C). Weather in February »

The first month of the spring, March, is a wintry month in Heart Butte, Montana, with temperature in the range of an average high of 39°F (3.9°C) and an average low of 24.8°F (-4°C). In Heart Butte, Montana, the average high-temperature rises, 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 chilly spring month in Heart Butte, Montana, with average temperature ranging between max 49.6°F (9.8°C) and min 34°F (1.1°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 »

The last month of the spring, May, is a mild month in Heart Butte, Montana, with average temperature ranging between min 42.4°F (5.8°C) and max 60.3°F (15.7°C). In Heart Butte, 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 »

The first month of the summer, June, is a pleasant month in Heart Butte, Montana, with average temperature fluctuating between 48.7°F (9.3°C) and 69.1°F (20.6°C). In June, the average high-temperature slightly increases, from a mild 60.3°F (15.7°C) in May, to a pleasant 69.1°F (20.6°C). Weather in June »

July in Heart Butte, Montana, is a moderately hot summer month, with average temperature ranging between max 78.8°F (26°C) and min 54.5°F (12.5°C). With an average high-temperature of 78.8°F (26°C) and an average low-temperature of 54.5°F (12.5°C), July is the warmest month. Weather in July »

August, the last month of the summer, in Heart Butte, is also a moderately hot month, with temperature in the range of an average high of 78.1°F (25.6°C) and an average low of 55.2°F (12.9°C). In Heart Butte, Montana, the average high-temperature in August is practically the same as in July - a still moderately hot 78.1°F (25.6°C). Weather in August »

The first month of the autumn, September, is still a comfortable month in Heart Butte, Montana, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 67.6°F (19.8°C). In Heart Butte, 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 Heart Butte, Montana, with average temperature varying between 51.4°F (10.8°C) and 36.1°F (2.3°C). In October, the average high-temperature plummets, 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 Heart Butte, is another cold month, with average temperature ranging between max 38.1°F (3.4°C) and min 24.4°F (-4.2°C). In November, the average high-temperature decreases, from a fresh 51.4°F (10.8°C) in October, to a cold 38.1°F (3.4°C). Weather in November »

December, the first month of the winter, in Heart Butte, is still a freezing cold month, with average temperature fluctuating between 15.3°F (-9.3°C) and 27.1°F (-2.7°C). With an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 15.3°F (-9.3°C), December is the coldest month. Weather in December »

What is the most humid month in Heart Butte?

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

How many days does it rain in Heart Butte?

In Heart Butte, during the entire year, the rain falls for 70.4 days and collects up to 8.46" (215mm) of precipitation.

When does it snow in Heart Butte?

Months with snowfall in Heart Butte, Montana, are January through May, September through December.

How much does it snow in Heart Butte?

In Heart Butte, 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 Heart Butte?

January and December, with an average of 5.6h of sunshine, are months with the least sunshine in Heart Butte, Montana.

What are the months with the lowest UV index in Heart Butte?

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

When does it snow the most in Heart Butte?

The month with the most snowfall 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 Heart Butte?

June is the month with the most rainfall in Heart Butte. Rain falls for 9.3 days and accumulates 1.77" (45mm) of precipitation.

When it does not snow in Heart Butte?

In Heart Butte, Montana, snow does not fall in June through August.

When are the longest days in Heart Butte?

With an average of 16h of daylight, June has the longest days of the year.

What is the warmest month in Heart Butte?

July is the warmest month in Heart Butte, 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 Heart Butte?

The month with the least rainfall in Heart Butte is July when the rain falls for 5.8 days and typically collects 0.31" (8mm) of precipitation.

What month has the most sunshine in Heart Butte?

The month with the most sunshine in Heart Butte is July, with an average of 12h of sunshine.

When is the highest UV index in Heart Butte?

The month with the highest UV index in Heart Butte, Montana, is July, with an average maximum UV index of 6.

What is the least humid month in Heart Butte?

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

What is the coldest month in Heart Butte?

With an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 15.3°F (-9.3°C), December is the coldest month in Heart Butte, Montana.

What is the month with the shortest days in Heart Butte?

The month with the shortest days in Heart Butte is December, with an average of 8.4h of daylight.
Average temperature - Heart Butte, MT
Average pressure - Heart Butte, MT

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.87").

Average wind speed - Heart Butte, MT

The windiest month (with the highest average wind speed) is January (11.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).

Average rainfall - Heart Butte, MT
Average rainfall days - Heart Butte, MT
Average snowfall - Heart Butte, MT
Average snowfall days - Heart Butte, 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 - Heart Butte, MT

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.4h).

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 - Heart Butte, MT

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 - Heart Butte, MT
Average visibility - Heart Butte, 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).