Monthly weather forecast and climate
Halfmoon, MT

January, the same as December, in Halfmoon, Montana, is a freezing cold winter month, with average temperature fluctuating between 27.1°F (-2.7°C) and 14.4°F (-9.8°C). In January, the average high-temperature is almost the same as in December - a still freezing cold 27.1°F (-2.7°C). Weather in January »

February, the last month of the winter, in Halfmoon, is another freezing cold month, with average temperature ranging between min 13.5°F (-10.3°C) and max 28.2°F (-2.1°C). In February, the average high-temperature is relatively the same as in January - a still freezing cold 28.2°F (-2.1°C). Weather in February »

March, the first month of the spring, in Halfmoon, is a wintry month, with average temperature fluctuating between 36.1°F (2.3°C) and 21.6°F (-5.8°C). In Halfmoon, the average high-temperature in March marginally rises, from a freezing cold 28.2°F (-2.1°C) in February, to a wintry 36.1°F (2.3°C). Weather in March »

April in Halfmoon, Montana, is a frosty spring month, with average temperature ranging between min 28°F (-2.2°C) and max 46.6°F (8.1°C). In Halfmoon, the average high-temperature in April increases, from a wintry 36.1°F (2.3°C) in March, to a frosty 46.6°F (8.1°C). Weather in April »

May, the last month of the spring, in Halfmoon, is a moderate month, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 59.5°F (15.3°C). In May, the average high-temperature rises, from a chilly 46.6°F (8.1°C) in April, to a mild 59.5°F (15.3°C). Weather in May »

June, the first month of the summer, in Halfmoon, is an enjoyable month, with average temperature ranging between max 66.4°F (19.1°C) and min 41.2°F (5.1°C). In Halfmoon, the average high-temperature marginally rises, from a mild 59.5°F (15.3°C) in May, to an enjoyable 66.4°F (19.1°C). Weather in June »

July is a warm summer month in Halfmoon, Montana, with average temperature varying between 77.9°F (25.5°C) and 45.1°F (7.3°C). July is the warmest month, with an average high-temperature of 77.9°F (25.5°C) and an average low-temperature of 45.1°F (7.3°C). Weather in July »

August, the last month of the summer, in Halfmoon, is also a moderately hot month, with average temperature fluctuating between 45.5°F (7.5°C) and 76.8°F (24.9°C). In Halfmoon, the average high-temperature is essentially the same as in July - a still moderately hot 76.8°F (24.9°C). Weather in August »

September, the first month of the autumn, in Halfmoon, is also an enjoyable month, with average temperature varying between 39.2°F (4°C) and 65.5°F (18.6°C). In Halfmoon, the average high-temperature decreases, from a moderately hot 76.8°F (24.9°C) in August, to an enjoyable 65.5°F (18.6°C). Weather in September »

October, the same as September, in Halfmoon, Montana, is another chilly autumn month, with average temperature ranging between max 48.4°F (9.1°C) and min 30.7°F (-0.7°C). In Halfmoon, Montana, the average high-temperature in October significantly decreases, from a comfortable 65.5°F (18.6°C) in September, to a chilly 48.4°F (9.1°C). Weather in October »

The last month of the autumn, November, is also a wintry month in Halfmoon, Montana, with average temperature ranging between max 34.5°F (1.4°C) and min 23°F (-5°C). In Halfmoon, the average high-temperature drops, from a frosty 48.4°F (9.1°C) in October, to a cold 34.5°F (1.4°C). Weather in November »

The first month of the winter, December, is still a freezing cold month in Halfmoon, Montana, with average temperature varying between 13.8°F (-10.1°C) and 25.7°F (-3.5°C). The coldest month is December, with an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 13.8°F (-10.1°C). Weather in December »

What is the most humid month in Halfmoon?

With an average relative humidity of 93%, January is the most humid month.

How many days does it rain in Halfmoon?

Throughout the year, in Halfmoon, there are 126.4 rainfall days, and 11.22" (285mm) of precipitation is accumulated.

When does it snow in Halfmoon?

Months with snowfall are January through May, September through December.

How much does it snow in Halfmoon?

In Halfmoon, during the entire year, snow falls for 97 days, and aggregates up to 33.86" (860mm) of snow.

What is the snowiest month in Halfmoon?

The month with the most snowfall in Halfmoon, Montana, is January when snow falls for 18.9 days and typically aggregates up to 7.72" (196mm) of snow.

What is the month with the least sunshine in Halfmoon?

January has the least sunshine of the year, with an average of 3.5h of sunshine.

What is the month with the lowest UV index in Halfmoon?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Halfmoon, Montana.

What is the wettest month in Halfmoon?

June is the month with the most rainfall in Halfmoon, Montana. Rain falls for 13.7 days and accumulates 1.42" (36mm) of precipitation.

When it does not snow in Halfmoon?

June through August are months without snowfall in Halfmoon, Montana.

When are the longest days in Halfmoon?

The month with the longest days in Halfmoon is June, with an average of 16h of daylight.

What is the warmest month in Halfmoon?

The warmest month is July, with an average high-temperature of 77.9°F (25.5°C) and an average low-temperature of 45.1°F (7.3°C).

What month has the most sunshine in Halfmoon?

July has the most sunshine of the year in Halfmoon, Montana, with an average of 11.9h of sunshine.

When is the highest UV index in Halfmoon?

July is the month with the highest UV index, with an average maximum UV index of 6.

What is the least humid month in Halfmoon?

The least humid month in Halfmoon, Montana, is August, with an average relative humidity of 55%.

What is the driest month in Halfmoon?

August is the month with the least rainfall in Halfmoon. Rain falls for 6.3 days and accumulates 0.43" (11mm) of precipitation.

What is the coldest month in Halfmoon?

With an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 13.8°F (-10.1°C), December is the coldest month.

What is the month with the shortest days in Halfmoon?

With an average of 8.4h of daylight, December has the shortest days of the year.
Average temperature - Halfmoon, MT
Average pressure - Halfmoon, MT

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.91").

Average wind speed - Halfmoon, MT

The windiest month (with the highest average wind speed) is April (4.6mph).
The calmest months (with the lowest average wind speed) are August and December (3.7mph).

Average rainfall - Halfmoon, MT
Average rainfall days - Halfmoon, MT

The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is August (6.3 days).

Average snowfall - Halfmoon, MT
Average snowfall days - Halfmoon, MT

The month with the highest number of snowfall days is December (19.1 days).
Months with the least snowfall days are July and August (0 days).

Average daylight / Average sunshine - Halfmoon, 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: 11.9h).
The month with the least sunshine is January (Average sunshine: 3.5h).

Average sunshine days - Halfmoon, MT
Average visibility - Halfmoon, MT