Roundup
Montana, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Roundup, MT

January, the same as December, is another cold winter month in Roundup, Montana, with average temperature varying between 15.4°F (-9.2°C) and 39°F (3.9°C). In Roundup, the average high-temperature is almost the same as in December - a still wintry 39°F (3.9°C). Weather in January »
February, the last month of the winter, in Roundup, is a chilly month, with average temperature ranging between min 18°F (-7.8°C) and max 43.2°F (6.2°C). In Roundup, the average high-temperature is practically the same as in January - a frosty 43.2°F (6.2°C). Weather in February »

March, the first month of the spring, in Roundup, is a cool month, with average temperature varying between 24.6°F (-4.1°C) and 51.8°F (11°C). In Roundup, the average high-temperature in March marginally rises, from a frosty 43.2°F (6.2°C) in February, to a fresh 51.8°F (11°C). Weather in March »

April in Roundup, Montana, is a comfortable spring month, with average temperature varying between 61.3°F (16.3°C) and 32.4°F (0.2°C). In April, the average high-temperature increases, from a fresh 51.8°F (11°C) in March, to an enjoyable 61.3°F (16.3°C). Weather in April »

May, the last month of the spring, in Roundup, is an agreeable month, with average temperature ranging between max 70.5°F (21.4°C) and min 41.5°F (5.3°C). In Roundup, the average high-temperature increases, from an enjoyable 61.3°F (16.3°C) in April, to an agreeable 70.5°F (21.4°C). Weather in May »

June, the first month of the summer, in Roundup, is a warm month, with average temperature ranging between min 49.8°F (9.9°C) and max 79.2°F (26.2°C). In June, the average high-temperature slightly increases, from a pleasant 70.5°F (21.4°C) in May, to a moderately hot 79.2°F (26.2°C). Weather in June »

July in Roundup, Montana, is a tropical summer month, with average temperature varying between 55.6°F (13.1°C) and 88.9°F (31.6°C). The warmest month is July, with an average high-temperature of 88.9°F (31.6°C) and an average low-temperature of 55.6°F (13.1°C). Weather in July »

August, the last month of the summer, in Roundup, is another hot month, with average temperature varying between 88.2°F (31.2°C) and 53.4°F (11.9°C). In August, the average high-temperature is essentially the same as in July - a still tropical 88.2°F (31.2°C). Weather in August »

The first month of the autumn, September, is still a warm month in Roundup, Montana, with average temperature varying between 76.5°F (24.7°C) and 43.7°F (6.5°C). In Roundup, the average high-temperature decreases, from a tropical 88.2°F (31.2°C) in August, to a moderately hot 76.5°F (24.7°C). Weather in September »

October, like September, in Roundup, Montana, is another enjoyable autumn month, with average temperature ranging between min 34°F (1.1°C) and max 62.4°F (16.9°C). In Roundup, the average high-temperature in October decreases, from a moderately hot 76.5°F (24.7°C) in September, to an enjoyable 62.4°F (16.9°C). Weather in October »

November, the last month of the autumn, in Roundup, is another chilly month, with temperature in the range of an average high of 47.3°F (8.5°C) and an average low of 23.9°F (-4.5°C). In Roundup, Montana, the average high-temperature significantly decreases, from a comfortable 62.4°F (16.9°C) in October, to a frosty 47.3°F (8.5°C). Weather in November »

The first month of the winter, December, is also a wintry month in Roundup, Montana, with average temperature fluctuating between 37.8°F (3.2°C) and 15.3°F (-9.3°C). With an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 15.3°F (-9.3°C), December is the coldest month. Weather in December »

How much does it rain in Roundup?

During the entire year, Roundup aggregates up to 13.5" (343.1mm) of precipitation.

What is the driest month in Roundup?

Months with the least rainfall in Roundup are January and February with 0.3" (8.6mm) of accumulated rain.

When does it snow in Roundup?

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

How much does it snow in Roundup?

Throughout the year, 22.3" (566.4mm) of snow is accumulated.

When does it snow the most in Roundup?

Months with the most snowfall are January and December, with an average 5.3" (134.6mm) of accumulated snow.

What is the rainiest month in Roundup?

June is the month with the most rainfall in Roundup, Montana, with 2.6" (66.8mm) of accumulated precipitation.

When are the longest days in Roundup?

June has the longest days of the year, with an average of 15.8h of daylight.

What is the warmest month in Roundup?

With an average high-temperature of 88.9°F (31.6°C) and an average low-temperature of 55.6°F (13.1°C), July is the warmest month in Roundup.

What is the coldest month in Roundup?

The coldest month in Roundup is December, with an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 15.3°F (-9.3°C).

What is the month with the shortest days in Roundup?

With an average of 8.7h of daylight, December has the shortest days of the year.
Average temperature - Roundup, MT
Average rainfall - Roundup, MT
Average snowfall - Roundup, MT
Average daylight - Roundup, MT

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.7h).