Monthly weather forecast and climate
Sumatra, MT

January, the same as December, in Sumatra, Montana, is another subzero cold winter month, with average temperature ranging between max 30.9°F (-0.6°C) and min 17.4°F (-8.1°C). January and December, with an average high-temperature of 30.9°F (-0.6°C), are the coldest months. Weather in January »

The last month of the winter, February, is a wintry month in Sumatra, Montana, with average temperature ranging between max 32°F (0°C) and min 17.8°F (-7.9°C). In Sumatra, Montana, the average high-temperature is almost the same as in January - a wintry 32°F (0°C). Weather in February »

March, the first month of the spring, in Sumatra, is a chilly month, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 45.3°F (7.4°C). In Sumatra, the average high-temperature in March rises, from a wintry 32°F (0°C) in February, to a frosty 45.3°F (7.4°C). Weather in March »

April is a cool spring month in Sumatra, Montana, with temperature in the range of an average high of 55.2°F (12.9°C) and an average low of 37.6°F (3.1°C). In April, the average high-temperature increases, from a chilly 45.3°F (7.4°C) in March, to a cool 55.2°F (12.9°C). Weather in April »

May, the last month of the spring, in Sumatra, is a comfortable month, with average temperature ranging between min 46.2°F (7.9°C) and max 65.8°F (18.8°C). In May, the average high-temperature rises, from a cool 55.2°F (12.9°C) in April, to an enjoyable 65.8°F (18.8°C). Weather in May »

June, the first month of the summer, in Sumatra, is a moderately hot month, with temperature in the range of an average high of 77°F (25°C) and an average low of 55.6°F (13.1°C). In Sumatra, the average high-temperature in June increases, from an enjoyable 65.8°F (18.8°C) in May, to a moderately hot 77°F (25°C). Weather in June »

July is a tropical summer month in Sumatra, Montana, with average temperature varying between 86.5°F (30.3°C) and 64.2°F (17.9°C). July is the warmest month, with an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 64.2°F (17.9°C). In July, the average heat index is estimated at a tropical 86°F (30°C). Weather in July »

August, the last month of the summer, in Sumatra, is another warm month, with average temperature varying between 63.1°F (17.3°C) and 84.6°F (29.2°C). In Sumatra, the average high-temperature is essentially the same as in July - a warm 84.6°F (29.2°C). Weather in August »

The first month of the autumn, September, is still a warm month in Sumatra, Montana, with average temperature fluctuating between 74.5°F (23.6°C) and 54.9°F (12.7°C). In September, the average high-temperature decreases, from 84.6°F (29.2°C) in August, to a still moderately hot 74.5°F (23.6°C). Weather in September »

October, like September, is another mild autumn month in Sumatra, Montana, with temperature in the range of an average high of 57.2°F (14°C) and an average low of 41.4°F (5.2°C). In Sumatra, the average high-temperature significantly decreases, from a warm 74.5°F (23.6°C) in September, to a moderate 57.2°F (14°C). Weather in October »

The last month of the autumn, November, is also a frosty month in Sumatra, Montana, with temperature in the range of an average low of 29.1°F (-1.6°C) and an average high of 43.7°F (6.5°C). In November, the average high-temperature decreases, from a mild 57.2°F (14°C) in October, to a chilly 43.7°F (6.5°C). Weather in November »

The first month of the winter, December, is still a freezing cold month in Sumatra, Montana, with average temperature fluctuating between 30.9°F (-0.6°C) and 18.3°F (-7.6°C). The coldest months are January and December, with an average high-temperature of 30.9°F (-0.6°C). Weather in December »

What are the coldest months in Sumatra?

The coldest months in Sumatra are January and December, with an average high-temperature of 30.9°F (-0.6°C).

What is the most humid month in Sumatra?

The most humid month in Sumatra is January, with an average relative humidity of 79%.

How much does it rain in Sumatra?

In Sumatra, Montana, during the entire year, the rain falls for 99.5 days and collects up to 11.06" (281mm) of precipitation.

What is the driest month in Sumatra?

Months with the least rainfall in Sumatra are January, November and December Rain falls for 4.2 days and accumulates 0.47" (12mm) of rain.

When does it snow in Sumatra?

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

How much does it snow in Sumatra?

Throughout the year, in Sumatra, there are 47 snowfall days, and 15.83" (402mm) of snow is accumulated.

When does it snow the most in Sumatra?

February is the month with the most snowfall. Snow falls for 10.3 days and accumulates 3.74" (95mm) of snow.

What is the month with the least sunshine in Sumatra?

February and December, with an average of 5.3h of sunshine, are months with the least sunshine in Sumatra, Montana.

What is the wettest month in Sumatra?

May is the month with the most rainfall in Sumatra. Rain falls for 13.7 days and accumulates 1.81" (46mm) of precipitation.

When it does not snow in Sumatra?

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

When are the longest days in Sumatra?

The month with the longest days in Sumatra, Montana, is June, with an average of 15.8h of daylight.

What is the warmest month in Sumatra?

The warmest month in Sumatra is July, with an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 64.2°F (17.9°C).

What month has the most sunshine in Sumatra?

With an average of 11.8h of sunshine, July has the most sunshine of the year in Sumatra, Montana.

What is the month with the highest UV index in Sumatra?

The month with the highest UV index is July, with an average maximum UV index of 7.

What is the least humid month in Sumatra?

August is the least humid month in Sumatra, Montana, with an average relative humidity of 38%.

What is the month with the shortest days in Sumatra?

December has the shortest days of the year in Sumatra, with an average of 8.6h of daylight.

When is the lowest UV index in Sumatra?

With an average maximum UV index of 1, December is the month with the lowest UV index.
Average temperature - Sumatra, MT
Average pressure - Sumatra, MT

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.84").

Average wind speed - Sumatra, MT

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is July (8.2mph).

Average rainfall - Sumatra, MT

The wettest month (with the highest rainfall) is May (1.81").
The driest months (with the least rainfall) are January, November and December (0.47").

Average rainfall days - Sumatra, MT

The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (3.8 days).

Average snowfall - Sumatra, MT
Average snowfall days - Sumatra, MT

The month with the highest number of snowfall days is February (10.3 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine - Sumatra, MT

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

The month with the most sunshine is July (Average sunshine: 11.8h).
Months with the least sunshine are February and December (Average sunshine: 5.3).

Average sunshine days - Sumatra, MT

The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is April (14.2 days).

Average visibility - Sumatra, 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).