Climate and monthly weather forecast
Sumatra, MT

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Weather in January

January, like December, is another subzero cold winter month in Sumatra, Montana, with an average temperature varying between 17.4°F (-8.1°C) and 30.9°F (-0.6°C). During January and December, Sumatra experiences its lowest temperatures, averaging a high-temperature of 30.9°F (-0.6°C). Weather in January »

Weather in February

February, the last month of the winter in Sumatra, is a wintry month, with an average temperature fluctuating between 32°F (0°C) and 17.8°F (-7.9°C). Sumatra, Montana, observes an average high-temperature of a wintry 32°F (0°C) in February, barely different from 30.9°F (-0.6°C) in January. Weather in February »

Weather in March

March, the first month of the spring in Sumatra, is a frosty 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). March marks a rise in the average high-temperature, moving from February's icy 32°F (0°C) to a frosty 45.3°F (7.4°C). Weather in March »

Weather in April

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

Weather in May

May, the last month of the spring in Sumatra, is a refreshing month, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 46.2°F (7.9°C). As May sets, the average high-temperature shows an increase, moving up from a fresh 55.2°F (12.9°C) in April to a comfortable 65.8°F (18.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Sumatra, Montana, 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). The arrival of June brings a change in Sumatra's weather, with average high-temperatures moving from May's refreshing 65.8°F (18.8°C) to a moderately hot 77°F (25°C). Weather in June »

Weather in July

July is a hot summer month in Sumatra, Montana, with an average temperature varying between 86.5°F (30.3°C) and 64.2°F (17.9°C). Sumatra's warmest weather arrives in July, when temperatures average a high of 86.5°F (30.3°C) and a low of 64.2°F (17.9°C). The heat index value during July is estimated at a hot 86°F (30°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Sumatra, Montana, with an average temperature fluctuating between 84.6°F (29.2°C) and 63.1°F (17.3°C). Sumatra, Montana, registers an average high-temperature of a moderately hot 84.6°F (29.2°C) with the arrival of August, showing minor deviation from the preceding month. Weather in August »

Weather in September

September, the first month of the autumn in Sumatra, is also a moderately hot month, with an average temperature fluctuating between 54.9°F (12.7°C) and 74.5°F (23.6°C). A shift in Sumatra's weather is observed as August turns into September, with the average high temperature reducing from 84.6°F (29.2°C) to a still warm 74.5°F (23.6°C). Weather in September »

Weather in October

October, the same as September, in Sumatra, Montana, is a moderate autumn month, with an average temperature fluctuating between 57.2°F (14°C) and 41.4°F (5.2°C). October is characterized by a clear drop in the average high-temperature, falling from September's moderately hot 74.5°F (23.6°C) to a mild 57.2°F (14°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Sumatra, Montana, with an average temperature fluctuating between 43.7°F (6.5°C) and 29.1°F (-1.6°C). November ushers in a slight temperature change, with average high-temperatures reducing from October's refreshing 57.2°F (14°C) to a chilly 43.7°F (6.5°C). Weather in November »

Weather in December

December, the first month of the winter in Sumatra, is still a freezing cold month, with an average temperature fluctuating between 18.3°F (-7.6°C) and 30.9°F (-0.6°C). The coldest months are January and December, with an average high-temperature of 30.9°F (-0.6°C). Weather in December »
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Sumatra?

The temperature hits its lowest levels in January and December, recording an average high-temperature of 30.9°F (-0.6°C).

What is the most humid month in Sumatra?

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

What is the driest month in Sumatra?

The 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.

How much does it rain in Sumatra?

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

When does it snow in Sumatra?

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

How many days does it snow in Sumatra?

In Sumatra, during the entire year, snow falls for 47 days and aggregates up to 15.83" (402mm) of snow.

When does it snow the most in Sumatra?

February is the month with the most snowfall in Sumatra, Montana. 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.

When is Daylight Saving Time (DST) in Sumatra?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

What is the wettest month in Sumatra?

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

When it does not snow in Sumatra?

In Sumatra, 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 15h and 48min of daylight.

What is the hottest time of year in Sumatra?

In Sumatra, the peak temperatures are generally noted in July, averaging a high of 86.5°F (30.3°C) and a low of 64.2°F (17.9°C).

What month has the most sunshine in Sumatra?

The month with the most sunshine is July, with an average of 11.8h of sunshine.

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

With an average maximum UV index of 7, July is the month with the highest UV index in Sumatra.

What is the least humid month in Sumatra?

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

What is the month with the shortest days in Sumatra?

The month with the shortest days in Sumatra is December, with an average of 8h and 36min 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 in Sumatra, Montana.

Average temperature
Sumatra, MT

Average temperature - Sumatra, MT

The warmest month (with the highest average high temperature) is July (86.5°F).
The months with the lowest average high temperature are January and December (30.9°F).

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

Average pressure
Sumatra, MT

Average pressure - Sumatra, MT

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

Average wind speed
Sumatra, MT

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 humidity
Sumatra, MT

Average humidity - Sumatra, MT

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).

Average rainfall
Sumatra, MT

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

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 - Sumatra, MT

The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Sumatra, MT

Average snowfall days - Sumatra, MT

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

Average daylight / Average sunshine
Sumatra, MT

Average daylight / Average sunshine - Sumatra, MT

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 18min).

Average sunshine days
Sumatra, MT

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

Average visibility - Sumatra, MT

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

Sumatra, Montana, USA

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