Climate and monthly weather forecastSumatra, MT
Climate and monthly weather forecast
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
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The temperature hits its lowest levels in January and December, recording an average high-temperature of 30.9°F (-0.6°C).
The most humid month is January, with an average relative humidity of 79%.
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.
In Sumatra, during the entire year, the rain falls for 99.5 days and collects up to 11.06" (281mm) of precipitation.
Months with snowfall in Sumatra are January through May, September through December.
In Sumatra, during the entire year, snow falls for 47 days and aggregates up to 15.83" (402mm) of snow.
February is the month with the most snowfall in Sumatra, Montana. Snow falls for 10.3 days and accumulates 3.74" (95mm) of snow.
February and December, with an average of 5.3h of sunshine, are months with the least sunshine 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.
May is the month with the most rainfall. Rain falls for 13.7 days and accumulates 1.81" (46mm) of precipitation.
In Sumatra, snow does not fall in June through August.
The month with the longest days in Sumatra, Montana, is June, with an average of 15h and 48min of daylight.
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).
The month with the most sunshine is July, with an average of 11.8h of sunshine.
With an average maximum UV index of 7, July is the month with the highest UV index in Sumatra.
The least humid month in Sumatra is August, with an average relative humidity of 38%.
The month with the shortest days in Sumatra is December, with an average of 8h and 36min of daylight.
With an average maximum UV index of 1, December is the month with the lowest UV index in Sumatra, Montana.
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 in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.89"Hg - Average pressure in September:
29.93"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.12"Hg
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 in January:
9.8mph - Average wind speed in February:
8.9mph - Average wind speed in March:
9mph - Average wind speed in April:
10.3mph - Average wind speed in May:
10mph - Average wind speed in June:
9.2mph
- Average wind speed in July:
8.2mph - Average wind speed in August:
8.3mph - Average wind speed in September:
8.8mph - Average wind speed in October:
9.7mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.4mph
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
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 in January:
0.47" - Average rainfall in February:
0.59" - Average rainfall in March:
0.67" - Average rainfall in April:
1.26" - Average rainfall in May:
1.81" - Average rainfall in June:
1.42"
- Average rainfall in July:
0.87" - Average rainfall in August:
0.98" - Average rainfall in September:
1.26" - Average rainfall in October:
0.79" - Average rainfall in November:
0.47" - Average rainfall in December:
0.47"
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 in January:
4.2 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
12.1 days - Average rainfall days in May:
13.7 days - Average rainfall days in June:
11.3 days
- Average rainfall days in July:
10.4 days - Average rainfall days in August:
10.4 days - Average rainfall days in September:
7.9 days - Average rainfall days in October:
8.6 days - Average rainfall days in November:
4.8 days - Average rainfall days in December:
4 days
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 in January:
2.52" - Average snowfall in February:
3.74" - Average snowfall in March:
2.05" - Average snowfall in April:
2.2" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
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 in January:
9.5 days - Average snowfall days in February:
10.3 days - Average snowfall days in March:
6 days - Average snowfall days in April:
4.1 days - Average snowfall days in May:
0.4 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
2 days - Average snowfall days in November:
5.2 days - Average snowfall days in December:
9.4 days
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 in January:
9h and 6min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 48min
- Average daylight in July:
15h and 24min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 24min - Average daylight in December:
8h and 36min
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).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
5h and 18min - Average sunshine in March:
7h and 24min - Average sunshine in April:
9h and 12min - Average sunshine in May:
10h and 6min - Average sunshine in June:
11h and 18min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 42min - Average sunshine in September:
10h and 24min - Average sunshine in October:
6h and 24min - Average sunshine in November:
6h and 18min - Average sunshine in December:
5h and 18min
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 in January:
18.5 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
15.1 days - Average sunshine days in June:
16 days
- Average sunshine days in July:
15.3 days - Average sunshine days in August:
16.5 days - Average sunshine days in September:
19.7 days - Average sunshine days in October:
18.9 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
18.6 days
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 UV index
Sumatra, MT
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Sumatra, MT
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 15).
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).
