Expand
Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is another subzero cold winter month in Mammoth, Montana, with an average temperature varying between 13.6°F (-10.2°C) and 28.8°F (-1.8°C). January's onset brings an average high-temperature of a still subzero cold 28.8°F (-1.8°C), showing a minute difference from December's 26.4°F (-3.1°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Mammoth, Montana, with an average temperature varying between 13.8°F (-10.1°C) and 29.3°F (-1.5°C). With the arrival of February, Mammoth's average high-temperature registers at a still subzero cold 29.3°F (-1.5°C), indicating a subtle variation from the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Mammoth, Montana, with an average temperature fluctuating between 21.9°F (-5.6°C) and 38.1°F (3.4°C). Mammoth's transition into March brings a slight rise in the average high-temperature, moving from a subzero cold 29.3°F (-1.5°C) in February to a wintry 38.1°F (3.4°C). Weather in March »
Weather in April
April in Mammoth, Montana, is a chilly spring month, with an average temperature ranging between min 27.7°F (-2.4°C) and max 46.4°F (8°C). The arrival of April witnesses a small shift in the average high-temperature, moving from a wintry 38.1°F (3.4°C) in March to a frosty 46.4°F (8°C). Weather in April »
Weather in May
May, the last month of the spring in Mammoth, is a moderate month, with an average temperature fluctuating between 35.2°F (1.8°C) and 58.1°F (14.5°C). May comes with an increase, with the average high-temperature moving from a chilly 46.4°F (8°C) in April to a mild 58.1°F (14.5°C). Weather in May »
Weather in June
The first month of the summer, June, is an agreeable month in Mammoth, Montana, with an average temperature varying between 41.9°F (5.5°C) and 68.5°F (20.3°C). The commencement of June sees a shift in the average high-temperature, moving from a moderate 58.1°F (14.5°C) in May to a pleasant 68.5°F (20.3°C). Weather in June »
Weather in July
July in Mammoth, Montana, is a warm summer month, with an average temperature varying between 79.5°F (26.4°C) and 47.7°F (8.7°C). In Mammoth, July is the warmest month, with temperatures averaging a high of 79.5°F (26.4°C) and a low of 47.7°F (8.7°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Mammoth, Montana, with temperature in the range of an average high of 78.3°F (25.7°C) and an average low of 47.1°F (8.4°C). The advent of August observes an average high-temperature of a still moderately hot 78.3°F (25.7°C), nearly identical to July's 79.5°F (26.4°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a comfortable month in Mammoth, Montana, with an average temperature fluctuating between 67.6°F (19.8°C) and 41.2°F (5.1°C). The commencement of September involves a temperature shift, with the average high-temperature dropping from a moderately hot 78.3°F (25.7°C) in August to a comfortable 67.6°F (19.8°C). Weather in September »
Weather in October
October, the same as September, is another fresh autumn month in Mammoth, Montana, with an average temperature fluctuating between 50.7°F (10.4°C) and 30.9°F (-0.6°C). The beginning of October marks a clear shift in the average high-temperature, receding from September's comfortable 67.6°F (19.8°C) to a fresh 50.7°F (10.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is also an icy month in Mammoth, Montana, with an average temperature varying between 36.5°F (2.5°C) and 20.3°F (-6.5°C). As November begins, there is a decrease in the average high-temperature, falling from a cool 50.7°F (10.4°C) in October to an icy 36.5°F (2.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Mammoth, Montana, with temperature in the range of an average high of 26.4°F (-3.1°C) and an average low of 11.3°F (-11.5°C). Mammoth's December weather, with an average high temperature of 26.4°F (-3.1°C) and an average low temperature of 11.3°F (-11.5°C), tends to be the coldest of the year. Weather in December »
[Resources]Frequently asked questions
What is the most humid month in Mammoth?
The most humid month is January, with an average relative humidity of 85%.
What is the driest month in Mammoth?
January is the month with the least rainfall. Rain falls for 11.7 days and accumulates 0.59" (15mm) of precipitation.
How many days does it rain in Mammoth?
Throughout the year, there are 158 rainfall days, and 12.2" (310mm) of precipitation is accumulated.
When does it snow in Mammoth?
January through April, October through December are months with snowfall.
How many days does it snow in Mammoth?
In Mammoth, during the entire year, snow falls for 20.8 days and aggregates up to 5.12" (130mm) of snow.
What is the month with the lowest UV index in Mammoth?
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
When does it snow the most in Mammoth?
The month with the most snowfall in Mammoth is February, when snow falls for 6.2 days and typically aggregates up to 1.81" (46mm) of snow.
When is Daylight Saving Time (DST) in Mammoth?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mammoth, 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 rainiest month in Mammoth?
The month with the most rainfall in Mammoth, Montana, is May, when the rain falls for 18.4 days and typically aggregates up to 1.85" (47mm) of precipitation.
When it does not snow in Mammoth?
In Mammoth, Montana, snow does not fall in May through September.
When are the longest days in Mammoth?
The month with the longest days in Mammoth, Montana, is June, with an average of 15h and 36min of daylight.
What month is the hottest in Mammoth?
July is the month when Mammoth, Montana, sees the average highest temperatures, with a high of 79.5°F (26.4°C) and a low of 47.7°F (8.7°C).
What are the least humid months in Mammoth?
July and August, with an average relative humidity of 46%, are the least humid months in Mammoth, Montana.
What month has the most sunshine in Mammoth?
The month with the most sunshine in Mammoth is July, with an average of 11.9h of sunshine.
When is the highest UV index in Mammoth?
With an average maximum UV index of 5, July is the month with the highest UV index in Mammoth, Montana.
What are the coldest months in Mammoth?
December is the coldest month in Mammoth, with the temperature often reaching an average high of 26.4°F (-3.1°C) and an average low of 11.3°F (-11.5°C).
What is the month with the shortest days in Mammoth?
December has the shortest days of the year, with an average of 8h and 48min of daylight.
What is the month with the least sunshine in Mammoth?
With an average of 6h of sunshine, December has the least sunshine of the year.
Average temperature
Mammoth, MT
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is December (26.4°F).
The month with the highest average low temperature is July (47.7°F).
The coldest month (with the lowest average low temperature) is December (11.3°F).
Average pressure
Mammoth, MT
- Average pressure in January:
30.23"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.22"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Mammoth, MT
- Average wind speed in January:
6.2mph - Average wind speed in February:
6.1mph - Average wind speed in March:
6.2mph - Average wind speed in April:
6.1mph - Average wind speed in May:
5.4mph - Average wind speed in June:
5.3mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.6mph - Average wind speed in September:
5mph - Average wind speed in October:
5.9mph - Average wind speed in November:
6.3mph - Average wind speed in December:
6.1mph
The windiest month (with the highest average wind speed) is November (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity
Mammoth, MT
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall
Mammoth, MT
- Average rainfall in January:
0.59" - Average rainfall in February:
0.87" - Average rainfall in March:
0.98" - Average rainfall in April:
1.57" - Average rainfall in May:
1.85" - Average rainfall in June:
1.77"
- Average rainfall in July:
0.67" - Average rainfall in August:
0.63" - Average rainfall in September:
0.98" - Average rainfall in October:
0.87" - Average rainfall in November:
0.71" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days
Mammoth, MT
- Average rainfall days in January:
11.7 days - Average rainfall days in February:
12.8 days - Average rainfall days in March:
16.4 days - Average rainfall days in April:
18.6 days - Average rainfall days in May:
18.4 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
8.8 days - Average rainfall days in August:
8.6 days - Average rainfall days in September:
10.3 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
11.1 days - Average rainfall days in December:
11.9 days
The month with the highest number of rainy days is April (18.6 days).
The month with the least rainy days is August (8.6 days).
Average snowfall
Mammoth, MT
The month with the highest snowfall is February (1.81").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Mammoth, MT
- Average snowfall days in January:
4.5 days - Average snowfall days in February:
6.2 days - Average snowfall days in March:
1.6 days - Average snowfall days in April:
1.2 days - Average snowfall days in May:
0 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 days - Average snowfall days in October:
0.5 days - Average snowfall days in November:
2.3 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is February (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Mammoth, MT
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 3min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
6h and 4min - Average sunshine in March:
8h and 2min - Average sunshine in April:
9h and 5min - Average sunshine in May:
10h and 4min - Average sunshine in June:
11h and 3min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 4min - Average sunshine in September:
9h and 5min - Average sunshine in October:
7h and 2min - Average sunshine in November:
6h and 4min - Average sunshine in December:
6h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days
Mammoth, MT
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
10.8 days - Average sunshine days in March:
11.6 days - Average sunshine days in April:
7.8 days - Average sunshine days in May:
9.1 days - Average sunshine days in June:
10.7 days
- Average sunshine days in July:
17.8 days - Average sunshine days in August:
17.3 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
15.8 days - Average sunshine days in November:
15.7 days - Average sunshine days in December:
14.8 days
The month with the most sunshine days is July (17.8 days).
The month with the least sunshine days is April (7.8 days).
Average UV index
Mammoth, MT
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover
Mammoth, MT
The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility
Mammoth, MT
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Mammoth, Montana, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
