Climate and monthly weather forecastMammoth, WY
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Mammoth, Wyoming, with temperature in the range of an average high of 21.9°F (-5.6°C) and an average low of 6.1°F (-14.4°C). January's weather records an average high-temperature of a still freezing cold 21.9°F (-5.6°C), showing little deviation from December. Weather in January »Weather in February
February, the last month of the winter in Mammoth, is another freezing cold month, with an average temperature varying between 23°F (-5°C) and 7.2°F (-13.8°C). The introduction of February sees an average high-temperature of a still subzero cold 23°F (-5°C), hardly deviating from January. Weather in February »Weather in March
March, the first month of the spring in Mammoth, is still a freezing cold month, with an average temperature fluctuating between 14.4°F (-9.8°C) and 30°F (-1.1°C). A gentle upsurge in temperatures occurs as February gives way to March, with average highs shifting from a freezing cold 23°F (-5°C) to a still subzero cold 30°F (-1.1°C). Weather in March »Weather in April
April in Mammoth, Wyoming, is a wintry spring month, with temperature in the range of an average low of 19.6°F (-6.9°C) and an average high of 37.2°F (2.9°C). Mammoth experiences a minor temperature shift with the start of April, with average high-temperatures moving from a subzero cold 30°F (-1.1°C) in March to a wintry 37.2°F (2.9°C). Weather in April »Weather in May
The last month of the spring, May, is a chilly month in Mammoth, Wyoming, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 49.8°F (9.9°C). In May, the average high-temperature increases from an icy 37.2°F (2.9°C) in April to a chilly 49.8°F (9.9°C). Weather in May »Weather in June
The first month of the summer, June, is a refreshing month in Mammoth, Wyoming, with an average temperature fluctuating between 61.9°F (16.6°C) and 37°F (2.8°C). The rise of average high-temperatures is seen in June, with an increase from a frosty 49.8°F (9.9°C) in May to a refreshing 61.9°F (16.6°C). Weather in June »Weather in July
July in Mammoth, Wyoming, is an agreeable summer month, with an average temperature fluctuating between 72.9°F (22.7°C) and 43.5°F (6.4°C). July, on average, is the warmest month, registering a high temperature of 72.9°F (22.7°C) and a low of 43.5°F (6.4°C). Weather in July »Weather in August
August, the last month of the summer in Mammoth, is another pleasant month, with an average temperature varying between 43.7°F (6.5°C) and 71.4°F (21.9°C). August's weather displays an average high-temperature of a still pleasant 71.4°F (21.9°C), slightly varied from July's 72.9°F (22.7°C). Weather in August »Weather in September
The first month of the autumn, September, is still a refreshing month in Mammoth, Wyoming, with an average temperature fluctuating between 61.9°F (16.6°C) and 37.6°F (3.1°C). Mammoth's transition into September involves a shift in temperature, receding from an agreeable 71.4°F (21.9°C) in August to an enjoyable 61.9°F (16.6°C). Weather in September »Weather in October
October, the same as September, in Mammoth, Wyoming, is a frosty autumn month, with an average temperature fluctuating between 26.1°F (-3.3°C) and 44.2°F (6.8°C). In Mammoth, the average high-temperature in October drops, from an enjoyable 61.9°F (16.6°C) in September, to a frosty 44.2°F (6.8°C). Weather in October »Weather in November
November, the last month of the autumn in Mammoth, is another freezing cold month, with temperature in the range of an average low of 14.2°F (-9.9°C) and an average high of 29.7°F (-1.3°C). The start of November brings a distinct shift in the average high-temperature, dropping from October's frosty 44.2°F (6.8°C) to a freezing cold 29.7°F (-1.3°C). Weather in November »Weather in December
December, the first month of the winter in Mammoth, is also a subzero cold month, with an average temperature ranging between max 20.1°F (-6.6°C) and min 4.8°F (-15.1°C). With average high and low temperatures of 20.1°F (-6.6°C) and 4.8°F (-15.1°C) respectively, December is Mammoth's coldest month. Weather in December »Updated: Feb 14, 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
Throughout the year, in Mammoth, there are 109.2 rainfall days, and 23.15" (588mm) of precipitation is accumulated.
January through July, September through December are months with snowfall.
In Mammoth, Wyoming, during the entire year, snow falls for 159.3 days and aggregates up to 120.47" (3060mm) of snow.
The months with the least sunshine in Mammoth are January, February and December, with an average of 3.3h of sunshine.
January through April, October through December, with an average maximum UV index of 1, are months with the lowest UV index in Mammoth.
February is the most humid month in Mammoth, Wyoming, with an average relative humidity of 95%.
February is the month with the most snowfall in Mammoth. Snow falls for 23.2 days and accumulates 17.83" (453mm) of snow.
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 17.4 days and accumulates 2.8" (71mm) of precipitation.
The month with the longest days in Mammoth, Wyoming, is June, with an average of 15h and 36min of daylight.
In Mammoth, July is identified by the average highest temperatures, reaching a peak of 72.9°F (22.7°C) and a low of 43.5°F (6.4°C).
The month with the least rainfall is July, when the rain falls for 11.9 days and typically collects 0.91" (23mm) of precipitation.
With an average of 11.8h of sunshine, July has the most sunshine of the year.
July is the month with the highest UV index in Mammoth, with an average maximum UV index of 5.
August is the least humid month in Mammoth, Wyoming, with an average relative humidity of 50%.
The only month without snowfall is August.
December, known for its average high temperature of 20.1°F (-6.6°C) and an average low temperature of 4.8°F (-15.1°C), is the coldest month in Mammoth, Wyoming.
With an average of 8h and 48min of daylight, December has the shortest days of the year in Mammoth, Wyoming.
Average temperature
Mammoth, WY
The warmest month (with the highest average high temperature) is July (72.9°F).
The month with the lowest average high temperature is December (20.1°F).
The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (4.8°F).
Average pressure
Mammoth, WY
- Average pressure in January:
30.24"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.94"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:
30.15"Hg - Average pressure in December:
30.23"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Mammoth, WY
- Average wind speed in January:
6.2mph - Average wind speed in February:
6.7mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.2mph - Average wind speed in May:
6mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6mph - Average wind speed in October:
6mph - Average wind speed in November:
6.2mph - Average wind speed in December:
6.2mph
The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity
Mammoth, WY
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is August (50%).
Average rainfall
Mammoth, WY
- Average rainfall in January:
2.09" - Average rainfall in February:
2.44" - Average rainfall in March:
2.28" - Average rainfall in April:
2.6" - Average rainfall in May:
2.8" - Average rainfall in June:
2.2"
- Average rainfall in July:
0.91" - Average rainfall in August:
1.18" - Average rainfall in September:
1.57" - Average rainfall in October:
1.46" - Average rainfall in November:
1.65" - Average rainfall in December:
1.97"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days
Mammoth, WY
- Average rainfall days in January:
2.2 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
6.6 days - Average rainfall days in April:
9.8 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
16.9 days
- Average rainfall days in July:
11.9 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
9 days - Average rainfall days in November:
5 days - Average rainfall days in December:
4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (2.2 days).
Average snowfall
Mammoth, WY
- Average snowfall in January:
17.36" - Average snowfall in February:
17.83" - Average snowfall in March:
17.64" - Average snowfall in April:
17.05" - Average snowfall in May:
8.23" - Average snowfall in June:
1.69"
- Average snowfall in July:
0.08" - Average snowfall in August:
0" - Average snowfall in September:
3.27" - Average snowfall in October:
7.32" - Average snowfall in November:
13.62" - Average snowfall in December:
16.38"
The month with the highest snowfall is February (17.83").
The month with the least snowfall is August (0").
Average snowfall days
Mammoth, WY
- Average snowfall days in January:
22.8 days - Average snowfall days in February:
23.2 days - Average snowfall days in March:
24.4 days - Average snowfall days in April:
19.9 days - Average snowfall days in May:
10.3 days - Average snowfall days in June:
2.7 days
- Average snowfall days in July:
0.2 days - Average snowfall days in August:
0.2 days - Average snowfall days in September:
2.4 days - Average snowfall days in October:
10.7 days - Average snowfall days in November:
19 days - Average snowfall days in December:
23.5 days
The month with the highest number of snowfall days is March (24.4 days).
The months with the least snowfall days are July and August (0.2 days).
Average daylight / Average sunshine
Mammoth, WY
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 12min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 48min
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:
3h and 18min - Average sunshine in February:
3h and 18min - Average sunshine in March:
4h and 42min - Average sunshine in April:
7h and 12min - Average sunshine in May:
9h and 36min - Average sunshine in June:
10h and 42min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 30min - Average sunshine in September:
9h and 48min - Average sunshine in October:
6h and 24min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 18min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 18min).
Average sunshine days
Mammoth, WY
- Average sunshine days in January:
8.6 days - Average sunshine days in February:
5.3 days - Average sunshine days in March:
6 days - Average sunshine days in April:
5.5 days - Average sunshine days in May:
5.5 days - Average sunshine days in June:
8.3 days
- Average sunshine days in July:
14.7 days - Average sunshine days in August:
13.9 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
10.9 days - Average sunshine days in December:
8.2 days
The months with the most sunshine days are July and September (14.7 days).
The month with the least sunshine days is February (5.3 days).
Average UV index
Mammoth, WY
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 1).
Average cloud cover
Mammoth, WY
The month with the most cloud cover is February (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility
Mammoth, WY
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).
