Climate and monthly weather forecastAltamont, WY
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Altamont, Wyoming, with temperature in the range of an average low of 10.8°F (-11.8°C) and an average high of 27.7°F (-2.4°C). The advent of January observes an average high-temperature of a still subzero cold 27.7°F (-2.4°C), nearly identical to December's 26.4°F (-3.1°C). Weather in January »Weather in February
February, the last month of the winter in Altamont, is also a subzero cold month, with an average temperature varying between 28.8°F (-1.8°C) and 13.3°F (-10.4°C). With the onset of February, the average high-temperature registers at a still subzero cold 28.8°F (-1.8°C), subtly different from January's 27.7°F (-2.4°C). Weather in February »Weather in March
March, the first month of the spring in Altamont, is an icy month, with an average temperature ranging between max 35.4°F (1.9°C) and min 20.7°F (-6.3°C). March's arrival coincides with a marginal rise in the average high-temperature, moving from February's subzero cold 28.8°F (-1.8°C) to a wintry 35.4°F (1.9°C). Weather in March »Weather in April
April is a chilly spring month in Altamont, Wyoming, with an average temperature varying between 27.3°F (-2.6°C) and 44.6°F (7°C). Observing a rise in April, the average high-temperature goes from March's wintry 35.4°F (1.9°C) to a chilly 44.6°F (7°C). Weather in April »Weather in May
May, the last month of the spring in Altamont, is a mild month, with an average temperature varying between 35.4°F (1.9°C) and 56.7°F (13.7°C). The arrival of May brings a temperature shift, with the average high-temperature escalating from a frosty 44.6°F (7°C) in April to a refreshing 56.7°F (13.7°C). Weather in May »Weather in June
June, the first month of the summer in Altamont, is an agreeable month, with an average temperature ranging between max 70.2°F (21.2°C) and min 43.5°F (6.4°C). Altamont in June shows a temperature shift, moving from an average high of a moderate 56.7°F (13.7°C) in May to an agreeable 70.2°F (21.2°C). Weather in June »Weather in July
July in Altamont, Wyoming, is a moderately hot summer month, with an average temperature ranging between max 79.2°F (26.2°C) and min 51.6°F (10.9°C). The month of July sees the highest average temperatures, reaching 79.2°F (26.2°C) at the peak and 51.6°F (10.9°C) at the low. Weather in July »Weather in August
August, the last month of the summer in Altamont, is also a moderately hot month, with temperature in the range of an average low of 51.4°F (10.8°C) and an average high of 77.5°F (25.3°C). Altamont registers an average high-temperature of a still warm 77.5°F (25.3°C) at the commencement of August, closely related to the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Altamont, Wyoming, with an average temperature ranging between min 45°F (7.2°C) and max 68.5°F (20.3°C). The average high-temperature decreases in September, shifting from a moderately hot 77.5°F (25.3°C) in August to a pleasant 68.5°F (20.3°C). Weather in September »Weather in October
October, like September, in Altamont, Wyoming, is another fresh autumn month, with an average temperature ranging between max 51.8°F (11°C) and min 32.9°F (0.5°C). The changeover to October signals a significant decrease in the average high-temperature, dropping from a pleasant 68.5°F (20.3°C) in September to a fresh 51.8°F (11°C). Weather in October »Weather in November
November, the last month of the autumn in Altamont, is also a wintry month, with an average temperature varying between 38.8°F (3.8°C) and 22.1°F (-5.5°C). During the transition into November, Altamont observes a decrease in the average high-temperature, falling from a fresh 51.8°F (11°C) in October to a wintry 38.8°F (3.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a freezing cold month in Altamont, Wyoming, with an average temperature varying between 26.4°F (-3.1°C) and 10.9°F (-11.7°C). The coldest period is December, when temperatures fluctuate between an average high of 26.4°F (-3.1°C) and a low of 10.9°F (-11.7°C). Weather in December »Updated: Aug 12, 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
January and February, with an average relative humidity of 87%, are most humid months.
In Altamont, Wyoming, during the entire year, the rain falls for 94.2 days and collects up to 11.5" (292mm) of precipitation.
January through June, September through December are months with snowfall.
In Altamont, Wyoming, during the entire year, snow falls for 99.3 days and aggregates up to 56.22" (1428mm) of snow.
The month with the least sunshine in Altamont is January, with an average of 5.8h of sunshine.
March is the month with the most snowfall. Snow falls for 15.9 days and accumulates 10" (254mm) 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.
The months with the most rainfall are April and May, with an average 1.38" (35mm) of precipitation.
With an average of 15h and 6min of daylight, June has the longest days of the year in Altamont.
June through August, with an average maximum UV index of 5, are months with the highest UV index in Altamont, Wyoming.
July is the month when Altamont's temperatures reach their peak, with averages of 79.2°F (26.2°C) and lows of 51.6°F (10.9°C).
In Altamont, snow does not fall in July and August.
With an average relative humidity of 39%, August is the least humid month.
August is the month with the least rainfall. Rain falls for 7.3 days and accumulates 0.51" (13mm) of precipitation.
August has the most sunshine of the year, with an average of 12h of sunshine.
November and December, with an average maximum UV index of 1, are months with the lowest UV index in Altamont.
Altamont's temperature records reveal December as the coldest month, marked by average highs of 26.4°F (-3.1°C) and lows of 10.9°F (-11.7°C).
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Altamont, WY
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (26.4°F).
The month with the highest average low temperature is July (51.6°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure
Altamont, WY
- Average pressure in January:
30.29"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.9"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.24"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Altamont, WY
- Average wind speed in January:
7mph - Average wind speed in February:
7.8mph - Average wind speed in March:
7.5mph - Average wind speed in April:
8.2mph - Average wind speed in May:
7.5mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
7mph - Average wind speed in September:
7.3mph - Average wind speed in October:
7.6mph - Average wind speed in November:
7.8mph - Average wind speed in December:
6.8mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity
Altamont, WY
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is August (39%).
Average rainfall
Altamont, WY
- Average rainfall in January:
0.94" - Average rainfall in February:
1.1" - Average rainfall in March:
1.34" - Average rainfall in April:
1.38" - Average rainfall in May:
1.38" - Average rainfall in June:
0.75"
- Average rainfall in July:
0.59" - Average rainfall in August:
0.51" - Average rainfall in September:
0.71" - Average rainfall in October:
0.83" - Average rainfall in November:
0.83" - Average rainfall in December:
1.14"
The wettest months (with the highest rainfall) are April and May (1.38").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days
Altamont, WY
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
5.5 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
10.3 days - Average rainfall days in May:
11.9 days - Average rainfall days in June:
7.8 days
- Average rainfall days in July:
7.6 days - Average rainfall days in August:
7.3 days - Average rainfall days in September:
8 days - Average rainfall days in October:
5.8 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is February (5.5 days).
Average snowfall
Altamont, WY
- Average snowfall in January:
7.36" - Average snowfall in February:
7.72" - Average snowfall in March:
10" - Average snowfall in April:
8.03" - Average snowfall in May:
3.11" - Average snowfall in June:
0.91"
The month with the highest snowfall is March (10").
The months with the least snowfall are July and August (0").
Average snowfall days
Altamont, WY
- Average snowfall days in January:
14.3 days - Average snowfall days in February:
16.3 days - Average snowfall days in March:
15.9 days - Average snowfall days in April:
12.7 days - Average snowfall days in May:
5.8 days - Average snowfall days in June:
1 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
1.1 days - Average snowfall days in October:
5.5 days - Average snowfall days in November:
11.2 days - Average snowfall days in December:
15.5 days
The month with the highest number of snowfall days is February (16.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Altamont, WY
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 48min - Average sunshine in May:
11h and 6min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 18min - Average sunshine in October:
7h and 30min - Average sunshine in November:
6h and 48min - Average sunshine in December:
6h and 0min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days
Altamont, WY
- Average sunshine days in January:
16.3 days - Average sunshine days in February:
11.4 days - Average sunshine days in March:
12.4 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
19.5 days
- Average sunshine days in July:
17.3 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
17 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
15.1 days
The month with the most sunshine days is June (19.5 days).
The month with the least sunshine days is April (10.8 days).
Average UV index
Altamont, WY
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover
Altamont, WY
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility
Altamont, WY
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
