Climate and monthly weather forecastHalfmoon, MT
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Halfmoon, Montana, with an average temperature varying between 27.1°F (-2.7°C) and 14.4°F (-9.8°C). Halfmoon greets January with an average high-temperature of a still subzero cold 27.1°F (-2.7°C), marking a slight deviation from the preceding month. Weather in January »Weather in February
The last month of the winter, February, is another freezing cold month in Halfmoon, Montana, with an average temperature varying between 28.2°F (-2.1°C) and 13.5°F (-10.3°C). Halfmoon's weather in February indicates an average high-temperature of a still subzero cold 28.2°F (-2.1°C), nearly consistent with the 27.1°F (-2.7°C) of January. Weather in February »Weather in March
The first month of the spring, March, is a cold month in Halfmoon, Montana, with an average temperature fluctuating between 21.6°F (-5.8°C) and 36.1°F (2.3°C). Observing a slight rise in March, the average high-temperature shifts from February's freezing cold 28.2°F (-2.1°C) to a wintry 36.1°F (2.3°C). Weather in March »Weather in April
April in Halfmoon, Montana, is a chilly spring month, with an average temperature fluctuating between 28°F (-2.2°C) and 46.6°F (8.1°C). As April arrives, a rise in the average high-temperature is observed, moving from a wintry 36.1°F (2.3°C) in March to a chilly 46.6°F (8.1°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Halfmoon, Montana, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 59.5°F (15.3°C). With the onset of May, Halfmoon's average high-temperature experiences a rise, moving from April's chilly 46.6°F (8.1°C) to a moderate 59.5°F (15.3°C). Weather in May »Weather in June
The first month of the summer, June, is a comfortable month in Halfmoon, Montana, with an average temperature varying between 41.2°F (5.1°C) and 66.4°F (19.1°C). The shift into June is marked by a modest rise in the average high-temperature, moving from May's refreshing 59.5°F (15.3°C) to a comfortable 66.4°F (19.1°C). Weather in June »Weather in July
July in Halfmoon, Montana, is a moderately hot summer month, with an average temperature ranging between max 77.9°F (25.5°C) and min 45.1°F (7.3°C). In Halfmoon, July is the warmest month, with temperatures averaging a high of 77.9°F (25.5°C) and a low of 45.1°F (7.3°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Halfmoon, Montana, with an average temperature varying between 45.5°F (7.5°C) and 76.8°F (24.9°C). In the transition from July to August, Halfmoon reports an average high-temperature of a still warm 76.8°F (24.9°C), indicating a close resemblance to the prior month. Weather in August »Weather in September
The first month of the autumn, September, is still a refreshing month in Halfmoon, Montana, with an average temperature varying between 65.5°F (18.6°C) and 39.2°F (4°C). The arrival of September corresponds with a reduction in the average high-temperature, down from August's warm 76.8°F (24.9°C) to a comfortable 65.5°F (18.6°C). Weather in September »Weather in October
October, the same as September, in Halfmoon, Montana, is a frosty autumn month, with an average temperature varying between 30.7°F (-0.7°C) and 48.4°F (9.1°C). The transition from September to October brings a clear temperature drop, with average high-temperatures decreasing from a refreshing 65.5°F (18.6°C) to a chilly 48.4°F (9.1°C). Weather in October »Weather in November
The last month of the autumn, November, is also a wintry month in Halfmoon, Montana, with an average temperature varying between 34.5°F (1.4°C) and 23°F (-5°C). November brings a decrease in the average high-temperature, shifting from a frosty 48.4°F (9.1°C) in October to an icy 34.5°F (1.4°C). Weather in November »Weather in December
December, the first month of the winter in Halfmoon, is still a freezing cold month, with an average temperature ranging between max 25.7°F (-3.5°C) and min 13.8°F (-10.1°C). In Halfmoon, the month of December is known for its lowest average temperatures, reaching a high of 25.7°F (-3.5°C) and a low of 13.8°F (-10.1°C). Weather in December »Updated: Aug 3, 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 most humid month is January, with an average relative humidity of 93%.
In Halfmoon, during the entire year, the rain falls for 126.4 days and collects up to 11.22" (285mm) of precipitation.
Months with snowfall in Halfmoon are January through May, September through December.
January is the month with the most snowfall. Snow falls for 18.9 days and accumulates 7.72" (196mm) of snow.
In Halfmoon, during the entire year, snow falls for 97 days and aggregates up to 33.86" (860mm) of snow.
With an average of 3.5h of sunshine, January has the least sunshine of the year in Halfmoon.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Halfmoon, 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.
June is the month with the most rainfall. Rain falls for 13.7 days and accumulates 1.42" (36mm) of precipitation.
June through August are months without snowfall.
The month with the longest days is June, with an average of 16h and 0min of daylight.
Halfmoon records the warmest temperatures in July, averaging a high of 77.9°F (25.5°C) and a low of 45.1°F (7.3°C).
With an average of 11.9h of sunshine, July has the most sunshine of the year.
July is the month with the highest UV index, with an average maximum UV index of 6.
With an average relative humidity of 55%, August is the least humid month.
August is the month with the least rainfall. Rain falls for 6.3 days and accumulates 0.43" (11mm) of precipitation.
Halfmoon's temperature records reveal December as the coldest month, marked by average highs of 25.7°F (-3.5°C) and lows of 13.8°F (-10.1°C).
December has the shortest days of the year, with an average of 8h and 24min of daylight.
Average temperature
Halfmoon, MT
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is December (25.7°F).
The month with the highest average low temperature is August (45.5°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).
Average pressure
Halfmoon, MT
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.15"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Halfmoon, MT
- Average wind speed in January:
3.9mph - Average wind speed in February:
4mph - Average wind speed in March:
4.3mph - Average wind speed in April:
4.6mph - Average wind speed in May:
4.4mph - Average wind speed in June:
4.3mph
The windiest month (with the highest average wind speed) is April (4.6mph).
The calmest months (with the lowest average wind speed) are August and December (3.7mph).
Average humidity
Halfmoon, MT
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (55%).
Average rainfall
Halfmoon, MT
- Average rainfall in January:
1.02" - Average rainfall in February:
0.87" - Average rainfall in March:
1.14" - Average rainfall in April:
0.98" - Average rainfall in May:
1.1" - Average rainfall in June:
1.42"
- Average rainfall in July:
0.47" - Average rainfall in August:
0.43" - Average rainfall in September:
0.71" - Average rainfall in October:
0.91" - Average rainfall in November:
1.14" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is June (1.42").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days
Halfmoon, MT
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
7.7 days - Average rainfall days in March:
13.5 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
13.7 days
- Average rainfall days in July:
6.9 days - Average rainfall days in August:
6.3 days - Average rainfall days in September:
8.5 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
11.5 days - Average rainfall days in December:
8.9 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is August (6.3 days).
Average snowfall
Halfmoon, MT
- Average snowfall in January:
7.72" - Average snowfall in February:
6.26" - Average snowfall in March:
5.08" - Average snowfall in April:
2.09" - Average snowfall in May:
0.55" - Average snowfall in June:
0"
The month with the highest snowfall is January (7.72").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Halfmoon, MT
- Average snowfall days in January:
18.9 days - Average snowfall days in February:
17.3 days - Average snowfall days in March:
15.7 days - Average snowfall days in April:
7.4 days - Average snowfall days in May:
1.5 days - Average snowfall days in June:
0.1 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.3 days - Average snowfall days in October:
3.5 days - Average snowfall days in November:
13.2 days - Average snowfall days in December:
19.1 days
The month with the highest number of snowfall days is December (19.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Halfmoon, MT
- Average daylight in January:
8h and 54min - Average daylight in February:
10h and 12min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 42min - Average daylight in May:
15h and 12min - Average daylight in June:
16h and 0min
- Average daylight in July:
15h and 36min - Average daylight in August:
14h and 18min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 12min - Average daylight in December:
8h and 24min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
3h and 30min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 6min - Average sunshine in April:
8h and 36min - Average sunshine in May:
10h and 24min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
11h and 42min - Average sunshine in September:
9h and 24min - Average sunshine in October:
6h and 42min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Halfmoon, MT
- Average sunshine days in January:
11.3 days - Average sunshine days in February:
10 days - Average sunshine days in March:
7.7 days - Average sunshine days in April:
9.8 days - Average sunshine days in May:
14.2 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
21.5 days - Average sunshine days in August:
21.4 days - Average sunshine days in September:
19 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
11.6 days - Average sunshine days in December:
11.8 days
The month with the most sunshine days is July (21.5 days).
The month with the least sunshine days is March (7.7 days).
Average UV index
Halfmoon, MT
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover
Halfmoon, MT
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility
Halfmoon, MT
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
