Climate and monthly weather forecastHarrison, MT
Climate and monthly weather forecast
Weather in January
January, the same as December, in Harrison, Montana, is another subzero cold winter month, with an average temperature varying between 13.8°F (-10.1°C) and 30.2°F (-1°C). Harrison's shift into January sets the average high-temperature at a still subzero cold 30.2°F (-1°C), a figure that deviates only slightly from December's 28°F (-2.2°C). Weather in January »Weather in February
February, the last month of the winter in Harrison, is another freezing cold month, with temperature in the range of an average low of 14.4°F (-9.8°C) and an average high of 30.9°F (-0.6°C). February's beginning signals an average high-temperature of a still subzero cold 30.9°F (-0.6°C), barely different from January's 30.2°F (-1°C). Weather in February »Weather in March
March, the first month of the spring in Harrison, is an icy month, with temperature in the range of an average high of 41°F (5°C) and an average low of 24.1°F (-4.4°C). An increase in the average high-temperature marks March, moving from February's freezing cold 30.9°F (-0.6°C) to an icy 41°F (5°C). Weather in March »Weather in April
April in Harrison, Montana, is a fresh spring month, with an average temperature varying between 50.4°F (10.2°C) and 30.4°F (-0.9°C). Entering April, Harrison sees a temperature rise, with the average high-temperature advancing from March's wintry 41°F (5°C) to a fresh 50.4°F (10.2°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Harrison, Montana, with an average temperature fluctuating between 62.6°F (17°C) and 37.9°F (3.3°C). The transition from April to May brings a temperature rise, with average high-temperatures increasing from a fresh 50.4°F (10.2°C) to a refreshing 62.6°F (17°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Harrison, Montana, with an average temperature fluctuating between 44.4°F (6.9°C) and 72.9°F (22.7°C). With the onset of June, Harrison sees a temperature rise, with the average high-temperature moving from May's refreshing 62.6°F (17°C) to a pleasant 72.9°F (22.7°C). Weather in June »Weather in July
July in Harrison, Montana, is a warm summer month, with an average temperature fluctuating between 83.5°F (28.6°C) and 50.2°F (10.1°C). July, marked by an average high-temperature of 83.5°F (28.6°C) and a low-temperature of 50.2°F (10.1°C), is the warmest month. In July, the average heat index is appraised at 84.2°F (29°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Harrison, Montana, with an average temperature fluctuating between 50.5°F (10.3°C) and 81.9°F (27.7°C). The beginning of August reveals an average high-temperature of a still moderately hot 81.9°F (27.7°C), showing minimal deviation from the previous month. Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Harrison, Montana, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 44.4°F (6.9°C). September comes with a drop in the average high-temperature, falling from August's moderately hot 81.9°F (27.7°C) to a pleasant 70.9°F (21.6°C). Weather in September »Weather in October
October, the same as September, is a cool autumn month in Harrison, Montana, with temperature in the range of an average high of 53.8°F (12.1°C) and an average low of 33.4°F (0.8°C). The shift into October is marked by a considerable temperature decrease, with the average high-temperature dropping from a pleasant 70.9°F (21.6°C) in September to a cool 53.8°F (12.1°C). Weather in October »Weather in November
November, the last month of the autumn in Harrison, is another cold month, with an average temperature fluctuating between 22.5°F (-5.3°C) and 39°F (3.9°C). As Harrison, Montana, welcomes November, there is a noticeable shift in the average high-temperature, dropping from October's cool 53.8°F (12.1°C) to a wintry 39°F (3.9°C). Weather in November »Weather in December
The first month of the winter, December, is still a freezing cold month in Harrison, Montana, with an average temperature varying between 12.7°F (-10.7°C) and 28°F (-2.2°C). Harrison reaches its lowest average temperatures in December, measuring 28°F (-2.2°C) at the peak and 12.7°F (-10.7°C) at the lowest. Weather in December »Updated: Aug 23, 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
With an average relative humidity of 85%, January is the most humid month in Harrison.
In Harrison, during the entire year, the rain falls for 134.2 days and collects up to 11.34" (288mm) of precipitation.
Months with snowfall are January through June, September through December.
In Harrison, during the entire year, snow falls for 79.6 days and aggregates up to 30.08" (764mm) of snow.
January has the least sunshine of the year, with an average of 5.9h of sunshine.
February is the month with the most snowfall. Snow falls for 16.5 days and accumulates 6.02" (153mm) 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.
June is the month with the most rainfall. Rain falls for 13.5 days and accumulates 1.57" (40mm) of precipitation.
The month with the longest days is June, with an average of 15h and 42min of daylight.
July is the month that records the highest temperatures, with averages ranging from a high of 83.5°F (28.6°C) to a low of 50.2°F (10.1°C).
July and August are months without snowfall.
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, with an average maximum UV index of 6.
August is the least humid month in Harrison, with an average relative humidity of 44%.
The month with the least rainfall is August, when the rain falls for 7.6 days and typically collects 0.51" (13mm) of precipitation.
The month of December sees the average lowest temperatures, reaching 28°F (-2.2°C) at the peak and 12.7°F (-10.7°C) at the low.
The month with the shortest days is December, with an average of 8h and 48min of daylight.
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Harrison, MT
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28°F).
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (12.7°F).
Average pressure
Harrison, MT
- Average pressure in January:
30.19"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.19"Hg
The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Harrison, MT
- Average wind speed in January:
4.8mph - Average wind speed in February:
4.9mph - Average wind speed in March:
5.1mph - Average wind speed in April:
5.5mph - Average wind speed in May:
5mph - Average wind speed in June:
4.8mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4.2mph - Average wind speed in September:
4.6mph - Average wind speed in October:
5.2mph - Average wind speed in November:
5mph - Average wind speed in December:
4.8mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity
Harrison, MT
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (44%).
Average rainfall
Harrison, MT
- Average rainfall in January:
0.63" - Average rainfall in February:
0.94" - Average rainfall in March:
1.06" - Average rainfall in April:
1.46" - Average rainfall in May:
1.42" - Average rainfall in June:
1.57"
- Average rainfall in July:
0.71" - Average rainfall in August:
0.51" - Average rainfall in September:
0.91" - Average rainfall in October:
0.71" - Average rainfall in November:
0.75" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days
Harrison, MT
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
11.9 days - Average rainfall days in March:
15 days - Average rainfall days in April:
16.5 days - Average rainfall days in May:
15.9 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
8.4 days - Average rainfall days in August:
7.6 days - Average rainfall days in September:
8.4 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.7 days - Average rainfall days in December:
9.5 days
The month with the highest number of rainy days is April (16.5 days).
The month with the least rainy days is August (7.6 days).
Average snowfall
Harrison, MT
- Average snowfall in January:
4.45" - Average snowfall in February:
6.02" - Average snowfall in March:
4.21" - Average snowfall in April:
3.86" - Average snowfall in May:
0.83" - Average snowfall in June:
0.04"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are July and August (0").
Average snowfall days
Harrison, MT
- Average snowfall days in January:
14.7 days - Average snowfall days in February:
16.5 days - Average snowfall days in March:
10.6 days - Average snowfall days in April:
7.5 days - Average snowfall days in May:
1.3 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:
0.5 days - Average snowfall days in October:
3.6 days - Average snowfall days in November:
10 days - Average snowfall days in December:
14.8 days
The month with the highest number of snowfall days is February (16.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Harrison, MT
- Average daylight in January:
9h and 12min - 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:
14h and 54min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 18min - 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 30min - Average daylight in December:
8h and 48min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
5h and 54min - Average sunshine in February:
6h and 24min - Average sunshine in March:
8h and 6min - Average sunshine in April:
9h and 48min - Average sunshine in May:
10h and 42min - Average sunshine in June:
11h and 24min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 42min - Average sunshine in September:
10h and 0min - Average sunshine in October:
7h and 18min - Average sunshine in November:
6h and 30min - Average sunshine in December:
6h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days
Harrison, MT
- Average sunshine days in January:
14.9 days - Average sunshine days in February:
9.5 days - Average sunshine days in March:
10.5 days - Average sunshine days in April:
9.3 days - Average sunshine days in May:
10.5 days - Average sunshine days in June:
13 days
- Average sunshine days in July:
18.4 days - Average sunshine days in August:
17.6 days - Average sunshine days in September:
18.7 days - Average sunshine days in October:
16.3 days - Average sunshine days in November:
15.8 days - Average sunshine days in December:
14.4 days
The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is April (9.3 days).
Average UV index
Harrison, MT
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Harrison, MT
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility
Harrison, MT
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
