Climate and monthly weather forecastJefferson City, MT
Climate and monthly weather forecast
Weather in January
January, the same as December, in Jefferson City, Montana, is another subzero cold winter month, with an average temperature ranging between max 29.7°F (-1.3°C) and min 14.5°F (-9.7°C). The onset of January notes an average high-temperature of a still subzero cold 29.7°F (-1.3°C), subtly shifted from December's 27°F (-2.8°C). Weather in January »Weather in February
February, the last month of the winter in Jefferson City, is another freezing cold month, with an average temperature fluctuating between 13.5°F (-10.3°C) and 29.3°F (-1.5°C). The advent of February signifies a minor shift to an average high-temperature of a still subzero cold 29.3°F (-1.5°C), aligning closely with January. Weather in February »Weather in March
March, the first month of the spring in Jefferson City, is a wintry month, with an average temperature varying between 21.6°F (-5.8°C) and 38.7°F (3.7°C). March's arrival signals an increase in average high-temperatures, moving from February's subzero cold 29.3°F (-1.5°C) to an icy 38.7°F (3.7°C). Weather in March »Weather in April
April is a frosty spring month in Jefferson City, Montana, with an average temperature fluctuating between 27°F (-2.8°C) and 46.4°F (8°C). The shift into April is characterized by a subtle rise in the average high-temperature, transitioning from March's icy 38.7°F (3.7°C) to a chilly 46.4°F (8°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Jefferson City, Montana, with an average temperature varying between 58.5°F (14.7°C) and 35.2°F (1.8°C). The arrival of May sees a shift in the average high-temperature, moving from a chilly 46.4°F (8°C) in April to a moderate 58.5°F (14.7°C). Weather in May »Weather in June
The first month of the summer, June, is a pleasant month in Jefferson City, Montana, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 68.5°F (20.3°C). With the onset of June, Jefferson City's average high-temperature sees a rise, moving from May's moderate 58.5°F (14.7°C) to an agreeable 68.5°F (20.3°C). Weather in June »Weather in July
July is a warm summer month in Jefferson City, Montana, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 48.4°F (9.1°C). In Jefferson City, the month of July registers the highest temperatures, averaging 79.7°F (26.5°C) at the peak and 48.4°F (9.1°C) at the lowest. Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Jefferson City, Montana, with an average temperature varying between 77.5°F (25.3°C) and 48.6°F (9.2°C). Entering August, Jefferson City's average high-temperature reads a still moderately hot 77.5°F (25.3°C), indicating a close resemblance to the previous month's climate. Weather in August »Weather in September
The first month of the autumn, September, is still a comfortable month in Jefferson City, Montana, with temperature in the range of an average high of 67.5°F (19.7°C) and an average low of 42.4°F (5.8°C). September's onset brings a reduction in the average high-temperature, from a warm 77.5°F (25.3°C) in August to a comfortable 67.5°F (19.7°C). Weather in September »Weather in October
October, the same as September, is a cool autumn month in Jefferson City, Montana, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 50.9°F (10.5°C). October's arrival signals a distinct temperature shift, dropping from a comfortable 67.5°F (19.7°C) in September to a cool 50.9°F (10.5°C). Weather in October »Weather in November
The last month of the autumn, November, is another cold month in Jefferson City, Montana, with temperature in the range of an average high of 36.9°F (2.7°C) and an average low of 21.2°F (-6°C). November's arrival coincides with a drop in the average high-temperature, decreasing from October's cool 50.9°F (10.5°C) to a cold 36.9°F (2.7°C). Weather in November »Weather in December
December, the first month of the winter in Jefferson City, is still a freezing cold month, with an average temperature fluctuating between 27°F (-2.8°C) and 12.6°F (-10.8°C). December, recording an average high temperature of 27°F (-2.8°C) and a low temperature of 12.6°F (-10.8°C), is Jefferson City's coldest month. Weather in December »Updated: Jul 28, 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 86%.
Throughout the year, there are 133.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.
Months with snowfall are January through June, September through December.
Throughout the year, there are 105.8 snowfall days, and 55.12" (1400mm) of snow is accumulated.
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.
The month with the most snowfall is February, when snow falls for 18 days and typically aggregates up to 9.72" (247mm) of snow.
With an average maximum UV index of 1, February is the month with the lowest UV index.
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 16 days and accumulates 2.68" (68mm) of precipitation.
The month with the longest days is June, with an average of 15h and 42min of daylight.
July temperatures tend to peak at an average high of 79.7°F (26.5°C) and dip to a low of 48.4°F (9.1°C).
In Jefferson City, snow does not fall in July and August.
The month with the most sunshine is July, with an average of 11.7h of sunshine.
The month with the highest UV index in Jefferson City is July, with an average maximum UV index of 6.
August is the least humid month, with an average relative humidity of 46%.
December, on average, is the coldest month, registering a high temperature of 27°F (-2.8°C) and a low of 12.6°F (-10.8°C).
The month with the least rainfall is December, when the rain falls for 8.2 days and typically collects 0.79" (20mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 42min of daylight.
Average temperature
Jefferson City, MT
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (27°F).
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure
Jefferson City, 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:
29.98"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"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:
30.11"Hg - Average pressure in December:
30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Jefferson City, MT
- Average wind speed in January:
6.5mph - Average wind speed in February:
6.2mph - Average wind speed in March:
6.2mph - Average wind speed in April:
6.4mph - Average wind speed in May:
5.4mph - Average wind speed in June:
5.6mph
- Average wind speed in July:
4.9mph - Average wind speed in August:
4.7mph - Average wind speed in September:
5.4mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.5mph - Average wind speed in December:
6.4mph
The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity
Jefferson City, MT
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).
Average rainfall
Jefferson City, MT
- Average rainfall in January:
0.83" - Average rainfall in February:
1.22" - Average rainfall in March:
1.46" - Average rainfall in April:
2.01" - Average rainfall in May:
2.36" - Average rainfall in June:
2.68"
- Average rainfall in July:
1.02" - Average rainfall in August:
0.91" - Average rainfall in September:
1.14" - Average rainfall in October:
1.06" - Average rainfall in November:
0.91" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").
Average rainfall days
Jefferson City, MT
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
8.7 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
18.2 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
9.9 days - Average rainfall days in August:
9.8 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
11 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).
Average snowfall
Jefferson City, MT
- Average snowfall in January:
6.57" - Average snowfall in February:
9.72" - Average snowfall in March:
9.53" - Average snowfall in April:
7.8" - Average snowfall in May:
2.64" - Average snowfall in June:
0.31"
The month with the highest snowfall is February (9.72").
The months with the least snowfall are July and August (0").
Average snowfall days
Jefferson City, MT
- Average snowfall days in January:
16.3 days - Average snowfall days in February:
18 days - Average snowfall days in March:
16.9 days - Average snowfall days in April:
12.3 days - Average snowfall days in May:
4.4 days - Average snowfall days in June:
0.9 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
1.2 days - Average snowfall days in October:
6.5 days - Average snowfall days in November:
12.5 days - Average snowfall days in December:
16.8 days
The month with the highest number of snowfall days is February (18 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Jefferson City, MT
- Average daylight in January:
9h and 6min - 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:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 24min - 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 24min - Average daylight in December:
8h and 42min
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 42min).
- Average sunshine in January:
5h and 36min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 36min - Average sunshine in April:
9h and 6min - Average sunshine in May:
10h and 12min - Average sunshine in June:
11h and 6min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 30min - Average sunshine in September:
9h and 48min - Average sunshine in October:
7h and 0min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days
Jefferson City, MT
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
8.5 days - Average sunshine days in March:
9.2 days - Average sunshine days in April:
8.9 days - Average sunshine days in May:
9.3 days - Average sunshine days in June:
10.7 days
- Average sunshine days in July:
17 days - Average sunshine days in August:
17 days - Average sunshine days in September:
17.9 days - Average sunshine days in October:
15 days - Average sunshine days in November:
14.9 days - Average sunshine days in December:
13.7 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).
Average UV index
Jefferson City, MT
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover
Jefferson City, MT
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility
Jefferson City, MT
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, February, March and December (5mi).
