Climate and monthly weather forecast
Jefferson City, MT

Weather in January

January, like December, is a freezing cold winter month in Jefferson City, Montana, with an average temperature fluctuating between 14.5°F (-9.7°C) and 29.7°F (-1.3°C). In Jefferson City, the average high-temperature in January is practically the same as in December - a still freezing cold 29.7°F (-1.3°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Jefferson City, Montana, with an average temperature ranging between max 29.3°F (-1.5°C) and min 13.5°F (-10.3°C). In Jefferson City, the average high-temperature in February is relatively the same as in January - a still subzero cold 29.3°F (-1.5°C). 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). In Jefferson City, the average high-temperature in March increases from a subzero cold 29.3°F (-1.5°C) in February to a cold 38.7°F (3.7°C). Weather in March »

Weather in April

April is a frosty spring month in Jefferson City, Montana, with temperature in the range of an average high of 46.4°F (8°C) and an average low of 27°F (-2.8°C). In April, the average high-temperature slightly increases from a cold 38.7°F (3.7°C) in March to a chilly 46.4°F (8°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderate month in Jefferson City, Montana, with temperature in the range of an average high of 58.5°F (14.7°C) and an average low of 35.2°F (1.8°C). In May, the average high-temperature rises from a chilly 46.4°F (8°C) in April to a mild 58.5°F (14.7°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Jefferson City, Montana, with temperature in the range of an average high of 68.5°F (20.3°C) and an average low of 42.4°F (5.8°C). In June, the average high-temperature rises from a moderate 58.5°F (14.7°C) in May to a pleasant 68.5°F (20.3°C). Weather in June »

Weather in July

July in Jefferson City, Montana, is a warm summer month, 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). July is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 48.4°F (9.1°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Jefferson City, Montana, with an average temperature fluctuating between 48.6°F (9.2°C) and 77.5°F (25.3°C). In Jefferson City, the average high-temperature in August is relatively the same as in July - a still warm 77.5°F (25.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an enjoyable 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 67.5°F (19.7°C). In September, the average high-temperature drops from a moderately hot 77.5°F (25.3°C) in August to an enjoyable 67.5°F (19.7°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Jefferson City, Montana, with an average temperature ranging between max 50.9°F (10.5°C) and min 31.3°F (-0.4°C). In October, the average high-temperature plummets from a comfortable 67.5°F (19.7°C) in September to a fresh 50.9°F (10.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Jefferson City, is also a wintry month, with an average temperature ranging between min 21.2°F (-6°C) and max 36.9°F (2.7°C). In November, the average high-temperature decreases from a cool 50.9°F (10.5°C) in October to a wintry 36.9°F (2.7°C). Weather in November »

Weather in December

December, the first month of the winter in Jefferson City, is also a subzero cold month, with an average temperature fluctuating between 27°F (-2.8°C) and 12.6°F (-10.8°C). The coldest month is December, with an average high-temperature of 27°F (-2.8°C) and an average low-temperature of 12.6°F (-10.8°C). Weather in December »
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FAQ

What is the most humid month in Jefferson City?

January is the most humid month in Jefferson City, with an average relative humidity of 86%.

How many days does it rain in Jefferson City?

In Jefferson City, Montana, during the entire year, the rain falls for 133.7 days and collects up to 16.38" (416mm) of precipitation.

When does it snow in Jefferson City?

Months with snowfall in Jefferson City, Montana, are January through June, September through December.

How much does it snow in Jefferson City?

In Jefferson City, Montana, during the entire year, snow falls for 105.8 days and aggregates up to 55.12" (1400mm) of snow.

What is the month with the least sunshine in Jefferson City?

The months with the least sunshine in Jefferson City are January and December, with an average of 5.6h of sunshine.

What is the snowiest month in Jefferson City?

February is the month with the most snowfall in Jefferson City, Montana. Snow falls for 18 days and accumulates 9.72" (247mm) of snow.

What is the month with the lowest UV index in Jefferson City?

The month with the lowest UV index is February, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Jefferson City?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

What is the rainiest month in Jefferson City?

June is the month with the most rainfall. Rain falls for 16 days and accumulates 2.68" (68mm) of precipitation.

When are the longest days in Jefferson City?

June has the longest days of the year, with an average of 15h and 45min of daylight.

What is the warmest month in Jefferson City?

July is the warmest month in Jefferson City, Montana, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 48.4°F (9.1°C).

When it does not snow in Jefferson City?

July and August are months without snowfall.

What month has the most sunshine in Jefferson City?

July has the most sunshine of the year, with an average of 11.7h of sunshine.

When is the highest UV index in Jefferson City?

July is the month with the highest UV index in Jefferson City, Montana, with an average maximum UV index of 6.

What is the least humid month in Jefferson City?

August is the least humid month, with an average relative humidity of 46%.

What is the coldest month in Jefferson City?

With an average high-temperature of 27°F (-2.8°C) and an average low-temperature of 12.6°F (-10.8°C), December is the coldest month in Jefferson City, Montana.

What is the driest month in Jefferson City?

December is the month with the least rainfall. Rain falls for 8.2 days and accumulates 0.79" (20mm) of precipitation.

What is the month with the shortest days in Jefferson City?

December has the shortest days of the year in Jefferson City, with an average of 8h and 40min of daylight.

Average temperature
Jefferson City, MT

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).

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Average pressure
Jefferson City, MT

Average pressure - Jefferson City, MT

The month with the highest atmospheric pressure is January (30.19").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed
Jefferson City, MT

Average wind speed - Jefferson City, MT

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).

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Average humidity
Jefferson City, MT

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%).

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Average rainfall
Jefferson City, MT

Average rainfall - Jefferson City, MT

The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").

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Average rainfall days
Jefferson City, MT

Average rainfall days - Jefferson City, MT

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).

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Average snowfall
Jefferson City, MT

Average snowfall - Jefferson City, MT

The month with the highest snowfall is February (9.72").
The months with the least snowfall are July and August (0").

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Average snowfall days
Jefferson City, MT

Average snowfall days - Jefferson City, MT

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).

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Average daylight / Average sunshine
Jefferson City, MT

Average daylight / Average sunshine - Jefferson City, MT

The month with the longest days is June (Average daylight: 15h and 45min).
The month with the shortest days is December (Average daylight: 8h and 40min).

The month with the most sunshine is July (Average sunshine: 11.7h).
The months with the least sunshine are January and December (Average sunshine: 5.6).

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Average sunshine days
Jefferson City, MT

Average sunshine days - Jefferson City, MT

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).

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Average visibility
Jefferson City, MT

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).

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