Climate and monthly weather forecast
Jefferson City, MT

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Weather in January

January, like December, is a freezing cold winter month in Jefferson City, Montana, with an average temperature varying between 14.5°F (-9.7°C) and 29.7°F (-1.3°C). January's average high-temperature is a still subzero cold 29.7°F (-1.3°C), maintaining a close comparison with December's 27°F (-2.8°C). Weather in January »

Weather in February

February, the last month of the winter in Jefferson City, is also a subzero cold month, with temperature in the range of an average high of 29.3°F (-1.5°C) and an average low of 13.5°F (-10.3°C). Jefferson City, Montana, observes a minor difference in average high-temperatures between January's 29.7°F (-1.3°C) and February's 29.3°F (-1.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Jefferson City, Montana, with an average temperature varying between 21.6°F (-5.8°C) and 38.7°F (3.7°C). The shift into March is marked by a rise in the average high-temperature, moving from February's subzero cold 29.3°F (-1.5°C) to a wintry 38.7°F (3.7°C). Weather in March »

Weather in April

April is a chilly spring month in Jefferson City, Montana, with an average temperature varying between 27°F (-2.8°C) and 46.4°F (8°C). April witnesses a subtle temperature ascent, adjusting from a cold 38.7°F (3.7°C) in March to a frosty 46.4°F (8°C). Weather in April »

Weather in May

May, the last month of the spring in Jefferson City, is a moderate month, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 58.5°F (14.7°C). Jefferson City's weather in May shows a rise in the average high-temperature, moving up from April's frosty 46.4°F (8°C) 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). Jefferson City's June weather shows an increase in high-temperatures, moving from May's mild 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 an average temperature varying between 48.4°F (9.1°C) and 79.7°F (26.5°C). Jefferson City experiences its highest average temperatures in July, reaching a peak of 79.7°F (26.5°C) and a minimum 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 temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 77.5°F (25.3°C). The advent of August reveals an average high-temperature of a still warm 77.5°F (25.3°C), showing minimal difference from the prior month. Weather in August »

Weather in September

The first month of the autumn, September, is still a refreshing month in Jefferson City, Montana, with an average temperature fluctuating between 67.5°F (19.7°C) and 42.4°F (5.8°C). The onset of September coincides with a reduction in the average high-temperature, falling from a warm 77.5°F (25.3°C) in August to an enjoyable 67.5°F (19.7°C). Weather in September »

Weather in October

October, like September, in Jefferson City, Montana, is a cool autumn month, with an average temperature fluctuating between 50.9°F (10.5°C) and 31.3°F (-0.4°C). As Jefferson City, Montana, welcomes October, the average high-temperature witnesses a distinct drop, moving from a refreshing 67.5°F (19.7°C) in September to a cool 50.9°F (10.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Jefferson City, is also an icy month, with an average temperature fluctuating between 21.2°F (-6°C) and 36.9°F (2.7°C). November indicates a shift in the average high-temperature, from October's fresh 50.9°F (10.5°C) to an icy 36.9°F (2.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Jefferson City, Montana, with an average temperature fluctuating between 27°F (-2.8°C) and 12.6°F (-10.8°C). Jefferson City experiences its lowest average temperatures in December, reaching a peak of 27°F (-2.8°C) and a minimum of 12.6°F (-10.8°C). Weather in December »
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Frequently asked questions

What is the most humid month in Jefferson City?

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

How many days does it rain in Jefferson City?

Throughout the year, there are 133.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

When does it snow in Jefferson City?

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

How much does it snow in Jefferson City?

Throughout the year, in Jefferson City, there are 105.8 snowfall days, and 55.12" (1400mm) of snow is accumulated.

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

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

When does it snow the most in Jefferson City?

The month with the most snowfall is February, when snow falls for 18 days and typically aggregates up to 9.72" (247mm) of snow.

When is the lowest UV index in Jefferson City?

February is the month with the lowest UV index in Jefferson City, with an average maximum UV index of 1.

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

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Jefferson City, Montana, 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.

What is the rainiest month in Jefferson City?

The month with the most rainfall in Jefferson City is June, when the rain falls for 16 days and typically aggregates up to 2.68" (68mm) of precipitation.

When are the longest days in Jefferson City?

The month with the longest days in Jefferson City, Montana, is June, with an average of 15h and 42min of daylight.

What is the hottest time of year in Jefferson City?

July, with an average high of 79.7°F (26.5°C) and a low of 48.4°F (9.1°C), signifies the warmest month of the year.

When it does not snow in Jefferson City?

In Jefferson City, Montana, snow does not fall in July and August.

What month has the most sunshine in Jefferson City?

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

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

The month with the highest UV index is July, with an average maximum UV index of 6.

What is the least humid month in Jefferson City?

The least humid month in Jefferson City, Montana, is August, with an average relative humidity of 46%.

What month is the coldest in Jefferson City?

During the coldest month in Jefferson City, December, temperatures average a high of 27°F (-2.8°C) and a low of 12.6°F (-10.8°C).

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?

The month with the shortest days is December, with an average of 8h and 42min 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"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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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 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

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).

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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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Jefferson City, Montana, USA

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