January 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).

Temperature

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). Jefferson City records an average low of 14.5°F (-9.7°C) throughout the nights in January.

Humidity

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

Rainfall

In Jefferson City, in January, it is raining for 7.9 days, with typically 0.83" (21mm) of accumulated precipitation. Throughout the year, in Jefferson City, there are 133.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall in Jefferson City. In Jefferson City, during January, snow falls for 16.3 days and regularly aggregates up to 6.57" (167mm) of snow. Throughout the year, in Jefferson City, there are 105.8 snowfall days, and 55.12" (1400mm) of snow is accumulated.

Daylight

In Jefferson City, Montana, the average length of the day in January is 9h and 5min.
On the first day of January in Jefferson City, sunrise is at 8:11 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 5:30 pm MST.

Sunshine

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

UV index

In Jefferson City, Montana, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: A maximum UV index of 2 in January translates into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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Frequently asked questions

How cold is it in Jefferson City in January?

The average high-temperature and low-temperature in Jefferson City during January are 29.7°F (-1.3°C) and 14.5°F (-9.7°C) respectively.

What is the most humid month in Jefferson City?

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

What is the average humidity in January in Jefferson City?

The average relative humidity in January in Jefferson City is 86%.

How many days does it rain in January in Jefferson City?

In January, the rain falls for 7.9 days. Throughout January, 0.83" (21mm) of precipitation is accumulated.

How much does it snow in Jefferson City in January?

In January, it is snowing for 16.3 days. Throughout January, 6.57" (167mm) of snow is accumulated.

How many hours of daylight does Jefferson City have in January?

The average day length in January in Jefferson City, Montana, is 9h and 5min.

What time are sunrise and sunset in January in Jefferson City?

In January, on the first day of the month, sunrise is at 8:11 am and sunset at 4:51 pm. On the last day of the month, in Jefferson City, sunrise is at 7:52 am and sunset at 5:30 pm MST.

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 in Jefferson City.

How long on average sun shines in January in Jefferson City?

In Jefferson City, Montana, the average sunshine duration in January is 5.6h.

How high is the UV index in January in Jefferson City?

In Jefferson City, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Jefferson City, MT

Average temperature in January - Jefferson City, MT
  • Average high temperature in January: 29.7°F

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).

  • Average low temperature in January: 14.5°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 in January
Jefferson City, MT

Average pressure in January - Jefferson City, MT
  • Average pressure in January: 30.19"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).

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Average wind speed in January
Jefferson City, MT

Average wind speed in January - Jefferson City, MT
  • Average wind speed in January: 6.5mph

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 in January
Jefferson City, MT

Average humidity in January - Jefferson City, MT
  • Average humidity in January: 86%

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 in January
Jefferson City, MT

Average rainfall in January - Jefferson City, MT
  • Average rainfall in January: 0.83"

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 in January
Jefferson City, MT

Average rainfall days in January - Jefferson City, MT
  • Average rainfall days in January: 7.9 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).

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Average snowfall in January
Jefferson City, MT

Average snowfall in January - Jefferson City, MT
  • Average snowfall in January: 6.57"

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 in January
Jefferson City, MT

Average snowfall days in January - Jefferson City, MT
  • Average snowfall days in January: 16.3 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).

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Average daylight in January /
Average sunshine in January
Jefferson City, MT

Average daylight in January / Average sunshine in January - Jefferson City, MT
  • Average daylight in January: 9h and 1min

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 4min

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 in January
Jefferson City, MT

Average sunshine days in January - Jefferson City, MT
  • Average sunshine days in January: 14.3 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).

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Average UV index in January
Jefferson City, MT

Average UV index in January - Jefferson City, MT
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in January
Jefferson City, MT

Average cloud cover in January - Jefferson City, MT
  • Average cloud cover in January: 44

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in January
Jefferson City, MT

Average visibility in January - Jefferson City, MT
  • Average visibility in January: 5mi

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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