January 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).

Temperature

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). In January, in Jefferson City, the average low-temperature is 14.5°F (-9.7°C).

Humidity

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

Rainfall

In Jefferson City, Montana, during 7.9 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. In Jefferson City, during the entire year, the rain falls for 133.7 days and collects up to 16.38" (416mm) of precipitation.

Snowfall

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

Daylight

In January, the average length of the day is 9h and 5min.
On the first day of the month, sunrise is at 8:11 am and sunset at 4:52 pm. On the last day of January, in Jefferson City, sunrise is at 7:52 am and sunset at 5:31 pm MST.

Sunshine

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

UV index

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 hazard from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in January interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the most humid month in Jefferson City?

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

What is the average humidity in January in Jefferson City?

In Jefferson City, Montana, the average relative humidity in January is 86%.

How much does it rain in Jefferson City in January?

In Jefferson City, in January, it is raining for 7.9 days, with typically 0.83" (21mm) of accumulated precipitation.

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

In Jefferson City, in January, snow falls for 16.3 days, with typically accumulated 6.57" (167mm) of snow.

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

The average day length in January in Jefferson City 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 4:52 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 5:31 pm MST.

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

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

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

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

What is the UV index intensity in January in Jefferson City?

The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
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 5min

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).

  • Average sunshine in January: 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).

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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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