January weather forecast and climate
Helena, MT

The State Capital building of Montana in Helena city, set on a beautiful natural park
The State Capital building of Montana in Helena city, set on a beautiful natural park

Weather in January

January, like December, is a freezing cold winter month in Helena, Montana, with temperature in the range of an average high of 30.4°F (-0.9°C) and an average low of 16°F (-8.9°C).

Temperature

In Helena, the average high-temperature is essentially the same as in December - a still subzero cold 30.4°F (-0.9°C). In January, the average low-temperature is 16°F (-8.9°C).

Humidity

January is the most humid month, with an average relative humidity of 85%.

Rainfall

January and December are months with the least rain in Helena when the rain falls for 8.4 days and typically aggregates up to 0.63" (16mm) of rain.

Snowfall

Months with snowfall are January through May, September through December. In Helena, Montana, during January, snow falls for 13.3 days and regularly aggregates up to 4.41" (112mm) of snow. In Helena, during the entire year, snow falls for 80.4 days, and aggregates up to 34.88" (886mm) of snow.

Daylight

In Helena, the average length of the day is 9.1h.

Sunshine

With an average of 5.6h of sunshine, January has the least sunshine of the year in Helena.

UV index

The average daily maximum UV index in Helena is 2. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in January in Helena?

In January, the average high-temperature is 30.4°F (-0.9°C), and the average low-temperature is 16°F (-8.9°C).

What is the most humid month in Helena?

With an average relative humidity of 85%, January is the most humid month.

What is the average humidity in January in Helena?

In January, the average relative humidity in Helena, Montana, is 85%.

How much does it rain in Helena in January?

In Helena, Montana, in January, it is raining for 8.4 days, with typically 0.63" (16mm) of accumulated precipitation.

What is the driest month in Helena?

January and December are months with the least rain when the rain falls for 8.4 days and typically aggregates up to 0.63" (16mm) of rain.

How much does it snow in Helena in January?

In Helena, Montana, in January, during 13.3 snowfall days, 4.41" (112mm) of snow is typically accumulated.

How many hours of daylight does Helena have in January?

In Helena, Montana, the average length of the day in January is 9.1h.

What is the month with the least sunshine in Helena?

With an average of 5.6h of sunshine, January has the least sunshine of the year in Helena.

How many hours of sunshine does Helena have in January?

In January, the average sunshine in Helena is 5.6h.

How high is the UV index in January in Helena?

In Helena, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.

Average temperature in January
Helena, MT

Average temperature in January - Helena, MT
  • Average high temperature in January: 30.4°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (27.7°F).

  • Average low temperature in January: 16°F

The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is December (14.2°F).

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Average pressure in January
Helena, MT

Average pressure in January - Helena, MT
  • Average pressure in January: 30.18"

The month with the highest atmospheric pressure is January (30.18").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in January
Helena, MT

Average wind speed in January - Helena, MT
  • Average wind speed in January: 7mph

The windiest month (with the highest average wind speed) is November (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in January
Helena, MT

Average humidity in January - Helena, MT
  • Average humidity in January: 85%

The month with the highest relative humidity is January (85%).
Months with the lowest relative humidity are July and August (46%).

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Average rainfall in January
Helena, MT

Average rainfall in January - Helena, MT
  • Average rainfall in January: 0.63"

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.63").

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Average rainfall days in January
Helena, MT

Average rainfall days in January - Helena, MT
  • Average rainfall days in January: 8.4 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is November (7 days).

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Average snowfall in January
Helena, MT

Average snowfall in January - Helena, MT
  • Average snowfall in January: 4.41"

The month with the highest snowfall is February (6.18").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in January
Helena, MT

Average snowfall days in January - Helena, MT
  • Average snowfall days in January: 13.3 days

The month with the highest number of snowfall days is February (16.2 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in January /
Average sunshine in January
Helena, MT

Average daylight in January / Average sunshine in January - Helena, MT
  • Average daylight in January: 9.1h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in January: 5.6h

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

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Average sunshine days in January
Helena, MT

Average sunshine days in January - Helena, MT
  • Average sunshine days in January: 15.2 days

The month with the most sunshine days is July (20.5 days).
The month with the least sunshine days is April (9.8 days).

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Average UV index in January
Helena, MT

Average UV index in January - Helena, 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
Helena, MT

Average cloud cover in January - Helena, MT
  • Average cloud cover in January: 42

The month with the most cloud cover is February (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 15).

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Average visibility in January
Helena, MT

Average visibility in January - Helena, MT
  • Average visibility in January: 5mi

Months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February and December (5mi).

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