January weather forecast and climate
Grantsdale, MT

January, like December, is another subzero cold winter month in Grantsdale, Montana, with temperature in the range of an average low of 16.2°F (-8.8°C) and an average high of 28.8°F (-1.8°C).

Temperature

In Grantsdale, the average high-temperature is relatively the same as in December - a still subzero cold 28.8°F (-1.8°C). In January, in Grantsdale, the average low-temperature is 16.2°F (-8.8°C).

Humidity

The most humid month in Grantsdale is January, with an average relative humidity of 89%.

Rainfall

In Grantsdale, Montana, during January, the rain falls for 11.9 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Grantsdale, during the entire year, the rain falls for 163.6 days and collects up to 20.83" (529mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In Grantsdale, during January, snow falls for 18.6 days and regularly aggregates up to 11.89" (302mm) of snow. In Grantsdale, during the entire year, snow falls for 101.1 days, and aggregates up to 59.17" (1503mm) of snow.

Daylight

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

Sunshine

January and December, with an average of 5.4h of sunshine, are months with the least sunshine.

UV index

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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.

What is the temperature in January in Grantsdale?

In Grantsdale, Montana, in January, the average high-temperature is 28.8°F (-1.8°C), and the average low-temperature is 16.2°F (-8.8°C).

What is the most humid month in Grantsdale?

With an average relative humidity of 89%, January is the most humid month in Grantsdale, Montana.

What is the average humidity in January in Grantsdale?

In Grantsdale, the average relative humidity in January is 89%.

How much does it rain in Grantsdale in January?

In Grantsdale, during January, the rain falls for 11.9 days and regularly aggregates up to 2.05" (52mm) of precipitation.

How many days does it snow in January in Grantsdale?

In Grantsdale, Montana, in January, during 18.6 snowfall days, 11.89" (302mm) of snow is typically accumulated.

What is the average length of the day in January in Grantsdale?

The average length of the day in January is 9.1h.

What is the month with the least sunshine in Grantsdale?

January and December, with an average of 5.4h of sunshine, are months with the least sunshine in Grantsdale, Montana.

How many hours of sunshine does Grantsdale have in January?

The average sunshine in January in Grantsdale is 5.4h.

How high is the UV index in January in Grantsdale?

In January, the average daily maximum UV index in Grantsdale, Montana, is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to the Sun's UV rays.
Average temperature in January - Grantsdale, MT
  • Average high temperature in January: 28.8°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).

  • Average low temperature in January: 16.2°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).

Average pressure in January - Grantsdale, MT
  • Average pressure in January: 30.21"

The month with the highest atmospheric pressure is January (30.21").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed in January - Grantsdale, MT
  • Average wind speed in January: 5.3mph

The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in January - Grantsdale, MT
  • Average humidity in January: 89%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).

Average rainfall in January - Grantsdale, MT
  • Average rainfall in January: 2.05"

The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").

Average rainfall days in January - Grantsdale, MT
  • Average rainfall days in January: 11.9 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).

Average snowfall in January - Grantsdale, MT
  • Average snowfall in January: 11.89"

The month with the highest snowfall is February (13.03").
Months with the least snowfall are June, July and August (0").

Average snowfall days in January - Grantsdale, MT
  • Average snowfall days in January: 18.6 days

The month with the highest number of snowfall days is February (19.3 days).
Months with the least snowfall days are June, July and August (0 days).

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

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in January: 5.4h

Months with the most sunshine are July and August (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.4).

Average sunshine days in January - Grantsdale, MT
  • Average sunshine days in January: 10.2 days

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).

Average UV index in January - Grantsdale, MT
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are February and December (UV index 1).

Average cloud cover in January - Grantsdale, MT
  • Average cloud cover in January: 48

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in January - Grantsdale, MT
  • Average visibility in January: 4mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March and December (4mi).