January weather forecast and climate
Hamilton, MT

A strong suspension bridge over a fast river in Hamilton, Montana, overlooking scenic trees and hilly landscapes over the other side of the shore
A strong suspension bridge over a fast river in Hamilton, Montana, overlooking scenic trees and hilly landscapes over the other side of the shore
January, like December, is a freezing cold winter month in Hamilton, Montana, with average temperature varying between 28.8°F (-1.8°C) and 16.2°F (-8.8°C).

Temperature

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

Humidity

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

Rainfall

In Hamilton, Montana, in January, during 11.9 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, in Hamilton, there are 163.6 rainfall days, and 20.83" (529mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In Hamilton, Montana, during January, snow falls for 18.6 days and regularly aggregates up to 11.89" (302mm) of snow. Throughout the year, in Hamilton, Montana, there are 101.1 snowfall days, and 59.17" (1503mm) of snow is accumulated.

Daylight

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

Sunshine

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

UV index

The average daily maximum UV index in Hamilton, Montana, is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for the average 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Hamilton?

In Hamilton, 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 Hamilton?

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

What is the average humidity in January in Hamilton?

The average relative humidity in January in Hamilton is 89%.

How many days does it rain in January in Hamilton?

In January, in Hamilton, the rain falls for 11.9 days. Throughout January, 2.05" (52mm) of precipitation is accumulated.

How much does it snow in Hamilton in January?

In Hamilton, in January, snow falls for 18.6 days, with typically accumulated 11.89" (302mm) of snow.

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

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

What is the month with the least sunshine in Hamilton?

Months with the least sunshine in Hamilton are January and December, with an average of 5.4h of sunshine.

How long on average sun shines in January in Hamilton?

In Hamilton, Montana, the average sunshine in January is 5.4h.

How high is the UV index in January in Hamilton?

In Hamilton, Montana, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in January - Hamilton, MT
  • Average high temperature in January: -1.8°C

The warmest month (with the highest average high temperature) is July (25°C).
The month with the lowest average high temperature is December (-2.9°C).

  • Average low temperature in January: -8.8°C

The month with the highest average low temperature is August (8.3°C).
The coldest month (with the lowest average low temperature) is December (-10°C).

Average pressure in January - Hamilton, MT
  • Average pressure in January: 1023mbar

The month with the highest atmospheric pressure is January (1023mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in January - Hamilton, MT
  • Average wind speed in January: 8.6km/h

The windiest month (with the highest average wind speed) is January (8.6km/h).
The calmest month (with the lowest average wind speed) is August (6.6km/h).

Average humidity in January - Hamilton, 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 - Hamilton, MT
  • Average rainfall in January: 52mm

The wettest months (with the highest rainfall) are February and April (60mm).
The driest month (with the least rainfall) is August (19mm).

Average rainfall days in January - Hamilton, 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 - Hamilton, MT
  • Average snowfall in January: 302mm

The month with the highest snowfall is February (331mm).
Months with the least snowfall are June, July and August (0mm).

Average snowfall days in January - Hamilton, 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 - Hamilton, 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 - Hamilton, 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 - Hamilton, 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 visibility in January - Hamilton, MT
  • Average visibility in January: 7km

Months with the highest visibility are July and August (10km).
Months with the lowest visibility are January, February, March and December (7km).