January weather forecast
Idaho, USA

January is the heart of winter in Idaho, and it often stands out as one of the coldest months of the year. The state's diverse topography means weather conditions can vary considerably across regions. The highlands, such as the areas around Borah Peak and the Sawtooth Range, are blanketed in snow, with temperatures frequently dipping to below freezing. In fact, Island Park Dam holds the record for Idaho's lowest ever recorded temperature of -60°F (-51.1°C) on January 18, 1943.

Cities in the western and northern parts, influenced by the maritime effect of the Pacific Ocean, experience chilly temperatures paired with a higher probability of precipitation. Conversely, eastern cities, away from the ocean's influence, can be drier but equally cold. The capital city, Boise, typically has temperatures ranging from the low to mid-20s°F in January, making it slightly milder compared to the colder highlands.

When juxtaposed with December, January's temperatures remain relatively consistent, but there's often a slight uptick in snowfall, especially in mountainous areas. Comparatively, February, while still cold, tends to show the initial signs of transition towards spring, with marginally warmer temperatures and reduced snowfall in many areas.

During January, fog becomes a recurring phenomenon in various regions, especially in the early morning hours, impacting visibility significantly. This fog can be particularly dense in areas near major rivers such as the Snake and Clearwater, resulting in picturesque, frosty landscapes. Overall, January in Idaho is emblematic of a classic winter month, complete with snowy terrains and brisk temperatures.

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• Boise - January »
  In Boise in January, snow falls for 8.2 days, with typically accumulated 6.54" (166mm) of snow. In Boise, during January, snow falls for 8.2 days and regularly aggregates up to 6.54" (166mm) of snow.
• Meridian - January »
  In Meridian, in January, snow falls for 6.8 days, with typically accumulated 4.21" (107mm) of snow. In Meridian, Idaho, during January, the rain falls for 11.1 days and regularly aggregates up to 1.65" (42mm) of precipitation.
• Nampa - January »
  The months with the least sunshine in Nampa, Idaho, are January and December, with an average of 5.8h of sunshine. In Nampa, during January, snow falls for 6.1 days and regularly aggregates up to 3.23" (82mm) of snow.
• Idaho Falls - January »
  In Idaho Falls, in January, snow falls for 12.8 days, with typically accumulated 3.86" (98mm) of snow. With an average relative humidity of 90%, January is the most humid month in Idaho Falls, Idaho.
• Pocatello - January »
  In Pocatello, in January, during 15.6 snowfall days, 8.27" (210mm) of snow is typically accumulated. The most humid month in Pocatello is January, with an average relative humidity of 85%.
• Caldwell - January »
  In Caldwell in January, snow falls for 5.6 days, with typically accumulated 2.8" (71mm) of snow. In Caldwell in January, during 9.8 rainfall days, 1.3" (33mm) of precipitation is typically accumulated.
• Coeur d'Alene - January »
  The month with the most rainfall in Coeur d'Alene is January, when the rain falls for 11.5 days and typically aggregates up to 3.27" (83mm) of precipitation. The month with the most rainfall in Coeur d'Alene is January, when the rain falls for 11.5 days and typically aggregates up to 3.27" (83mm) of precipitation.
• Twin Falls - January »
  In Twin Falls, Idaho, in January, during 7.8 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Twin Falls in January, during 7.8 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.
• Lewiston - January »
  In Lewiston in January, during 4.8 snowfall days, 2.56" (65mm) of snow is typically accumulated. In Lewiston in January, it is raining for 14.5 days, with typically 1.69" (43mm) of accumulated precipitation.
• Post Falls - January »
  The month with the most rainfall in Post Falls is January, when the rain falls for 11.5 days and typically aggregates up to 3.27" (83mm) of precipitation. The month with the most snowfall in Post Falls is January, when snow falls for 16.4 days and typically aggregates up to 16.57" (421mm) of snow.
• Rexburg - January »
  The month with the most snowfall in Rexburg is January, when snow falls for 18.1 days and typically aggregates up to 8.9" (226mm) of snow. In Rexburg, Idaho, during January, snow falls for 18.1 days and regularly aggregates up to 8.9" (226mm) of snow.
• Moscow - January »
  The month with the most snowfall in Moscow is January, when snow falls for 13.7 days and typically aggregates up to 12.56" (319mm) of snow. In Moscow, in January, during 13.7 snowfall days, 12.56" (319mm) of snow is typically accumulated.