January weather forecast
Post Falls, ID

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Corbin Park on the banks of the Spokane River flowing downstream in Post Falls, Idaho, USA
Corbin Park on the banks of the Spokane River flowing downstream in Post Falls, Idaho, USA

Weather in January

January ushers in the coldest temperatures in Post Falls, Idaho, with the lowest average low of 21.6°F (-5.8°C). This month is known for its constant snowfall, clear nights showing off brilliant constellations, and shimmering icy landscapes under the crisp winter sun. Transitioning from December, January experiences a slight decrease in sunlight hours but maintains a relatively high humidity. Venturing outdoors might require layers of clothing to stay warm. As January progresses, residents longingly watch the gradually lengthening days in anticipation of spring's approach.

Temperature

Post Falls marks the start of January with an average high-temperature of a wintry 32.7°F (0.4°C), hinting at a slight fluctuation from December's 31.3°F (-0.4°C). Post Falls's average low-temperature in January is measured at a freezing cold 21.6°F (-5.8°C).

Humidity

With an average relative humidity of 93%, January is the most humid month.

Rainfall

The month with the most rainfall is January, when the rain falls for 11.5 days and typically aggregates up to 3.27" (83mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. January is the month with the most snowfall. Snow falls for 16.4 days and accumulates 16.57" (421mm) of snow.

Daylight

In Post Falls, the average length of the day in January is 8h and 56min.
On the first day of the month, sunrise is at 7:36 am and sunset at 4:06 pm. On the last day of January, sunrise is at 7:15 am and sunset at 4:46 pm PST.

Sunshine

The average sunshine in January is 3.5h.

UV index

In January, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In January, the maximum UV index of 2 suggests these recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in January?

The high-temperature, in January, in Post Falls, is 32.7°F (0.4°C), while the low-temperature averages to 21.6°F (-5.8°C).

What is the most humid month?

The most humid month is January, with an average relative humidity of 93%.

What is the average humidity in January?

The average relative humidity in January is 93%.

What is the rainiest month?

January is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.27" (83mm) of precipitation.

How many days does it rain in January?

In Post Falls, in January, during 11.5 rainfall days, 3.27" (83mm) of precipitation is typically accumulated.

What is the snowiest month?

January is the month with the most snowfall. Snow falls for 16.4 days and accumulates 16.57" (421mm) of snow.

How much does it snow in January?

In January, in Post Falls, Idaho, it is snowing for 16.4 days. Throughout January, 16.57" (421mm) of snow is accumulated.

How many hours of daylight does Post Falls have in January?

The average day length in January is 8h and 56min.

What time are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 7:36 am and sunset at 4:06 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:46 pm PST.

How many hours of sunshine does Post Falls have in January?

In Post Falls, the average sunshine duration in January is 3.5h.

What is the UV index reading in January?

In Post Falls, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
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
Post Falls, ID

Average temperature in January - Post Falls, ID
  • Average high temperature in January: 32.7°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (31.3°F).

  • Average low temperature in January: 21.6°F

The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (21.2°F).

Average pressure in January
Post Falls, ID

Average pressure in January - Post Falls, ID
  • 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 August (29.91"Hg).

Average wind speed in January
Post Falls, ID

Average wind speed in January - Post Falls, ID
  • Average wind speed in January: 4mph

The windiest month (with the highest average wind speed) is April (5mph).
The calmest month (with the lowest average wind speed) is December (3.9mph).

Average humidity in January
Post Falls, ID

Average humidity in January - Post Falls, ID
  • Average humidity in January: 93%

The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (48%).

Average rainfall in January
Post Falls, ID

Average rainfall in January - Post Falls, ID
  • Average rainfall in January: 3.27"

The wettest month (with the highest rainfall) is January (3.27").
The driest months (with the least rainfall) are July and August (0.43").

Average rainfall days in January
Post Falls, ID

Average rainfall days in January - Post Falls, ID
  • Average rainfall days in January: 11.5 days

The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (5.6 days).

Average snowfall in January
Post Falls, ID

Average snowfall in January - Post Falls, ID
  • Average snowfall in January: 16.57"

The month with the highest snowfall is January (16.57").
The months with the least snowfall are June, July and August (0").

Average snowfall days in January
Post Falls, ID

Average snowfall days in January - Post Falls, ID
  • Average snowfall days in January: 16.4 days

The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in January /
Average sunshine in January
Post Falls, ID

Average daylight in January / Average sunshine in January - Post Falls, ID
  • Average daylight in January: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in January: 3h and 3min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).

Average sunshine days in January
Post Falls, ID

Average sunshine days in January - Post Falls, ID
  • Average sunshine days in January: 11 days

The month with the most sunshine days is July (23.9 days).
The month with the least sunshine days is February (8.6 days).

Average UV index in January
Post Falls, ID

Average UV index in January - Post Falls, ID
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).

Average cloud cover in January
Post Falls, ID

Average cloud cover in January - Post Falls, ID
  • Average cloud cover in January: 65

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in January
Post Falls, ID

Average visibility in January - Post Falls, ID
  • Average visibility in January: 3mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).

Post Falls, Idaho, USA

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