December weather forecast
Post Falls, ID

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 December

The first month of the winter, December, is still a freezing cold month in Post Falls, Idaho, with an average temperature ranging between max 31.3°F (-0.4°C) and min 21.2°F (-6°C).

Temperature

December is the coldest month, with an average high-temperature of 31.3°F (-0.4°C) and an average low-temperature of 21.2°F (-6°C).

Humidity

The average relative humidity in December is 90%.

Rainfall

In December, the rain falls for 10.8 days. Throughout December, 3.15" (80mm) of precipitation is accumulated. In Post Falls, during the entire year, the rain falls for 141.2 days and collects up to 22.6" (574mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Post Falls, Idaho. In Post Falls, in December, snow falls for 16.9 days, with typically accumulated 13.66" (347mm) of snow. Throughout the year, there are 71.8 snowfall days, and 56.54" (1436mm) of snow is accumulated.

Daylight

The month with the shortest days in Post Falls is December, with an average of 8h and 29min of daylight.
On the first day of December, sunrise is at 7:15 am and sunset at 3:58 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:05 pm PST.

Sunshine

The month with the least sunshine in Post Falls, Idaho, is December, with an average of 3.4h of sunshine.

UV index

The months with the lowest UV index in Post Falls are February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 1 in December 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Post Falls?

With an average high-temperature of 31.3°F (-0.4°C) and an average low-temperature of 21.2°F (-6°C), December is the coldest month in Post Falls.

What is the temperature in December in Post Falls?

In Post Falls, Idaho, in December, the average high-temperature is 31.3°F (-0.4°C), and the average low-temperature is 21.2°F (-6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 82.4°F (28°C).

What is the average humidity in December in Post Falls?

In December, the average relative humidity in Post Falls, Idaho, is 90%.

How much does it rain in Post Falls in December?

In December, the rain falls for 10.8 days. Throughout December, 3.15" (80mm) of precipitation is accumulated.

How much does it snow in Post Falls in December?

In December, it is snowing for 16.9 days. Throughout December, 13.66" (347mm) of snow is accumulated.

What is the month with the shortest days in Post Falls?

The month with the shortest days in Post Falls is December, with an average of 8h and 29min of daylight.

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

In Post Falls, the average day length in December is 8h and 29min.

When is the sunrise / sunset in December in Post Falls?

On the first day of December in Post Falls, sunrise is at 7:15 am and sunset at 3:58 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:05 pm PST.

What is the month with the least sunshine in Post Falls?

With an average of 3.4h of sunshine, December has the least sunshine of the year in Post Falls, Idaho.

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

In December, the average sunshine duration in Post Falls, Idaho, is 3.4h.

What is the month with the lowest UV index in Post Falls?

February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December in Post Falls?

The average daily maximum UV index in December in Post Falls is 1. A UV Index estimate of 2, and below, represents a low health threat 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 December
Post Falls, ID

Average temperature in December - Post Falls, ID
  • Average high temperature in December: 31.3°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 December: 21.2°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).

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Average pressure in December
Post Falls, ID

Average pressure in December - Post Falls, ID
  • Average pressure in December: 30.17"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).

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Average wind speed in December
Post Falls, ID

Average wind speed in December - Post Falls, ID
  • Average wind speed in December: 3.9mph

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).

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Average humidity in December
Post Falls, ID

Average humidity in December - Post Falls, ID
  • Average humidity in December: 90%

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

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Average rainfall in December
Post Falls, ID

Average rainfall in December - Post Falls, ID
  • Average rainfall in December: 3.15"

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

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Average rainfall days in December
Post Falls, ID

Average rainfall days in December - Post Falls, ID
  • Average rainfall days in December: 10.8 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).

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Average snowfall in December
Post Falls, ID

Average snowfall in December - Post Falls, ID
  • Average snowfall in December: 13.66"

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

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Average snowfall days in December
Post Falls, ID

Average snowfall days in December - Post Falls, ID
  • Average snowfall days in December: 16.9 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).

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

Average daylight in December / Average sunshine in December - Post Falls, ID
  • Average daylight in December: 8h and 29min

The month with the longest days is June (Average daylight: 15h and 56min).
The month with the shortest days is December (Average daylight: 8h and 29min).

  • Average sunshine in December: 3h and 24min

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).

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Average sunshine days in December
Post Falls, ID

Average sunshine days in December - Post Falls, ID
  • Average sunshine days in December: 9.9 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).

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Average UV index in December
Post Falls, ID

Average UV index in December - Post Falls, ID
  • Average UV index in December: 1

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).

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Average cloud cover in December
Post Falls, ID

Average cloud cover in December - Post Falls, ID
  • Average cloud cover in December: 64

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

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Average visibility in December
Post Falls, ID

Average visibility in December - Post Falls, ID
  • Average visibility in December: 4mi

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

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