December weather forecast
Cascade, ID

Weather in December

December, the first month of the winter in Cascade, is still a freezing cold month, with an average temperature varying between 28°F (-2.2°C) and 15.1°F (-9.4°C).

Temperature

With an average high-temperature of 28°F (-2.2°C) and an average low-temperature of 15.1°F (-9.4°C), December is the coldest month.

Humidity

In December, the average relative humidity is 88%.

Rainfall

In December, in Cascade, the rain falls for 4.6 days. Throughout December, 2.91" (74mm) of precipitation is accumulated. Throughout the year, there are 98.1 rainfall days, and 22.64" (575mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Cascade are January through June, September through December. In Cascade, Idaho, snow falls for 16.3 days, with typically accumulated 21.1" (536mm) of snow. In Cascade, during the entire year, snow falls for 93.8 days and aggregates up to 104.45" (2653mm) of snow.

Daylight

With an average of 8h and 54min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 8:00 am and sunset at 5:05 pm. On the last day of December, sunrise is at 8:20 am and sunset at 5:14 pm MST.

Sunshine

In Cascade, the average sunshine in December is 4.5h.

UV index

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 in December transform into the following instructions:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Cascade?

December is the coldest month in Cascade, with an average high-temperature of 28°F (-2.2°C) and an average low-temperature of 15.1°F (-9.4°C).

What is the average humidity in December in Cascade?

The average relative humidity in December in Cascade is 88%.

How many days does it rain in December in Cascade?

In Cascade, Idaho, in December, it is raining for 4.6 days, with typically 2.91" (74mm) of accumulated precipitation.

How many days does it snow in December in Cascade?

In December, it is snowing for 16.3 days. Throughout December, 21.1" (536mm) of snow is accumulated.

What is the month with the shortest days in Cascade?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

How many hours of daylight does Cascade have in December?

The average day length in December in Cascade is 8h and 54min.

When is the sunrise / sunset in December in Cascade?

On the first day of December in Cascade, sunrise is at 8:00 am and sunset at 5:05 pm. On the last day of the month, sunrise is at 8:20 am and sunset at 5:14 pm MST.

How long on average sun shines in December in Cascade?

The average sunshine duration in December in Cascade is 4.5h.

What is the UV index reading in December in Cascade?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
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
Cascade, ID

Average temperature in December - Cascade, ID
  • Average high temperature in December: 28°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (28°F).

  • Average low temperature in December: 15.1°F

The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).

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Average pressure in December
Cascade, ID

Average pressure in December - Cascade, ID
  • Average pressure in December: 30.21"Hg

The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Cascade, ID

Average wind speed in December - Cascade, ID
  • Average wind speed in December: 4.5mph

The windiest months (with the highest average wind speed) are March and April (5.3mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).

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Average humidity in December
Cascade, ID

Average humidity in December - Cascade, ID
  • Average humidity in December: 88%

The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in December
Cascade, ID

Average rainfall in December - Cascade, ID
  • Average rainfall in December: 2.91"

The wettest month (with the highest rainfall) is March (3.31").
The driest month (with the least rainfall) is July (0.31").

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Average rainfall days in December
Cascade, ID

Average rainfall days in December - Cascade, ID
  • Average rainfall days in December: 4.6 days

The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (4.1 days).

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Average snowfall in December
Cascade, ID

Average snowfall in December - Cascade, ID
  • Average snowfall in December: 21.1"

The month with the highest snowfall is January (23.07").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Cascade, ID

Average snowfall days in December - Cascade, ID
  • Average snowfall days in December: 16.3 days

The month with the highest number of snowfall days is March (17 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Cascade, ID

Average daylight in December / Average sunshine in December - Cascade, ID
  • Average daylight in December: 8h and 54min

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

  • Average sunshine in December: 4h and 30min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days in December
Cascade, ID

Average sunshine days in December - Cascade, ID
  • Average sunshine days in December: 13.6 days

The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is March (10.1 days).

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Average UV index in December
Cascade, ID

Average UV index in December - Cascade, ID
  • Average UV index in December: 2

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

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Average cloud cover in December
Cascade, ID

Average cloud cover in December - Cascade, ID
  • Average cloud cover in December: 54

The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 10).

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Average visibility in December
Cascade, ID

Average visibility in December - Cascade, 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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