December weather forecast
Idaho Springs, CO

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The emerald water of St. Mary
The emerald water of St. Mary's Lake circled by green pine trees and vast hill ranges in Idaho Springs, Colorado

Weather in December

The first month of the winter, December, is still a freezing cold month in Idaho Springs, Colorado, with an average temperature varying between 11.8°F (-11.2°C) and 29.3°F (-1.5°C).

Temperature

Idaho Springs reaches its lowest average temperatures in December, measuring 29.3°F (-1.5°C) at the peak and 11.8°F (-11.2°C) at the lowest.

Humidity

The average relative humidity in December is 72%.

Rainfall

December is the month with the least rainfall. Rain falls for 3 days and accumulates 0.28" (7mm) of precipitation.

Snowfall

January through December are months with snowfall. In December, it is snowing for 8.4 days. Throughout December, 2.36" (60mm) of snow is accumulated. Throughout the year, there are 74.9 snowfall days, and 35.39" (899mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Idaho Springs, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:04 am and sunset at 4:38 pm. On the last day of December, in Idaho Springs, sunrise is at 7:22 am and sunset at 4:47 pm MST.

Sunshine

The average sunshine in December is 6.5h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 2 during December leads to these instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. It's recommended to limit sun exposure when its radiation is at its peak during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

Idaho Springs experiences its average lowest temperatures in December, reaching a peak of 29.3°F (-1.5°C) and a minimum of 11.8°F (-11.2°C).

How cold is December in Idaho Springs?

In December, in Idaho Springs, the average high-temperature is 29.3°F (-1.5°C), and the average low-temperature is 11.8°F (-11.2°C).

What is the average humidity in December?

In Idaho Springs, the average relative humidity in December is 72%.

What is the driest month?

The month with the least rainfall is December, when the rain falls for 3 days and typically collects 0.28" (7mm) of precipitation.

How many days does it rain in December?

In Idaho Springs, in December, it is raining for 3 days, with typically 0.28" (7mm) of accumulated precipitation.

How much does it snow in December?

In Idaho Springs, in December, snow falls for 8.4 days, with typically accumulated 2.36" (60mm) of snow.

What is the month with the shortest days in Idaho Springs?

December has the shortest days of the year, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

In Idaho Springs, the average day length in December is 9h and 25min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:47 pm MST.

How long on average sun shines in December in Idaho Springs?

In Idaho Springs, Colorado, the average sunshine duration in December is 6.5h.

What are the months with the lowest UV index in Idaho Springs?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe 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
Idaho Springs, CO

Average temperature in December - Idaho Springs, CO
  • Average high temperature in December: 29.3°F

The warmest month (with the highest average high temperature) is July (72.3°F).
The month with the lowest average high temperature is December (29.3°F).

  • Average low temperature in December: 11.8°F

The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is February (11.3°F).

Average pressure in December
Idaho Springs, CO

Average pressure in December - Idaho Springs, CO
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is April (29.92"Hg).

Average wind speed in December
Idaho Springs, CO

Average wind speed in December - Idaho Springs, CO
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is January (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in December
Idaho Springs, CO

Average humidity in December - Idaho Springs, CO
  • Average humidity in December: 72%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is June (50%).

Average rainfall in December
Idaho Springs, CO

Average rainfall in December - Idaho Springs, CO
  • Average rainfall in December: 0.28"

The wettest month (with the highest rainfall) is July (1.65").
The driest month (with the least rainfall) is December (0.28").

Average rainfall days in December
Idaho Springs, CO

Average rainfall days in December - Idaho Springs, CO
  • Average rainfall days in December: 3 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (2.2 days).

Average snowfall in December
Idaho Springs, CO

Average snowfall in December - Idaho Springs, CO
  • Average snowfall in December: 2.36"

The month with the highest snowfall is March (6.73").
The months with the least snowfall are July and August (0.04").

Average snowfall days in December
Idaho Springs, CO

Average snowfall days in December - Idaho Springs, CO
  • Average snowfall days in December: 8.4 days

The month with the highest number of snowfall days is March (11.6 days).
The months with the least snowfall days are July and August (0.1 days).

Average daylight in December /
Average sunshine in December
Idaho Springs, CO

Average daylight in December / Average sunshine in December - Idaho Springs, CO
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 6h and 3min

The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).

Average sunshine days in December
Idaho Springs, CO

Average sunshine days in December - Idaho Springs, CO
  • Average sunshine days in December: 22.5 days

The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is July (9.8 days).

Average UV index in December
Idaho Springs, CO

Average UV index in December - Idaho Springs, CO
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in December
Idaho Springs, CO

Average cloud cover in December - Idaho Springs, CO
  • Average cloud cover in December: 31

The months with the most cloud cover are February, April and May (Cloud cover 35).
The month with the least cloud cover is June (Cloud cover 20).

Average visibility in December
Idaho Springs, CO

Average visibility in December - Idaho Springs, CO
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Idaho Springs, Colorado, USA

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