December weather forecastGrand Lake, CO
December
Weather in December
December, the first month of the winter in Grand Lake, is also a subzero cold month, with an average temperature ranging between min 3.6°F (-15.8°C) and max 23.4°F (-4.8°C).Temperature
Grand Lake witnesses the coldest weather in December, with temperatures averaging a high of 23.4°F (-4.8°C) and a low of 3.6°F (-15.8°C).Humidity
In Grand Lake, the average relative humidity in December is 85%.Rainfall
The months with the least rainfall are September, November and December Rain falls for 4.8 days and accumulates 0.39" (10mm) of rain.Snowfall
January through June, September through December are months with snowfall. In December, it is snowing for 12 days. Throughout December, 3.11" (79mm) of snow is accumulated. In Grand Lake, during the entire year, snow falls for 90.8 days and aggregates up to 39.13" (994mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:47 pm MST.
Sunshine
The average sunshine in December is 5.9h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: An average UV index of 1 in December transforms into this advice:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Grand Lake, CO
- Average high temperature in December: 23.4°F
The warmest month (with the highest average high temperature) is July (72.1°F).
The month with the lowest average high temperature is December (23.4°F).
- Average low temperature in December: 3.6°F
The month with the highest average low temperature is July (42.6°F).
The coldest month (with the lowest average low temperature) is January (2.5°F).
Average pressure in December
Grand Lake, CO
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.93"Hg).
Average wind speed in December
Grand Lake, CO
- Average wind speed in December: 5.9mph
The windiest month (with the highest average wind speed) is June (7mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).
Average humidity in December
Grand Lake, CO
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is June (49%).
Average rainfall in December
Grand Lake, CO
- Average rainfall in December: 0.39"
The wettest month (with the highest rainfall) is July (1.06").
The driest months (with the least rainfall) are September, November and December (0.39").
Average rainfall days in December
Grand Lake, CO
- Average rainfall days in December: 4.8 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (3.3 days).
Average snowfall in December
Grand Lake, CO
- Average snowfall in December: 3.11"
The month with the highest snowfall is April (6.81").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Grand Lake, CO
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is February (13.8 days).
The months with the least snowfall days are July and August (0.1 days).
Average daylight in December /
Average sunshine in December
Grand Lake, CO
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 54min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in December
Grand Lake, CO
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is July (13.1 days).
Average UV index in December
Grand Lake, CO
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Grand Lake, CO
- Average cloud cover in December: 42
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 15).
Average visibility in December
Grand Lake, CO
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
