Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Grand Junction's transition into December involves a shift in temperature, receding from a frosty 49.1°F (9.5°C) in November to a cold 36.3°F (2.4°C). An average low-temperature of 20.5°F (-6.4°C) is noted during the month of December.Humidity
In December, the average relative humidity is 69%.Rainfall
In December, in Grand Junction, the rain falls for 7.5 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. Throughout the year, in Grand Junction, there are 93.6 rainfall days, and 8.46" (215mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. The month with the most snowfall in Grand Junction is December, when snow falls for 6.9 days and typically aggregates up to 3.74" (95mm) of snow.Daylight
December has the shortest days of the year in Grand Junction, Colorado, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:14 am and sunset at 4:52 pm. On the last day of December, in Grand Junction, sunrise is at 7:33 am and sunset at 5:01 pm MST.
Sunshine
The average sunshine in December is 6.7h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
How cold is it in Grand Junction in December?
What is the average humidity in December in Grand Junction?
How much does it rain in Grand Junction in December?
When does it snow the most in Grand Junction?
How many days does it snow in December in Grand Junction?
What is the month with the shortest days in Grand Junction?
How many hours of daylight does Grand Junction have in December?
When are sunrise and sunset in December in Grand Junction?
How long on average sun shines in December in Grand Junction?
What are the months with the lowest UV index in Grand Junction?
What is the UV index intensity in December in Grand Junction?
Average temperature in December
Grand Junction, CO
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Grand Junction, CO
- Average pressure in December: 30.19"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The months with the lowest atmospheric pressure are May and June (29.9"Hg).
Average wind speed in December
Grand Junction, CO
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in December
Grand Junction, CO
- Average humidity in December: 69%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is June (29%).
Average rainfall in December
Grand Junction, CO
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is March (1.06").
The driest month (with the least rainfall) is June (0.51").
Average rainfall days in December
Grand Junction, CO
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is March (10.4 days).
The month with the least rainy days is November (5.5 days).
Average snowfall in December
Grand Junction, CO
- Average snowfall in December: 3.74"
The month with the highest snowfall is December (3.74").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Grand Junction, CO
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grand Junction, CO
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 6h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 18min).
Average sunshine days in December
Grand Junction, CO
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is February (15.8 days).
Average UV index in December
Grand Junction, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Grand Junction, CO
- Average cloud cover in December: 28
The month with the most cloud cover is January (Cloud cover 31).
The months with the least cloud cover are June and September (Cloud cover 11).
Average visibility in December
Grand Junction, CO
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Grand Junction, Colorado, USA
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