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
December, on average, is the coldest month in Granby, registering a high temperature of 24.6°F (-4.1°C) and a low of 5°F (-15°C).Humidity
In Granby, the average relative humidity in December is 83%.Rainfall
In Granby, during December, the rain falls for 7.4 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, there are 96.3 rainfall days, and 11.54" (293mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, August through December. In Granby, during December, snow falls for 13.4 days and regularly aggregates up to 5.12" (130mm) of snow. Throughout the year, in Granby, there are 110.7 snowfall days, and 59.88" (1521mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:07 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:48 pm MST.
Sunshine
In December, the average sunshine in Granby is 6.4h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. To protect against the Sun's most potent rays, avoid direct exposure around midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is December in Granby?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Granby have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Granby have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Granby, CO
- Average high temperature in December: 24.6°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 (24.6°F).
- Average low temperature in December: 5°F
The month with the highest average low temperature is July (43.7°F).
The coldest month (with the lowest average low temperature) is January (4.3°F).
Average pressure in December
Granby, CO
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.93"Hg).
Average wind speed in December
Granby, CO
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Granby, CO
- Average humidity in December: 83%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (49%).
Average rainfall in December
Granby, CO
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is August (0.55").
Average rainfall days in December
Granby, CO
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is October (4.9 days).
Average snowfall in December
Granby, CO
- Average snowfall in December: 5.12"
The month with the highest snowfall is April (10.94").
The month with the least snowfall is July (0").
Average snowfall days in December
Granby, CO
- Average snowfall days in December: 13.4 days
The month with the highest number of snowfall days is February (16.1 days).
The month with the least snowfall days is July (0 days).
Average daylight in December /
Average sunshine in December
Granby, CO
- Average daylight in December: 9h and 2min
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: 6h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in December
Granby, CO
- Average sunshine days in December: 16.8 days
The months with the most sunshine days are September and November (19.5 days).
The month with the least sunshine days is May (9.5 days).
Average UV index in December
Granby, 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
Granby, CO
- Average cloud cover in December: 36
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 15).
Average visibility in December
Granby, CO
- Average visibility in December: 5mi
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, March, April and December (5mi).
Granby, Colorado, USA
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