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 comes with a decrease in the average high-temperature, falling from a cold 39.4°F (4.1°C) in November to a subzero cold 27.7°F (-2.4°C). In Hayden, an average low-temperature of 10.8°F (-11.8°C) is recorded during December nights.Humidity
The average relative humidity in December is 83%.Rainfall
In Hayden, Colorado, in December, it is raining for 5.7 days, with typically 1.18" (30mm) of accumulated precipitation. Throughout the year, there are 96.4 rainfall days, and 13.11" (333mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In December, it is snowing for 14.7 days. Throughout December, 9.33" (237mm) of snow is accumulated. Throughout the year, there are 87.1 snowfall days, and 60.47" (1536mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:13 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:32 am and sunset at 4:52 pm MST.
Sunshine
The average sunshine in December is 6h.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 reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The UV index of 2 during December leads to these advisories:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Stay sun-safe with clothing that is both closely woven and worn loosely. 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
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Hayden have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index in Hayden?
What is the UV index reading in December in Hayden?
Average temperature in December
Hayden, CO
- Average high temperature in December: 27.7°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in December: 10.8°F
The month with the highest average low temperature is July (49.6°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in December
Hayden, CO
- Average pressure in December: 30.21"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is May (29.92"Hg).
Average wind speed in December
Hayden, CO
- Average wind speed in December: 5.4mph
The windiest months (with the highest average wind speed) are April and June (7.1mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).
Average humidity in December
Hayden, CO
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is August (45%).
Average rainfall in December
Hayden, CO
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is April (1.81").
The driest month (with the least rainfall) is August (0.55").
Average rainfall days in December
Hayden, CO
- Average rainfall days in December: 5.7 days
The months with the highest number of rainy days are April and May (12.3 days).
The month with the least rainy days is November (5 days).
Average snowfall in December
Hayden, CO
- Average snowfall in December: 9.33"
The month with the highest snowfall is January (11.34").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Hayden, CO
- Average snowfall days in December: 14.7 days
The month with the highest number of snowfall days is February (16.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Hayden, 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 18min).
- Average sunshine in December: 6h and 0min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in December
Hayden, CO
- Average sunshine days in December: 15.1 days
The month with the most sunshine days is June (19.6 days).
The month with the least sunshine days is April (10.2 days).
Average UV index in December
Hayden, CO
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Hayden, CO
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 44).
The months with the least cloud cover are June, August and September (Cloud cover 13).
Average visibility in December
Hayden, CO
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Hayden, Colorado, USA
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