December weather forecastBroomfield, CO
December
Weather in December
December marks the full arrival of winter in Broomfield. Hitting the lowest maximum temperature for the year at 39.4°F (4.1°C), December greets residents with a cold and windy climate. Fittingly, it is a month where snowfall valiantly battles with rainfall. A fall in daylight hours to a yearly low of 9.4 hours and a drop in pressure to 30.12in signal the year's end. Contrarily, Broomfield remains bright with sunshine peeking on 22.5 days, creating a picturesque winter paradise.Temperature
With its high average temperature of 39.4°F (4.1°C) and a low of 20.7°F (-6.3°C), December is regarded as the coldest month.Humidity
In December, the average relative humidity is 62%.Rainfall
In Broomfield, in December, during 5 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. Throughout the year, there are 96.7 rainfall days, and 5.63" (143mm) of precipitation is accumulated.Snowfall
Months with snowfall in Broomfield are January through May, October through December. In Broomfield, in December, during 5.6 snowfall days, 1.34" (34mm) of snow is typically accumulated. Throughout the year, there are 36.7 snowfall days, and 13.98" (355mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:45 pm MST.
Sunshine
In Broomfield, the average sunshine in December is 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 reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Broomfield, CO
- Average high temperature in December: 39.4°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (39.4°F).
- Average low temperature in December: 20.7°F
The month with the highest average low temperature is July (59°F).
The coldest months (with the lowest average low temperature) are February and December (20.7°F).
Average pressure in December
Broomfield, CO
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in December
Broomfield, CO
- Average wind speed in December: 6mph
The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest month (with the lowest average wind speed) is September (5.6mph).
Average humidity in December
Broomfield, CO
- Average humidity in December: 62%
The month with the highest relative humidity is February (67%).
The month with the lowest relative humidity is August (41%).
Average rainfall in December
Broomfield, CO
- Average rainfall in December: 0.2"
The wettest months (with the highest rainfall) are May and July (0.87").
The driest month (with the least rainfall) is January (0.16").
Average rainfall days in December
Broomfield, CO
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is November (3.5 days).
Average snowfall in December
Broomfield, CO
- Average snowfall in December: 1.34"
The month with the highest snowfall is February (2.68").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Broomfield, CO
- Average snowfall days in December: 5.6 days
The month with the highest number of snowfall days is February (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Broomfield, 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: 7h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in December
Broomfield, CO
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is November (23.7 days).
The month with the least sunshine days is July (10 days).
Average UV index in December
Broomfield, CO
- Average UV index in December: 2
The months with the highest UV index are 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
Broomfield, CO
- Average cloud cover in December: 22
The months with the most cloud cover are April and May (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 15).
Average visibility in December
Broomfield, 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).
