December weather forecastChesterfield, MO
December
Weather in December
Winter returns to Chesterfield in December, transforming the cityscape into a colder, quieter place. Snowfall makes a comeback after months of absence, with an average of 1.06" (27mm) falling. The chill in the air, combined with the festive décor adorning houses and shops, adds to the holiday spirit. Christmas preparations are in full swing with homes adorned with colorful lights and city streets bustled with shopping. Chesterfield, under the mystique of the winter night sky, glows with the joy and serenity of the holiday season, rounding off the year on a radiant note.Temperature
A change in temperatures is noted as November gives way to December, with average highs reducing from a cool 53.6°F (12°C) to a chilly 43°F (6.1°C). December nights are marked by an average low-temperature of 30°F (-1.1°C).Humidity
In December, the average relative humidity is 76%.Rainfall
In Chesterfield, in December, it is raining for 7.2 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, in Chesterfield, there are 139.6 rainfall days, and 26.1" (663mm) of precipitation is accumulated.Snowfall
Months with snowfall in Chesterfield are January through March, November and December. In Chesterfield, in December, during 3.5 snowfall days, 1.06" (27mm) of snow is typically accumulated. In Chesterfield, during the entire year, snow falls for 18.9 days and aggregates up to 4.92" (125mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:01 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:51 pm CST.
Sunshine
In Chesterfield, the average sunshine in December is 4.9h.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 low threat to health from unprotected exposure to Sun's UV rays for the average person.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. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Chesterfield, MO
- Average high temperature in December: 43°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in December
Chesterfield, MO
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Chesterfield, MO
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in December
Chesterfield, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Chesterfield, MO
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is February (1.3").
Average rainfall days in December
Chesterfield, MO
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in December
Chesterfield, MO
- Average snowfall in December: 1.06"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Chesterfield, MO
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (6.7 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
Chesterfield, MO
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Chesterfield, MO
- Average sunshine days in December: 20.2 days
The months with the most sunshine days are January and December (20.2 days).
The month with the least sunshine days is June (12 days).
Average UV index in December
Chesterfield, MO
- Average UV index in December: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Chesterfield, MO
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in December
Chesterfield, MO
- 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).
