December weather forecastFlorissant, MO
December
Weather in December
December marks the full swing of winter in Florissant. As the last month of the year, it sees an increase in snowfall to 2.01" (51mm), serving as a quintessential sign of the approach of the holiday season. Despite the increased snowfall and chill, the Christmas spirit fills the air. The residents of Florissant welcome the snow for the added charm it brings to the holiday season.Temperature
The arrival of December indicates a decrease in the average high-temperature, moving from a cool 52.9°F (11.6°C) in November to a cold 41.9°F (5.5°C). In December, the temperature drops to an average of 30°F (-1.1°C) at night.Humidity
The average relative humidity in December is 76%.Rainfall
In Florissant, in December, it is raining for 8.2 days, with typically 2.05" (52mm) of accumulated precipitation. In Florissant, during the entire year, the rain falls for 149 days and collects up to 31.61" (803mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Florissant, in December, during 3.7 snowfall days, 2.01" (51mm) of snow is typically accumulated. In Florissant, Missouri, during the entire year, snow falls for 19.5 days and aggregates up to 8.82" (224mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:49 pm CST.
Sunshine
In December, the average sunshine is 4.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Florissant, MO
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in December
Florissant, 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
Florissant, MO
- Average wind speed in December: 8.7mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity in December
Florissant, 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 (70%).
Average rainfall in December
Florissant, MO
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is February (1.69").
Average rainfall days in December
Florissant, MO
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Florissant, MO
- Average snowfall in December: 2.01"
The month with the highest snowfall is February (2.95").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Florissant, MO
- Average snowfall days in December: 3.7 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
Florissant, 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 months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Florissant, MO
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Florissant, MO
- Average UV index in December: 2
The months with the highest UV index are May, 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
Florissant, MO
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Florissant, 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).
