December weather forecastForistell, MO
December
Weather in December
The first month of the winter, December, is also a wintry month in Foristell, Missouri, with an average temperature varying between 41.7°F (5.4°C) and 29.1°F (-1.6°C).Temperature
December comes with a drop in the average high-temperature, falling from November's cool 52.7°F (11.5°C) to a wintry 41.7°F (5.4°C). During the nights in December, the temperature averages to a freezing cold 29.1°F (-1.6°C).Humidity
In December, the average relative humidity is 76%.Rainfall
In Foristell, during December, the rain falls for 7.2 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 145 rainfall days, and 30.04" (763mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Foristell, Missouri, in December, during 4.3 snowfall days, 1.65" (42mm) of snow is typically accumulated. In Foristell, during the entire year, snow falls for 20.1 days and aggregates up to 9.06" (230mm) 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 7:03 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:52 pm CST.
Sunshine
In Foristell, 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 estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Foristell, MO
- Average high temperature in December: 41.7°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 (37.4°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Foristell, 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
Foristell, MO
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Foristell, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Foristell, MO
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Foristell, MO
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in December
Foristell, MO
- Average snowfall in December: 1.65"
The month with the highest snowfall is January (2.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Foristell, MO
- Average snowfall days in December: 4.3 days
The month with the highest number of snowfall days is February (6.3 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
Foristell, 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Foristell, MO
- Average sunshine days in December: 19.5 days
The months with the most sunshine days are January, October and December (19.5 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in December
Foristell, MO
- Average UV index in December: 2
The months with the highest UV index are 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
Foristell, MO
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 29).
Average visibility in December
Foristell, MO
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
