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
The shift from November to December involves a decrease in the average high-temperature, dropping from a fresh 54.5°F (12.5°C) to a frosty 43.7°F (6.5°C). Throughout December, Foster registers a consistent average low-temperature of 29.5°F (-1.4°C).Humidity
In December, the average relative humidity is 73%.Rainfall
In Foster, in December, it is raining for 5.5 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 130.6 rainfall days, and 25.43" (646mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, May, October through December. In Foster, in December, snow falls for 2 days, with typically accumulated 0.43" (11mm) of snow. In Foster, Missouri, during the entire year, snow falls for 12.2 days and aggregates up to 4.29" (109mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:16 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 5:08 pm CST.
Sunshine
In Foster, the average sunshine in December is 5.6h.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, the average maximum UV index of 2 translates into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. On your guard! Snow's reflection 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
How cold is it in December?
What is the average humidity in December?
How many days 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 Foster have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Foster, MO
- Average high temperature in December: 43.7°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 (39.9°F).
- Average low temperature in December: 29.5°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in December
Foster, MO
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Foster, MO
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is March (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Foster, MO
- Average humidity in December: 73%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Foster, MO
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in December
Foster, MO
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (5 days).
Average snowfall in December
Foster, MO
- Average snowfall in December: 0.43"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are April, June, July, August and September (0").
Average snowfall days in December
Foster, MO
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is February (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
Foster, MO
- Average daylight in December: 9h and 4min
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 36min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in December
Foster, MO
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is January (22.7 days).
The month with the least sunshine days is May (12.2 days).
Average UV index in December
Foster, 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
Foster, MO
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in December
Foster, 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).
Foster, Missouri, USA
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