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
Onset of December witnesses a reduction in the average high-temperature, falling from a fresh 52°F (11.1°C) in November to an icy 40.1°F (4.5°C). An average low-temperature of 26.8°F (-2.9°C) is observed during December nights.Humidity
The average relative humidity in December is 75%.Rainfall
In Tracy, during December, the rain falls for 5.5 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, there are 134.1 rainfall days, and 26.5" (673mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Tracy, in December, snow falls for 3.8 days, with typically accumulated 1.22" (31mm) of snow. In Tracy, during the entire year, snow falls for 21.8 days and aggregates up to 9.65" (245mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of December in Tracy, sunrise is at 7:20 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:06 pm CST.
Sunshine
In Tracy, the average sunshine in December is 5.4h.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 value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 2 in December transforms into this advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Boost your sun resistance with garments that are densely woven yet spacious. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Tracy have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Tracy, MO
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in December
Tracy, MO
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Tracy, MO
- Average wind speed in December: 9.3mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Tracy, MO
- Average humidity in December: 75%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are October and November (70%).
Average rainfall in December
Tracy, MO
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Tracy, MO
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in December
Tracy, MO
- Average snowfall in December: 1.22"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Tracy, MO
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Tracy, MO
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in December
Tracy, MO
- Average sunshine days in December: 21.8 days
The month with the most sunshine days is December (21.8 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Tracy, 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
Tracy, MO
- Average cloud cover in December: 41
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
Tracy, 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).
Tracy, Missouri, USA
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