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 average high-temperature decreases in December, shifting from a frosty 47.1°F (8.4°C) in November to a wintry 34.5°F (1.4°C). The average temperature during December nights dips to a subzero cold 22.8°F (-5.1°C).Humidity
The average relative humidity in December in Tracy, Iowa, is 79%.Rainfall
In Tracy, during December, the rain falls for 4.9 days and regularly aggregates up to 0.47" (12mm) of precipitation. In Tracy, Iowa, during the entire year, the rain falls for 109.6 days and collects up to 12.28" (312mm) of precipitation.Snowfall
Months with snowfall in Tracy are January through May, October through December. In Tracy, Iowa, in December, snow falls for 6.5 days, with typically accumulated 0.59" (15mm) of snow. Throughout the year, in Tracy, there are 29.7 snowfall days, and 5.16" (131mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Tracy.On the first day of the month, sunrise is at 7:18 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:37 am and sunset at 4:52 pm CST.
Sunshine
The average sunshine in December is 4.7h.UV index
In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Tracy?
What is the average humidity in December in Tracy?
How much does it rain in Tracy in December?
How many days does it snow in December in Tracy?
What is the month with the shortest days in Tracy?
What is the average length of the day in December in Tracy?
When are sunrise and sunset in December in Tracy?
How long on average sun shines in December in Tracy?
What is the UV index intensity in December in Tracy?
Average temperature in December
Tracy, IA
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in December: 22.8°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in December
Tracy, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Tracy, IA
- Average wind speed in December: 9.8mph
The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in December
Tracy, IA
- Average humidity in December: 79%
The months with the highest relative humidity are January, February, June and July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Tracy, IA
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (2.09").
The driest months (with the least rainfall) are January and February (0.43").
Average rainfall days in December
Tracy, IA
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Tracy, IA
- Average snowfall in December: 0.59"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Tracy, IA
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (7.9 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, IA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Tracy, IA
- Average sunshine days in December: 21.9 days
The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in December
Tracy, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Tracy, IA
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in December
Tracy, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Tracy, Iowa, USA
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