December weather forecastKnox, IN
December
Weather in December
December, the first month of the winter in Knox, is also a wintry month, with an average temperature ranging between min 26.8°F (-2.9°C) and max 36°F (2.2°C).Temperature
December shows a mild decline in the average high-temperature, falling from November's frosty 47.1°F (8.4°C) to an icy 36°F (2.2°C). Knox's average low-temperature for the month of December records at a freezing cold 26.8°F (-2.9°C).Humidity
In December, the average relative humidity in Knox is 82%.Rainfall
In Knox, during December, the rain falls for 10.3 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, in Knox, there are 175.4 rainfall days, and 34.29" (871mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Knox, during December, snow falls for 10.4 days and regularly aggregates up to 3.07" (78mm) of snow. Throughout the year, in Knox, there are 51.1 snowfall days, and 17.68" (449mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December in Knox, sunrise is at 6:53 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:27 pm CST.
Sunshine
In Knox, the average sunshine in December is 3.9h.UV index
December is the month with the lowest UV index in Knox, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 1 in December translates into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Knox, IN
- Average high temperature in December: 36°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Knox, IN
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Knox, IN
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Knox, IN
- Average humidity in December: 82%
The months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Knox, IN
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in December
Knox, IN
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
Knox, IN
- Average snowfall in December: 3.07"
The month with the highest snowfall is February (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Knox, IN
- Average snowfall days in December: 10.4 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Knox, IN
- Average daylight in December: 9h and 18min
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: 3h and 54min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Knox, IN
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is November (14.6 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in December
Knox, IN
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Knox, IN
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Knox, IN
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
