December weather forecastZionsville, IN
December
Weather in December
December, the first month of the winter in Zionsville, is also an icy month, with an average temperature varying between 27.3°F (-2.6°C) and 37.8°F (3.2°C).Temperature
As Zionsville enters December, the average high-temperature decreases from the a frosty 48.7°F (9.3°C) of November to a wintry 37.8°F (3.2°C). Zionsville, in December, observes a steady average low-temperature of 27.3°F (-2.6°C).Humidity
The most humid month is December, with an average relative humidity of 83%.Rainfall
In December, in Zionsville, the rain falls for 6.5 days. Throughout December, 0.94" (24mm) of precipitation is accumulated. Throughout the year, there are 121.7 rainfall days, and 11.69" (297mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Zionsville, in December, snow falls for 5.7 days, with typically accumulated 1.02" (26mm) of snow. Throughout the year, there are 25.8 snowfall days, and 3.74" (95mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:48 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 5:30 pm EST.
Sunshine
The average sunshine in December is 4.1h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 1 during December translates into the following directions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Zionsville, IN
- Average high temperature in December: 37.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Zionsville, IN
- Average pressure in December: 30.12"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Zionsville, IN
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Zionsville, IN
- Average humidity in December: 83%
The month with the highest relative humidity is December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Zionsville, IN
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is May (1.46").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Zionsville, IN
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in December
Zionsville, IN
- Average snowfall in December: 1.02"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Zionsville, IN
- Average snowfall days in December: 5.7 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Zionsville, IN
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 6min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Zionsville, IN
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in December
Zionsville, IN
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Zionsville, IN
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Zionsville, IN
- 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).
