December weather forecastForest Park, IN
December
Weather in December
The first month of the winter, December, is also an icy month in Forest Park, Indiana, with an average temperature fluctuating between 40.6°F (4.8°C) and 29.7°F (-1.3°C).Temperature
In the transition to December, Forest Park observes a drop in the average high-temperature, moving from a fresh 51.1°F (10.6°C) in November to a cold 40.6°F (4.8°C). Forest Park throughout December, experiences an average nighttime temperature of 29.7°F (-1.3°C).Humidity
The months with the highest humidity are January, February, July and December, with an average relative humidity of 81%.Rainfall
In Forest Park, in December, it is raining for 11.7 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, in Forest Park, there are 163.5 rainfall days, and 29.29" (744mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 8.2 days. Throughout December, 1.89" (48mm) of snow is accumulated. Throughout the year, there are 34.1 snowfall days, and 8.54" (217mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:44 am and sunset at 5:21 pm. On the last day of December, sunrise is at 8:03 am and sunset at 5:30 pm EST.
Sunshine
The average sunshine in December is 4.3h.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 of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Forest Park, IN
- Average high temperature in December: 40.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 29.7°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 (22.5°F).
Average pressure in December
Forest Park, IN
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Forest Park, IN
- Average wind speed in December: 8.2mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
Forest Park, IN
- Average humidity in December: 81%
The months with the highest relative humidity are January, February, July and December (81%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Forest Park, IN
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Forest Park, IN
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (9.4 days).
Average snowfall in December
Forest Park, IN
- Average snowfall in December: 1.89"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Forest Park, IN
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Forest Park, IN
- Average daylight in December: 9h and 30min
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 30min).
- Average sunshine in December: 4h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Forest Park, IN
- Average sunshine days in December: 13.6 days
The month with the most sunshine days is October (17.7 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in December
Forest Park, IN
- Average UV index in December: 2
The months with the highest UV index are 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
Forest Park, IN
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Forest Park, IN
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are July and December (5mi).
