December weather forecastWestlawn, IN
December
Weather in December
Come December, Westlawn, Indiana, embraces winter with the average high temperature dropping to 36.5°F (2.5°C). As the coldest month, more than warm coats and gloves become necessary to combat the chill. The festive atmosphere of the holiday season, though, seems to blend perfectly with the crisp weather, providing a picture-perfect backdrop for the twinkling Christmas lights. The likelihood of snowfall events increases significantly as the temperature decreases. The combination of winter's chill with the festive spirit wraps up the year on a climatically and emotionally high note.Temperature
In Westlawn, the average high-temperature in December decreases from a chilly 47.5°F (8.6°C) in November to an icy 36.5°F (2.5°C). During December nights, Westlawn records an average temperature of 27°F (-2.8°C).Humidity
January, February and December, with an average relative humidity of 83%, are the most humid months.Rainfall
In Westlawn, in December, during 7.7 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, there are 128.5 rainfall days, and 15" (381mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Westlawn, in December, during 6.8 snowfall days, 0.87" (22mm) of snow is typically accumulated. Throughout the year, in Westlawn, there are 32.5 snowfall days, and 6.42" (163mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:47 am and sunset at 5:13 pm. On the last day of December, sunrise is at 8:05 am and sunset at 5:22 pm EST.
Sunshine
In Westlawn, the average sunshine in December is 3.7h.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 average person.Note: In December, the maximum UV index of 1 suggests this advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Westlawn, IN
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in December
Westlawn, 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
Westlawn, IN
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Westlawn, IN
- Average humidity in December: 83%
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Westlawn, IN
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is May (1.89").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in December
Westlawn, IN
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Westlawn, IN
- Average snowfall in December: 0.87"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Westlawn, IN
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is January (9.5 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
Westlawn, 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 42min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in December
Westlawn, IN
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (12.5 days).
Average UV index in December
Westlawn, 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
Westlawn, IN
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Westlawn, 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).
