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
In Westchester, the average high-temperature in December decreases from a chilly 48.4°F (9.1°C) in November to a wintry 37.6°F (3.1°C). In December, Westchester experiences a temperature dip to an average of 27.1°F (-2.7°C) at night.Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 83%.Rainfall
In Westchester, in December, during 5.8 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. Throughout the year, there are 108.6 rainfall days, and 8.74" (222mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Westchester, during December, snow falls for 6.5 days and regularly aggregates up to 0.71" (18mm) of snow. Throughout the year, there are 32.7 snowfall days, and 3.15" (80mm) 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 December, sunrise is at 7:44 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:23 pm EST.
Sunshine
In Westchester, the average sunshine in December is 3.8h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Opt for tightly woven and loose clothing to enhance protection from the Sun. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Westchester have in December?
When is the lowest UV index in Westchester?
How high is the UV index in December?
Average temperature in December
Westchester, IN
- Average high temperature in December: 37.6°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 (31.6°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Westchester, IN
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Westchester, IN
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Westchester, 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
Westchester, IN
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Westchester, IN
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is May (13.9 days).
The months with the least rainy days are January and February (4.8 days).
Average snowfall in December
Westchester, IN
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Westchester, IN
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8.8 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
Westchester, IN
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 3h and 5min
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 24min).
Average sunshine days in December
Westchester, IN
- Average sunshine days in December: 18.7 days
The months with the most sunshine days are October and November (19.7 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in December
Westchester, IN
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Westchester, IN
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Westchester, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
Westchester, Indiana, USA
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