December weather forecastGreenbrier, IN
December
Weather in December
December, the first month of the winter in Greenbrier, is also a frosty month, with an average temperature fluctuating between 32.9°F (0.5°C) and 43.7°F (6.5°C).Temperature
The beginning of December involves a decrease in the average high-temperature, transitioning from a cool 53.4°F (11.9°C) in November to a chilly 43.7°F (6.5°C). During December, Greenbrier consistently records a temperature low averaging an icy 32.9°F (0.5°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In December, in Greenbrier, the rain falls for 11.5 days. Throughout December, 3.11" (79mm) of precipitation is accumulated. In Greenbrier, during the entire year, the rain falls for 172 days and collects up to 40.91" (1039mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Greenbrier, Indiana, during December, snow falls for 4.1 days and regularly aggregates up to 1.02" (26mm) of snow. Throughout the year, there are 21.1 snowfall days, and 6.26" (159mm) of snow is accumulated.Daylight
The month with the shortest days in Greenbrier is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:47 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:05 am and sunset at 4:39 pm CST.
Sunshine
January, February and December, with an average of 4.4h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index in Greenbrier are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the UV index of 2 transforms into the following advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Greenbrier, IN
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Greenbrier, IN
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Greenbrier, IN
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is February (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in December
Greenbrier, IN
- Average humidity in December: 79%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Greenbrier, IN
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is April (5.31").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Greenbrier, IN
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is January (9.9 days).
Average snowfall in December
Greenbrier, IN
- Average snowfall in December: 1.02"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Greenbrier, IN
- Average snowfall days in December: 4.1 days
The month with the highest number of snowfall days is January (6.5 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
Greenbrier, IN
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 24min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 24min).
Average sunshine days in December
Greenbrier, IN
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is July (8.9 days).
Average UV index in December
Greenbrier, IN
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Greenbrier, IN
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Greenbrier, 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).
