December weather forecastBrookville, IN
December
Weather in December
The first month of the winter, December, is also an icy month in Brookville, Indiana, with temperature in the range of an average low of 29.1°F (-1.6°C) and an average high of 40.1°F (4.5°C).Temperature
December ushers in a slight temperature change, with average high-temperatures reducing from November's cool 50.4°F (10.2°C) to a cold 40.1°F (4.5°C). Brookville's nights in December experience an average temperature drop to a subzero cold 29.1°F (-1.6°C).Humidity
The months with the highest humidity are January, May, July and December, with an average relative humidity of 82%.Rainfall
In Brookville, during December, the rain falls for 10.6 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Brookville, during the entire year, the rain falls for 153.9 days and collects up to 25.47" (647mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 7.8 days. Throughout December, 1.65" (42mm) of snow is accumulated. Throughout the year, there are 34 snowfall days, and 8.19" (208mm) 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 the month, sunrise is at 7:41 am and sunset at 5:16 pm. On the last day of December, sunrise is at 8:00 am and sunset at 5:26 pm EST.
Sunshine
In December, the average sunshine 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 of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Brookville, IN
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Brookville, IN
- Average pressure in December: 30.12"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Brookville, IN
- Average wind speed in December: 8.9mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Brookville, IN
- Average humidity in December: 82%
The months with the highest relative humidity are January, May, July and December (82%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Brookville, IN
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is May (3.27").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in December
Brookville, IN
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is February (8 days).
Average snowfall in December
Brookville, IN
- Average snowfall in December: 1.65"
The month with the highest snowfall is March (1.89").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Brookville, IN
- Average snowfall days in December: 7.8 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
Brookville, IN
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 4h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Brookville, IN
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is May (10.5 days).
Average UV index in December
Brookville, IN
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Brookville, 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 29).
Average visibility in December
Brookville, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
