December weather forecastKeystone Manor, IN
December
Weather in December
December, the first month of the winter in Keystone Manor, is still a cold month, with an average temperature ranging between min 28.2°F (-2.1°C) and max 38.3°F (3.5°C).Temperature
Keystone Manor's weather changes with the onset of December, slightly falling from a chilly 49.3°F (9.6°C) in November to a wintry 38.3°F (3.5°C). Keystone Manor observes an average low-temperature of 28.2°F (-2.1°C) during December nights.Humidity
With an average relative humidity of 82%, December is the most humid month.Rainfall
In Keystone Manor, in December, during 8.9 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 146.4 rainfall days, and 21.14" (537mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. The month with the most snowfall is December, when snow falls for 6.2 days and typically aggregates up to 2.28" (58mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:47 am and sunset at 5:21 pm. On the last day of December, sunrise is at 8:06 am and sunset at 5:30 pm EST.
Sunshine
In December, the average sunshine is 4.2h.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Keystone Manor. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. On your guard! Snow's reflection can almost 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
Keystone Manor, IN
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in December
Keystone Manor, 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
Keystone Manor, IN
- Average wind speed in December: 9mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Keystone Manor, IN
- Average humidity in December: 82%
The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Keystone Manor, IN
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in December
Keystone Manor, IN
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in December
Keystone Manor, IN
- Average snowfall in December: 2.28"
The month with the highest snowfall is December (2.28").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Keystone Manor, IN
- Average snowfall days in December: 6.2 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Keystone Manor, 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 12min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Keystone Manor, IN
- Average sunshine days in December: 17 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in December
Keystone Manor, 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, October, November and December (UV index 2).
Average cloud cover in December
Keystone Manor, IN
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Keystone Manor, 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).
