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
December's arrival comes with a decrease in the average high-temperature, moving from a chilly 49.1°F (9.5°C) in November to an icy 37.6°F (3.1°C). Hillsboro records a mean low-temperature of 27.5°F (-2.5°C) in December.Humidity
In December, the average relative humidity is 81%.Rainfall
In Hillsboro, Indiana, during December, the rain falls for 8.2 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, there are 142.3 rainfall days, and 21.93" (557mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Hillsboro, during December, snow falls for 6.5 days and regularly aggregates up to 1.69" (43mm) of snow. In Hillsboro, during the entire year, snow falls for 30.7 days and aggregates up to 7.91" (201mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:52 am and sunset at 5:23 pm. On the last day of December, sunrise is at 8:10 am and sunset at 5:33 pm EST.
Sunshine
In December, the average sunshine is 4.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December in Hillsboro?
How many hours of sunshine does Hillsboro have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Hillsboro, IN
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Hillsboro, 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
Hillsboro, IN
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Hillsboro, IN
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Hillsboro, IN
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in December
Hillsboro, IN
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in December
Hillsboro, IN
- Average snowfall in December: 1.69"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Hillsboro, IN
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (9.3 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
Hillsboro, 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 24min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Hillsboro, IN
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Hillsboro, IN
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Hillsboro, IN
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in December
Hillsboro, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Hillsboro, Indiana, USA
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