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
The onset of December comes with a shift in the average high-temperature, falling from a frosty 48.4°F (9.1°C) in November to an icy 37.6°F (3.1°C). An average nighttime temperature of 27.3°F (-2.6°C) is noted in Jolietville during the month of December.Humidity
The months with the highest humidity are January and December, with an average relative humidity of 83%.Rainfall
In Jolietville, during December, the rain falls for 10.9 days and regularly aggregates up to 2.56" (65mm) of precipitation. Throughout the year, there are 171 rainfall days, and 34.21" (869mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Jolietville, in December, snow falls for 8.5 days, with typically accumulated 3.43" (87mm) of snow. In Jolietville, Indiana, during the entire year, snow falls for 40.4 days and aggregates up to 15.63" (397mm) 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 7:48 am and sunset at 5:20 pm. On the last day of December, sunrise is at 8:06 am and sunset at 5:29 pm EST.
Sunshine
The average sunshine in December is 4.2h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 1 in December translates into this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The solar radiation around mid-day is intense; avoid the Sun and stay safe. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. 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 does it get in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in Jolietville in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Jolietville have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Jolietville have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Jolietville, IN
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Jolietville, IN
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Jolietville, IN
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Jolietville, IN
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Jolietville, IN
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is April (4.21").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Jolietville, IN
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is May (20.4 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Jolietville, IN
- Average snowfall in December: 3.43"
The month with the highest snowfall is February (4.25").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Jolietville, IN
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jolietville, 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 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Jolietville, IN
- Average sunshine days in December: 13.2 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is May (9.1 days).
Average UV index in December
Jolietville, 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
Jolietville, IN
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Jolietville, IN
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Jolietville, Indiana, USA
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