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
A subtle decrease in the average high-temperature marks December, falling from November's fresh 50.5°F (10.3°C) to a wintry 39.7°F (4.3°C). During the month of December, an average low-temperature of 28.8°F (-1.8°C) is recorded.Humidity
In Jewett, the average relative humidity in December is 79%.Rainfall
In Jewett, in December, it is raining for 7 days, with typically 0.71" (18mm) of accumulated precipitation. In Jewett, during the entire year, the rain falls for 111.4 days and collects up to 10.31" (262mm) of precipitation.Snowfall
January through March, October through December are months with snowfall. December is the month with the most snowfall in Jewett, Illinois. Snow falls for 3.4 days and accumulates 0.87" (22mm) of snow.Daylight
December has the shortest days of the year in Jewett, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 6:54 am and sunset at 4:30 pm. On the last day of December, in Jewett, sunrise is at 7:12 am and sunset at 4:40 pm CST.
Sunshine
In Jewett, the average sunshine in December is 4.6h.UV index
The month with the lowest UV index in Jewett is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 1 during December leads to these instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. To guard against the harmful effects of the Sun, minimize exposure during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Jewett in December?
What is the average humidity in December in Jewett?
How many days does it rain in December in Jewett?
When does it snow the most in Jewett?
How many days does it snow in December in Jewett?
What is the month with the shortest days in Jewett?
What is the average length of the day in December in Jewett?
When are sunrise and sunset in December in Jewett?
How many hours of sunshine does Jewett have in December?
When is the lowest UV index in Jewett?
What is the UV index intensity in December in Jewett?
Average temperature in December
Jewett, IL
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.5°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in December
Jewett, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Jewett, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Jewett, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Jewett, IL
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is April (1.3").
The driest months (with the least rainfall) are February, September and November (0.51").
Average rainfall days in December
Jewett, IL
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in December
Jewett, IL
- Average snowfall in December: 0.87"
The month with the highest snowfall is December (0.87").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Jewett, IL
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is February (5.3 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
Jewett, IL
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Jewett, IL
- Average sunshine days in December: 21.3 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in December
Jewett, IL
- 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
Jewett, IL
- 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 29).
Average visibility in December
Jewett, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Jewett, Illinois, USA
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