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 moderate decline in the average high-temperature is seen during December, decreasing from a chilly 47.7°F (8.7°C) in November to a cold 36.5°F (2.5°C). Nighttime temperature lowers to an average of 25.9°F (-3.4°C) in December.Humidity
The average relative humidity in December is 81%.Rainfall
In Secor, in December, during 5.9 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 131.6 rainfall days, and 18.86" (479mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Secor, during December, snow falls for 5.9 days and regularly aggregates up to 1.26" (32mm) of snow. In Secor, during the entire year, snow falls for 30.1 days and aggregates up to 9.17" (233mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:39 pm CST.
Sunshine
In Secor, the average sunshine in December is 4.3h.UV index
December is the month with the lowest UV index in Secor, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 1 during December translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. 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 many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days in Secor?
How many hours of daylight does Secor have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Secor have in December?
When is the lowest UV index?
What is the UV index intensity in December in Secor?
Average temperature in December
Secor, IL
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in December: 25.9°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 (18.5°F).
Average pressure in December
Secor, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Secor, IL
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Secor, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Secor, IL
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in December
Secor, IL
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in December
Secor, IL
- Average snowfall in December: 1.26"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Secor, IL
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (10.6 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
Secor, IL
- 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 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Secor, IL
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in December
Secor, 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
Secor, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in December
Secor, IL
- 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).
Secor, Illinois, USA
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