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
Arrival of December comes with a reduction in the average high-temperature, falling from a fresh 53.8°F (12.1°C) in November to a chilly 43.9°F (6.6°C). An average temperature of 31.8°F (-0.1°C) marks the nights in December.Humidity
In Herrin, the average relative humidity in December is 78%.Rainfall
In Herrin, in December, it is raining for 9.1 days, with typically 1.46" (37mm) of accumulated precipitation. In Herrin, during the entire year, the rain falls for 137.6 days and collects up to 23.03" (585mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Herrin, during December, snow falls for 2.7 days and regularly aggregates up to 0.91" (23mm) of snow. In Herrin, during the entire year, snow falls for 14.5 days and aggregates up to 4.13" (105mm) of snow.Daylight
The month with the shortest days in Herrin is December, with an average of 9h and 36min of daylight.On the first day of December in Herrin, Illinois, sunrise is at 6:53 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 4:47 pm CST.
Sunshine
The average sunshine in December in Herrin is 4.7h.UV index
January, February 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 minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Herrin during December?
What is the average humidity in December in Herrin?
How many days does it rain in December in Herrin?
How many days does it snow in December in Herrin?
What is the month with the shortest days in Herrin?
What is the average length of the day in December in Herrin?
What time are sunrise and sunset in December in Herrin?
How long on average sun shines in December in Herrin?
What is the month with the lowest UV index in Herrin?
What is the UV index reading in December in Herrin?
Average temperature in December
Herrin, IL
- Average high temperature in December: 43.9°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Herrin, IL
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Herrin, IL
- Average wind speed in December: 8.8mph
The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Herrin, IL
- Average humidity in December: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Herrin, IL
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.1").
Average rainfall days in December
Herrin, IL
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in December
Herrin, IL
- Average snowfall in December: 0.91"
The months with the highest snowfall are January and February (0.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Herrin, IL
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is February (4.3 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
Herrin, IL
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Herrin, IL
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Herrin, IL
- 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 and December (UV index 2).
Average cloud cover in December
Herrin, IL
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June, August and September (Cloud cover 28).
Average visibility in December
Herrin, IL
- 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).
Herrin, Illinois, USA
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