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 transition into December indicates a reduction in the average high-temperature, down to a cold 35.6°F (2°C) from November's frosty 47.3°F (8.5°C). During December, Streator's temperature falls to a steady low-temperature average of 25.5°F (-3.6°C).Humidity
In Streator, the average relative humidity in December is 82%.Rainfall
December is the month with the least rainfall in Streator. Rain falls for 6.9 days and accumulates 1.18" (30mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Streator, Illinois. In Streator, in December, snow falls for 7.8 days, with typically accumulated 1.46" (37mm) of snow. Throughout the year, in Streator, there are 37.9 snowfall days, and 12.91" (328mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Streator.On the first day of December in Streator, Illinois, sunrise is at 7:01 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:36 pm CST.
Sunshine
In Streator, the average sunshine in December is 4.3h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, a regular UV index of 1 translates into these guidelines:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is it in Streator in December?
What is the average humidity in December in Streator?
What is the driest month in Streator?
How many days does it rain in December in Streator?
How much does it snow in Streator in December?
What is the month with the shortest days in Streator?
What is the average length of the day in December in Streator?
When are sunrise and sunset in December in Streator?
How long on average sun shines in December in Streator?
What is the month with the lowest UV index in Streator?
What is the UV index intensity in December in Streator?
Average temperature in December
Streator, IL
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in December
Streator, IL
- 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 (29.92"Hg).
Average wind speed in December
Streator, IL
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Streator, IL
- Average humidity in December: 82%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Streator, IL
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is December (1.18").
Average rainfall days in December
Streator, IL
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Streator, IL
- Average snowfall in December: 1.46"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Streator, IL
- Average snowfall days in December: 7.8 days
The month with the highest number of snowfall days is January (11.8 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
Streator, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Streator, IL
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is July (9.2 days).
Average UV index in December
Streator, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Streator, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in December
Streator, 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).
Streator, Illinois, USA
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