December weather forecastMontrose, IL
December
Weather in December
The first month of the winter, December, is also an icy month in Montrose, Illinois, with an average temperature fluctuating between 40.3°F (4.6°C) and 29.1°F (-1.6°C).Temperature
Montrose experiences a temperature shift at the start of December, with average high-temperatures adjusting from a cool 51.1°F (10.6°C) in November to a cold 40.3°F (4.6°C). During the month of December, Montrose experiences a steady low-temperature average of 29.1°F (-1.6°C).Humidity
In Montrose, the average relative humidity in December is 79%.Rainfall
In Montrose, during December, the rain falls for 8.6 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Montrose, during the entire year, the rain falls for 135.9 days and collects up to 21.89" (556mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Montrose, in December, during 3.5 snowfall days, 1.14" (29mm) of snow is typically accumulated. In Montrose, during the entire year, snow falls for 17.7 days and aggregates up to 4.17" (106mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of December in Montrose, sunrise is at 6:54 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:40 pm CST.
Sunshine
In Montrose, the average sunshine in December is 4.6h.UV index
The months with the lowest UV index in Montrose are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The solar radiation around mid-day is intense; avoid the Sun and stay safe. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Montrose, IL
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Montrose, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Montrose, IL
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
Montrose, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Montrose, IL
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in December
Montrose, IL
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in December
Montrose, IL
- Average snowfall in December: 1.14"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Montrose, IL
- Average snowfall days in December: 3.5 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, September and October (0 days).
Average daylight in December /
Average sunshine in December
Montrose, IL
- Average daylight in December: 9h and 30min
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 36min
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 18min).
Average sunshine days in December
Montrose, IL
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in December
Montrose, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Montrose, IL
- Average cloud cover in December: 51
The months with the most cloud cover are January and February (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in December
Montrose, 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).
