December weather forecastMorton Grove, IL
December
Weather in December
December, the first month of the winter in Morton Grove, is also a wintry month, with an average temperature fluctuating between 35.1°F (1.7°C) and 27.1°F (-2.7°C).Temperature
As December arrives, Morton Grove's weather displays a decrease in high-temperatures, transitioning from November's frosty 45.7°F (7.6°C) to an icy 35.1°F (1.7°C). In Morton Grove, the nightly December temperatures experience a slight descent from daily highs to an average low of 27.1°F (-2.7°C).Humidity
In December, the average relative humidity is 80%.Rainfall
December is the month with the least rainfall. Rain falls for 6.8 days and accumulates 0.94" (24mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Morton Grove, Illinois. In Morton Grove, Illinois, in December, during 9.4 snowfall days, 1.54" (39mm) of snow is typically accumulated. In Morton Grove, during the entire year, snow falls for 41.4 days and aggregates up to 9.65" (245mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:20 pm. On the last day of December, in Morton Grove, sunrise is at 7:19 am and sunset at 4:29 pm CST.
Sunshine
In Morton Grove, the average sunshine in December is 4h.UV index
The months with the lowest UV index in Morton Grove are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the UV index of 1 transforms into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Morton Grove, IL
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in December: 27.1°F
The months with the highest average low temperature are July and August (67.6°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Morton Grove, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Morton Grove, IL
- Average wind speed in December: 11.4mph
The windiest month (with the highest average wind speed) is January (12.2mph).
The calmest months (with the lowest average wind speed) are July and August (7.7mph).
Average humidity in December
Morton Grove, IL
- Average humidity in December: 80%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Morton Grove, IL
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is June (3.5").
The driest month (with the least rainfall) is December (0.94").
Average rainfall days in December
Morton Grove, IL
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in December
Morton Grove, IL
- Average snowfall in December: 1.54"
The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Morton Grove, IL
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is January (11.7 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
Morton Grove, IL
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Morton Grove, IL
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in December
Morton Grove, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Morton Grove, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Morton Grove, 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).
