December weather forecastManchester, IL
December
Weather in December
The first month of the winter, December, is also an icy month in Manchester, Illinois, with temperature in the range of an average low of 28.4°F (-2°C) and an average high of 40.1°F (4.5°C).Temperature
December's arrival coincides with a drop in the average high-temperature, decreasing from November's fresh 51.6°F (10.9°C) to a cold 40.1°F (4.5°C). Throughout December, an average low-temperature of 28.4°F (-2°C) is experienced in Manchester.Humidity
In December, the average relative humidity in Manchester is 77%.Rainfall
In December, in Manchester, the rain falls for 6.7 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. In Manchester, Illinois, during the entire year, the rain falls for 127.3 days and collects up to 17.24" (438mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Manchester, in December, during 4.2 snowfall days, 0.91" (23mm) of snow is typically accumulated. Throughout the year, there are 22.5 snowfall days, and 5.08" (129mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:37 pm. On the last day of December, in Manchester, sunrise is at 7:21 am and sunset at 4:47 pm CST.
Sunshine
The average sunshine in December in Manchester is 4.8h.UV index
The months with the lowest UV index in Manchester are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Manchester, IL
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Manchester, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Manchester, IL
- Average wind speed in December: 9.3mph
The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in December
Manchester, IL
- Average humidity in December: 77%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Manchester, IL
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is June (2.44").
The driest months (with the least rainfall) are January and November (0.83").
Average rainfall days in December
Manchester, IL
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (5.5 days).
Average snowfall in December
Manchester, IL
- Average snowfall in December: 0.91"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Manchester, IL
- Average snowfall days in December: 4.2 days
The month with the highest number of snowfall days is January (7.2 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
Manchester, IL
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 4h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Manchester, IL
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in December
Manchester, 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
Manchester, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Manchester, 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).
