December weather forecastLong Grove, IA
December
Weather in December
The first month of the winter, December, is still a cold month in Long Grove, Iowa, with an average temperature ranging between min 23.4°F (-4.8°C) and max 34°F (1.1°C).Temperature
The onset of December results in a decrease in the average high-temperature, receding from a chilly 46.4°F (8°C) in November to a wintry 34°F (1.1°C). During December, Long Grove consistently records a temperature low averaging a subzero cold 23.4°F (-4.8°C).Humidity
In Long Grove, Iowa, the average relative humidity in December is 81%.Rainfall
December is the month with the least rainfall. Rain falls for 4.7 days and accumulates 0.51" (13mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Long Grove. In Long Grove, during December, snow falls for 6.5 days and regularly aggregates up to 0.63" (16mm) of snow. Throughout the year, there are 30.5 snowfall days, and 6.18" (157mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:10 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:42 pm CST.
Sunshine
In Long Grove, the average sunshine in December is 4.4h.UV index
The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
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. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Long Grove, IA
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 23.4°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in December
Long Grove, IA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Long Grove, IA
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in December
Long Grove, IA
- Average humidity in December: 81%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Long Grove, IA
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is December (0.51").
Average rainfall days in December
Long Grove, IA
- Average rainfall days in December: 4.7 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in December
Long Grove, IA
- Average snowfall in December: 0.63"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Long Grove, IA
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (9.3 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
Long Grove, IA
- 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 24min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Long Grove, IA
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is June (12.9 days).
Average UV index in December
Long Grove, IA
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Long Grove, IA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are July, August and September (Cloud cover 30).
Average visibility in December
Long Grove, IA
- 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).
