December weather forecastSuperior, IA
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Superior, Iowa, with an average temperature fluctuating between 26.8°F (-2.9°C) and 16.2°F (-8.8°C).Temperature
The average high-temperature exhibits a considerable decrease in December, dropping from an icy 42.3°F (5.7°C) in November to a freezing cold 26.8°F (-2.9°C). Throughout the month of December, Superior sees a steady low-temperature average of 16.2°F (-8.8°C).Humidity
In Superior, the average relative humidity in December is 85%.Rainfall
In Superior, in December, it is raining for 3.6 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, there are 124.6 rainfall days, and 24.37" (619mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Superior, in December, snow falls for 10.9 days, with typically accumulated 3.66" (93mm) of snow. In Superior, Iowa, during the entire year, snow falls for 47.4 days and aggregates up to 21.93" (557mm) of snow.Daylight
December has the shortest days of the year in Superior, Iowa, with an average of 9h and 0min of daylight.On the first day of December in Superior, Iowa, sunrise is at 7:33 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 4:53 pm CST.
Sunshine
In Superior, the average sunshine in December is 4.3h.UV index
In Superior, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Superior, IA
- Average high temperature in December: 26.8°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 16.2°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in December
Superior, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Superior, IA
- Average wind speed in December: 10.9mph
The windiest months (with the highest average wind speed) are January, February and April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Superior, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
Superior, IA
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in December
Superior, IA
- Average rainfall days in December: 3.6 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in December
Superior, IA
- Average snowfall in December: 3.66"
The month with the highest snowfall is February (5.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Superior, IA
- Average snowfall days in December: 10.9 days
The month with the highest number of snowfall days is December (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Superior, IA
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 18min
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
Superior, IA
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (8.6 days).
Average UV index in December
Superior, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in December
Superior, IA
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Superior, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
