December weather forecastStorm Lake, IA
December
Weather in December
Rounding off the year, December in Storm Lake, Iowa takes residents into the cozy winter wonderland. With a stark drop in temperature and possible snowfall, the month mimics the stereotypical imagery of holiday season. The colder climate comes into full effect, with temperatures spanning from 0.75" (19mm) to 1.14" (29mm), setting the tone for the upcoming deep winter month of January. As the year comes to an end, warming fires, hot cocoa, and festive lights become the highlights for everyone in Storm Lake, Iowa.Temperature
Storm Lake sees a considerable decrease in average high-temperatures during December, falling from a frosty 44.2°F (6.8°C) in November to a freezing cold 29.3°F (-1.5°C). December nights cool down to an average low-temperature of 19.2°F (-7.1°C).Humidity
In Storm Lake, Iowa, the average relative humidity in December is 82%.Rainfall
In Storm Lake, in December, during 5.1 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, there are 135.1 rainfall days, and 26.73" (679mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Storm Lake. In December, it is snowing for 11.3 days. Throughout December, 2.76" (70mm) of snow is accumulated. In Storm Lake, during the entire year, snow falls for 50 days and aggregates up to 20.04" (509mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December in Storm Lake, sunrise is at 7:31 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:57 pm CST.
Sunshine
In December, the average sunshine in Storm Lake is 4.7h.UV index
The average daily maximum UV index in December in Storm Lake is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: During December, 2 as the daily maximum UV index converts into the following advice:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Storm Lake, IA
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (24.6°F).
- Average low temperature in December: 19.2°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Storm Lake, 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
Storm Lake, IA
- Average wind speed in December: 10.8mph
The windiest months (with the highest average wind speed) are January and April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in December
Storm Lake, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in December
Storm Lake, IA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is June (4.02").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in December
Storm Lake, IA
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is June (19 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in December
Storm Lake, IA
- Average snowfall in December: 2.76"
The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Storm Lake, IA
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Storm Lake, IA
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Storm Lake, IA
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in December
Storm Lake, 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 and February (UV index 1).
Average cloud cover in December
Storm Lake, IA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Storm Lake, 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).
