December weather forecastStory City, IA
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Story City, Iowa, with an average temperature fluctuating between 20.5°F (-6.4°C) and 31.5°F (-0.3°C).Temperature
December brings a decrease in the average high-temperature, shifting from a frosty 45°F (7.2°C) in November to a subzero cold 31.5°F (-0.3°C). An average minimum temperature of 20.5°F (-6.4°C) is recorded during the month of December.Humidity
In Story City, Iowa, the average relative humidity in December is 81%.Rainfall
In Story City, during December, the rain falls for 5.6 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 143.3 rainfall days, and 29.25" (743mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Story City, Iowa, in December, snow falls for 10.5 days, with typically accumulated 3.27" (83mm) of snow. Throughout the year, there are 45.8 snowfall days, and 16.85" (428mm) 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 7:24 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 4:52 pm CST.
Sunshine
In Story City, the average sunshine in December is 4.5h.UV index
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. 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
Story City, IA
- Average high temperature in December: 31.5°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 (25.5°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in December
Story City, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Story City, IA
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Story City, IA
- Average humidity in December: 81%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Story City, IA
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Story City, IA
- Average rainfall days in December: 5.6 days
The months with the highest number of rainy days are May and June (19.2 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in December
Story City, IA
- Average snowfall in December: 3.27"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Story City, IA
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Story City, 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 30min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Story City, IA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (8.5 days).
Average UV index in December
Story City, 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, October, November and December (UV index 2).
Average cloud cover in December
Story City, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in December
Story City, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
