December weather forecastCascade, IA
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Cascade, Iowa, with temperature in the range of an average high of 31.8°F (-0.1°C) and an average low of 21.2°F (-6°C).Temperature
The arrival of December corresponds with a temperature reduction, down from November's frosty 44.2°F (6.8°C) to a subzero cold 31.8°F (-0.1°C). Throughout the month of December, Cascade witnesses an average low-temperature of 21.2°F (-6°C).Humidity
In December, the average relative humidity is 82%.Rainfall
In Cascade, during December, the rain falls for 7.2 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Cascade, during the entire year, the rain falls for 140.9 days and collects up to 28.7" (729mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Cascade, during December, snow falls for 9.2 days and regularly aggregates up to 3.07" (78mm) of snow. Throughout the year, there are 43.7 snowfall days, and 16.73" (425mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:14 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:41 pm CST.
Sunshine
In Cascade, the average sunshine in December is 4.1h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 1 in December suggests the following recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cascade, IA
- Average high temperature in December: 31.8°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.6°F).
- Average low temperature in December: 21.2°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Cascade, 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
Cascade, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in December
Cascade, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Cascade, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days in December
Cascade, IA
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in December
Cascade, IA
- Average snowfall in December: 3.07"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Cascade, IA
- Average snowfall days in December: 9.2 days
The month with the highest number of snowfall days is January (12.2 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
Cascade, IA
- Average daylight in December: 9h and 6min
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 6min).
- Average sunshine in December: 4h and 6min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Cascade, IA
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is December (17.3 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Cascade, IA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Cascade, IA
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Cascade, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
