December weather forecastWalnut, IA
December
Weather in December
December, the first month of the winter in Walnut, is also a wintry month, with an average temperature fluctuating between 33.4°F (0.8°C) and 21.4°F (-5.9°C).Temperature
December brings a minor decrease, with the average high-temperature reducing from a chilly 47.3°F (8.5°C) in November to a wintry 33.4°F (0.8°C). During the nights in December, the temperature averages to a subzero cold 21.4°F (-5.9°C).Humidity
The average relative humidity in December is 79%.Rainfall
In Walnut, in December, during 5.2 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. In Walnut, during the entire year, the rain falls for 127.7 days and collects up to 26.57" (675mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 8.5 days. Throughout December, 2.72" (69mm) of snow is accumulated. Throughout the year, in Walnut, there are 35.8 snowfall days, and 13.82" (351mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:28 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 5:01 pm CST.
Sunshine
In Walnut, the average sunshine in December is 4.9h.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 estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Walnut, IA
- Average high temperature in December: 33.4°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 21.4°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in December
Walnut, IA
- Average pressure in December: 30.13"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
Walnut, IA
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in December
Walnut, IA
- Average humidity in December: 79%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (68%).
Average rainfall in December
Walnut, IA
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is June (4.37").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in December
Walnut, IA
- Average rainfall days in December: 5.2 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in December
Walnut, IA
- Average snowfall in December: 2.72"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Walnut, IA
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Walnut, IA
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Walnut, IA
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (11 days).
Average UV index in December
Walnut, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (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
Walnut, IA
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Walnut, 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).
