Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
In Walnut, entering December brings a temperature decrement, reducing from November's frosty 47.3°F (8.5°C) to a cold 33.4°F (0.8°C). Walnut experiences an average low-temperature reading of 21.4°F (-5.9°C) throughout December.Humidity
In December, the average relative humidity in Walnut is 79%.Rainfall
In Walnut, in December, it is raining for 5.2 days, with typically 1.61" (41mm) of accumulated precipitation. In Walnut, during the entire year, the rain falls for 127.7 days and collects up to 26.57" (675mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Walnut. In Walnut, in December, during 8.5 snowfall days, 2.72" (69mm) of snow is typically accumulated. In Walnut, during the entire year, snow falls for 35.8 days and aggregates up to 13.82" (351mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December in Walnut, 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 December, the average sunshine in Walnut is 4.9h.UV index
The months with the lowest UV index in Walnut, Iowa, are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Frequently asked questions
How cold is it in Walnut in December?
What is the average humidity in December in Walnut?
How many days does it rain in December in Walnut?
How many days does it snow in December in Walnut?
What is the month with the shortest days in Walnut?
How many hours of daylight does Walnut have in December?
When is the sunrise / sunset in December in Walnut?
How long on average sun shines in December in Walnut?
What is the month with the lowest UV index in Walnut?
What is the UV index intensity in December in Walnut?
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 1min
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 5min
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).
Walnut, Iowa, USA
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