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
The shift into December is marked by a considerable temperature decrease, with the average high-temperature dropping from a wintry 42.6°F (5.9°C) in November to a freezing cold 28.2°F (-2.1°C). Rockwell throughout December, records an average low-temperature of 17.8°F (-7.9°C).Humidity
In December, the average relative humidity in Rockwell is 86%.Rainfall
In Rockwell, during December, the rain falls for 5.8 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 145.9 rainfall days, and 28.82" (732mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, in Rockwell, it is snowing for 13.3 days. Throughout December, 4.17" (106mm) of snow is accumulated. Throughout the year, in Rockwell, there are 60.2 snowfall days, and 26.26" (667mm) 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 in Rockwell, sunrise is at 7:24 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 4:48 pm CST.
Sunshine
The average sunshine in December in Rockwell is 4.1h.UV index
The months with the lowest UV index in Rockwell, Iowa, are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In December, an average UV index of 1 transforms into the following instructions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
How cold is it in Rockwell in December?
What is the average humidity in December in Rockwell?
How many days does it rain in December in Rockwell?
How much does it snow in Rockwell in December?
What is the month with the shortest days in Rockwell?
How many hours of daylight does Rockwell have in December?
When is the sunrise / sunset in December in Rockwell?
How many hours of sunshine does Rockwell have in December?
What is the month with the lowest UV index in Rockwell?
How high is the UV index in December in Rockwell?
Average temperature in December
Rockwell, IA
- Average high temperature in December: 28.2°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in December: 17.8°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in December
Rockwell, IA
- Average pressure in December: 30.11"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
Rockwell, IA
- Average wind speed in December: 10.4mph
The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in December
Rockwell, IA
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Rockwell, IA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is June (4.65").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Rockwell, IA
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Rockwell, IA
- Average snowfall in December: 4.17"
The month with the highest snowfall is February (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rockwell, IA
- Average snowfall days in December: 13.3 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rockwell, IA
- Average daylight in December: 9h and 1min
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 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Rockwell, IA
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (8 days).
Average UV index in December
Rockwell, IA
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Rockwell, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Rockwell, IA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Rockwell, Iowa, USA
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