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
Rock Rapids's weather in December is marked by a clear decrease in the average high-temperature, moving down from November's frosty 43.2°F (6.2°C) to a freezing cold 27.3°F (-2.6°C). In the month of December, an average of 15.8°F (-9°C) marks the low-temperature.Humidity
The average relative humidity in December in Rock Rapids is 85%.Rainfall
In Rock Rapids, during December, the rain falls for 4.5 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, in Rock Rapids, there are 119.2 rainfall days, and 22.13" (562mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Rock Rapids, in December, during 11.6 snowfall days, 3.46" (88mm) of snow is typically accumulated. Throughout the year, there are 48.3 snowfall days, and 19.29" (490mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of December in Rock Rapids, sunrise is at 7:38 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 4:58 pm CST.
Sunshine
In Rock Rapids, the average sunshine in December is 4.3h.UV index
In Rock Rapids, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 during December translates into the following guidance:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Rock Rapids in December?
What is the average humidity in December in Rock Rapids?
How many days does it rain in December in Rock Rapids?
How much does it snow in Rock Rapids in December?
What is the month with the shortest days in Rock Rapids?
How many hours of daylight does Rock Rapids have in December?
What time are sunrise and sunset in December in Rock Rapids?
How many hours of sunshine does Rock Rapids have in December?
What is the UV index intensity in December in Rock Rapids?
Average temperature in December
Rock Rapids, IA
- Average high temperature in December: 27.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in December: 15.8°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in December
Rock Rapids, 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 (29.86"Hg).
Average wind speed in December
Rock Rapids, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Rock Rapids, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Rock Rapids, IA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in December
Rock Rapids, IA
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in December
Rock Rapids, IA
- Average snowfall in December: 3.46"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rock Rapids, IA
- Average snowfall days in December: 11.6 days
The month with the highest number of snowfall days is December (11.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rock Rapids, IA
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Rock Rapids, IA
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in December
Rock Rapids, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Rock Rapids, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Rock Rapids, 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).
Rock Rapids, Iowa, USA
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