December weather forecastRiverside, IA
December
Weather in December
December, the first month of the winter in Riverside, is still a cold month, with an average temperature ranging between max 34.5°F (1.4°C) and min 23.2°F (-4.9°C).Temperature
December brings a drop in Riverside's average high-temperature, falling from a frosty 47.1°F (8.4°C) in November to a cold 34.5°F (1.4°C). Throughout the nights in December, an average low-temperature of 23.2°F (-4.9°C) is noted in Riverside, Iowa.Humidity
The average relative humidity in December is 81%.Rainfall
In Riverside, Iowa, in December, during 6.8 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Riverside, during the entire year, the rain falls for 144.7 days and collects up to 30.16" (766mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Riverside, during December, snow falls for 6.9 days and regularly aggregates up to 1.93" (49mm) of snow. Throughout the year, there are 34.4 snowfall days, and 14.61" (371mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Riverside.On the first day of the month, sunrise is at 7:13 am and sunset at 4:37 pm. On the last day of December, in Riverside, sunrise is at 7:32 am and sunset at 4:46 pm CST.
Sunshine
In Riverside, Iowa, the average sunshine in December is 4.6h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Riverside. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take precaution! The reflection from snow can almost 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
Riverside, IA
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 23.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Riverside, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Riverside, IA
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in December
Riverside, IA
- Average humidity in December: 81%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Riverside, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in December
Riverside, IA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
Riverside, IA
- Average snowfall in December: 1.93"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Riverside, IA
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (9.8 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
Riverside, 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 36min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Riverside, IA
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in December
Riverside, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Riverside, IA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Riverside, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
