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 onset of December entails a temperature shift, as the average high-temperature decreases from a frosty 47.7°F (8.7°C) in November to a wintry 35.2°F (1.8°C). Throughout the month of December, Richland reports a steady low-temperature average of 24.1°F (-4.4°C).Humidity
In December, the average relative humidity is 79%.Rainfall
The months with the least rainfall are January and December Rain falls for 7.1 days and accumulates 1.18" (30mm) of rain.Snowfall
January through April, October through December are months with snowfall. In Richland, in December, snow falls for 6.5 days, with typically accumulated 1.65" (42mm) of snow. In Richland, during the entire year, snow falls for 32.1 days and aggregates up to 14.33" (364mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:14 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:49 pm CST.
Sunshine
In December, the average sunshine is 4.5h.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
What is the driest month in Richland?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Richland have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Richland have in December?
How high is the UV index in December?
Average temperature in December
Richland, IA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in December
Richland, 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 (29.9"Hg).
Average wind speed in December
Richland, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in December
Richland, IA
- Average humidity in December: 79%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Richland, IA
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and December (1.18").
Average rainfall days in December
Richland, IA
- Average rainfall days in December: 7.1 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Richland, IA
- Average snowfall in December: 1.65"
The months with the highest snowfall are January and February (4.33").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Richland, IA
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (10.3 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
Richland, IA
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 4h and 3min
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
Richland, IA
- Average sunshine days in December: 18 days
The months with the most sunshine days are October and November (18.8 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Richland, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Richland, IA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Richland, 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).
Richland, Iowa, USA
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