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
Start of December brings a shift in the average high-temperature, falling from November's frosty 43.9°F (6.6°C) to a freezing cold 30.6°F (-0.8°C). An average low-temperature of 19.9°F (-6.7°C) is observed during December nights.Humidity
In Norris Siding, the average relative humidity in December is 83%.Rainfall
In Norris Siding, in December, it is raining for 6.4 days, with typically 1.65" (42mm) of accumulated precipitation. Throughout the year, in Norris Siding, there are 148.3 rainfall days, and 31.02" (788mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Norris Siding, in December, during 12.5 snowfall days, 4.13" (105mm) of snow is typically accumulated. Throughout the year, in Norris Siding, there are 53.2 snowfall days, and 22.4" (569mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:20 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:46 pm CST.
Sunshine
In December, the average sunshine in Norris Siding is 4.3h.UV index
In Norris Siding, Iowa, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Norris Siding?
What is the average humidity in December in Norris Siding?
How much does it rain in Norris Siding in December?
How many days does it snow in December in Norris Siding?
What is the month with the shortest days in Norris Siding?
What is the average length of the day in December in Norris Siding?
When is the sunrise / sunset in December in Norris Siding?
How long on average sun shines in December in Norris Siding?
How high is the UV index in December in Norris Siding?
Average temperature in December
Norris Siding, IA
- Average high temperature in December: 30.6°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in December: 19.9°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in December
Norris Siding, IA
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Norris Siding, IA
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Norris Siding, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Norris Siding, IA
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is June (4.76").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in December
Norris Siding, IA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is June (20.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Norris Siding, IA
- Average snowfall in December: 4.13"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Norris Siding, IA
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Norris Siding, 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 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Norris Siding, IA
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in December
Norris Siding, IA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Norris Siding, IA
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in December
Norris Siding, IA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Norris Siding, Iowa, USA
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