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
Onawa Junction's transition into December marks a considerable drop in the average high-temperature, moving down from a frosty 44.1°F (6.7°C) in November to a freezing cold 29.1°F (-1.6°C). In Onawa Junction, December nights witness a steady temperature drop to a still subzero cold 19°F (-7.2°C).Humidity
In December, the average relative humidity is 82%.Rainfall
In Onawa Junction, in December, it is raining for 4.2 days, with typically 0.94" (24mm) of accumulated precipitation. Throughout the year, in Onawa Junction, there are 117 rainfall days, and 19.84" (504mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Onawa Junction, during December, snow falls for 8 days and regularly aggregates up to 1.77" (45mm) of snow. In Onawa Junction, Iowa, during the entire year, snow falls for 36.4 days and aggregates up to 10.67" (271mm) of snow.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 7:33 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 4:58 pm CST.
Sunshine
In December, the average sunshine in Onawa Junction, Iowa, is 4.7h.UV index
The average daily maximum UV index in December in Onawa Junction is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 2 in December leads to these guidelines:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Onawa Junction in December?
What is the average humidity in December in Onawa Junction?
How many days does it rain in December in Onawa Junction?
How many days does it snow in December in Onawa Junction?
What is the month with the shortest days in Onawa Junction?
How many hours of daylight does Onawa Junction have in December?
When are sunrise and sunset in December in Onawa Junction?
How long on average sun shines in December in Onawa Junction?
How high is the UV index in December in Onawa Junction?
Average temperature in December
Onawa Junction, IA
- Average high temperature in December: 29.1°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 (24.4°F).
- Average low temperature in December: 19°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in December
Onawa Junction, 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 (29.87"Hg).
Average wind speed in December
Onawa Junction, IA
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in December
Onawa Junction, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in December
Onawa Junction, IA
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Onawa Junction, IA
- Average rainfall days in December: 4.2 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in December
Onawa Junction, IA
- Average snowfall in December: 1.77"
The month with the highest snowfall is February (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Onawa Junction, IA
- Average snowfall days in December: 8 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Onawa Junction, 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 4min
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 6min).
Average sunshine days in December
Onawa Junction, IA
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in December
Onawa Junction, 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
Onawa Junction, 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 July (Cloud cover 28).
Average visibility in December
Onawa Junction, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Onawa Junction, Iowa, USA
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