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
In December, the meteorological conditions markedly change with the average high-temperature descending from a frosty 47.3°F (8.5°C) in November to a wintry 32.2°F (0.1°C). In the month of December, Onawa's average low-temperature falls to a freezing cold 20.3°F (-6.5°C).Humidity
In December, the average relative humidity in Onawa is 79%.Rainfall
In Onawa, in December, it is raining for 3.5 days, with typically 1.42" (36mm) of accumulated precipitation. In Onawa, during the entire year, the rain falls for 117.6 days and collects up to 21.89" (556mm) of precipitation.Snowfall
Months with snowfall in Onawa are January through April, October through December. In Onawa, in December, snow falls for 7 days, with typically accumulated 2.13" (54mm) of snow. Throughout the year, there are 32.9 snowfall days, and 11.69" (297mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Onawa.On the first day of December in Onawa, sunrise is at 7:33 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 5:03 pm CST.
Sunshine
The average sunshine in December is 4.9h.UV index
The months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Mind you! Snow reflection can increase the intensity of 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 December in Onawa?
What is the average humidity in December in Onawa?
How much does it rain in Onawa in December?
How much does it snow in Onawa in December?
What is the month with the shortest days in Onawa?
What is the average length of the day in December in Onawa?
What time are sunrise and sunset in December in Onawa?
How long on average sun shines in December in Onawa?
When is the lowest UV index in Onawa?
What is the UV index reading in December in Onawa?
Average temperature in December
Onawa, IA
- Average high temperature in December: 32.2°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in December: 20.3°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in December
Onawa, 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
Onawa, IA
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in December
Onawa, IA
- Average humidity in December: 79%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).
Average rainfall in December
Onawa, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in December
Onawa, IA
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in December
Onawa, IA
- Average snowfall in December: 2.13"
The month with the highest snowfall is February (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Onawa, IA
- Average snowfall days in December: 7 days
The month with the highest number of snowfall days is January (8.9 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, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Onawa, IA
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).
Average UV index in December
Onawa, IA
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Onawa, IA
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Onawa, 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, Iowa, USA
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