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
With December's arrival, Ryan's weather changes as the average high-temperature falls from a chilly 43.7°F (6.5°C) in November to a subzero cold 31.1°F (-0.5°C). Ryan's nights in December experience an average temperature drop to a still freezing cold 20.5°F (-6.4°C).Humidity
In December, the average relative humidity is 83%.Rainfall
December is the month with the least rainfall. Rain falls for 4.5 days and accumulates 0.47" (12mm) of precipitation.Snowfall
Months with snowfall in Ryan are January through April, October through December. In December, in Ryan, it is snowing for 8.8 days. Throughout December, 0.94" (24mm) of snow is accumulated. In Ryan, during the entire year, snow falls for 39.4 days and aggregates up to 6.81" (173mm) of snow.Daylight
December has the shortest days of the year in Ryan, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:43 pm CST.
Sunshine
In December, the average sunshine in Ryan is 4h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 1 in December leads to these recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
How cold is it in Ryan in December?
What is the average humidity in December in Ryan?
What is the driest month in Ryan?
How many days does it rain in December in Ryan?
How many days does it snow in December in Ryan?
What is the month with the shortest days in Ryan?
How many hours of daylight does Ryan have in December?
When is the sunrise / sunset in December in Ryan?
How many hours of sunshine does Ryan have in December?
What are the months with the lowest UV index in Ryan?
How high is the UV index in December in Ryan?
Average temperature in December
Ryan, IA
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Ryan, IA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Ryan, IA
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Ryan, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in December
Ryan, IA
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is December (0.47").
Average rainfall days in December
Ryan, IA
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in December
Ryan, IA
- Average snowfall in December: 0.94"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Ryan, IA
- Average snowfall days in December: 8.8 days
The month with the highest number of snowfall days is January (10.8 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
Ryan, 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 6min).
- Average sunshine in December: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Ryan, IA
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in December
Ryan, IA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Ryan, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Ryan, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Ryan, Iowa, USA
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