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
December's arrival witnesses a distinct drop in the average high-temperature, receding from November's frosty 48.2°F (9°C) to an icy 33.6°F (0.9°C). Treynor observes an average nighttime temperature of 21.9°F (-5.6°C) during December.Humidity
The average relative humidity in December is 78%.Rainfall
In Treynor, during December, the rain falls for 5 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, in Treynor, there are 125.8 rainfall days, and 25.35" (644mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Treynor. In Treynor, during December, snow falls for 7 days and regularly aggregates up to 2.36" (60mm) of snow. In Treynor, during the entire year, snow falls for 33.7 days and aggregates up to 13.07" (332mm) 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 in Treynor, sunrise is at 7:29 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 5:03 pm CST.
Sunshine
The average sunshine in December in Treynor is 5h.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 in December translates into this advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold is it in Treynor in December?
What is the average humidity in December in Treynor?
How much does it rain in Treynor in December?
How many days does it snow in December in Treynor?
What is the month with the shortest days in Treynor?
What is the average length of the day in December in Treynor?
What time are sunrise and sunset in December in Treynor?
How many hours of sunshine does Treynor have in December?
What is the month with the lowest UV index in Treynor?
What is the UV index reading in December in Treynor?
Average temperature in December
Treynor, IA
- Average high temperature in December: 33.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 21.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in December
Treynor, 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
Treynor, IA
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in December
Treynor, IA
- Average humidity in December: 78%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Treynor, IA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in December
Treynor, IA
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in December
Treynor, IA
- Average snowfall in December: 2.36"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Treynor, IA
- Average snowfall days in December: 7 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Treynor, 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: 5h and 0min
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 42min).
Average sunshine days in December
Treynor, IA
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Treynor, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in December
Treynor, IA
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in December
Treynor, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Treynor, Iowa, USA
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