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, characterized by an average high temperature of 28.8°F (-1.8°C) and a low temperature of 14.9°F (-9.5°C), is generally the coldest month.Humidity
The average relative humidity in December is 86%.Rainfall
In Dayton, during December, the rain falls for 9.6 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, in Dayton, there are 127.4 rainfall days, and 18.27" (464mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In December, in Dayton, it is snowing for 17.3 days. Throughout December, 12.4" (315mm) of snow is accumulated. Throughout the year, there are 83.8 snowfall days, and 60.12" (1527mm) of snow is accumulated.Daylight
The month with the shortest days in Dayton is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:37 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:06 pm MST.
Sunshine
In December, the average sunshine is 5.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Dayton. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 1 in December leads to these guidelines:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Around midday, solar radiation is most harmful; hence, exposure should be limited. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Dayton?
How cold is December?
What is the average humidity in December in Dayton?
How much does it rain in Dayton in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Dayton have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Dayton, ID
- Average high temperature in December: 28.8°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in December: 14.9°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Dayton, ID
- Average pressure in December: 30.25"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Dayton, ID
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in December
Dayton, ID
- Average humidity in December: 86%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Dayton, ID
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is February (2.24").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Dayton, ID
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is July (5.5 days).
Average snowfall in December
Dayton, ID
- Average snowfall in December: 12.4"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Dayton, ID
- Average snowfall days in December: 17.3 days
The months with the highest number of snowfall days are January and February (17.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Dayton, ID
- 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: 5h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Dayton, ID
- Average sunshine days in December: 11.2 days
The month with the most sunshine days is July (21.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in December
Dayton, ID
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Dayton, ID
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in December
Dayton, ID
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Dayton, Idaho, USA
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