December weather forecastAmmon, ID
December
Weather in December
December in Ammon witnesses the arrival of full-fledged winter. Snowfall in December reaches an average of 3.46" (88mm), layering the city in a white blanket. The chilly state continues to persist, setting the stage for a typical winter holiday season. The days shorten, often sparkling with sunshine that contrasts against the white landscape. As the year concludes, Ammon is wrapped in a picturesque winter scene, befitting the festive season at year’s end.Temperature
Temperature readings in Ammon reach their annual highs in December, averaging 27.9°F (-2.3°C) and a minimum average of 15.8°F (-9°C).Humidity
The average relative humidity in December is 86%.Rainfall
In Ammon, in December, during 5.5 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. Throughout the year, there are 84.3 rainfall days, and 6.97" (177mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Ammon. In December, it is snowing for 12.9 days. Throughout December, 3.46" (88mm) of snow is accumulated. Throughout the year, in Ammon, there are 54.4 snowfall days, and 16.89" (429mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:41 am and sunset at 4:52 pm. On the last day of December, sunrise is at 8:00 am and sunset at 5:01 pm MST.
Sunshine
In Ammon, Idaho, the average sunshine in December is 5h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ammon, ID
- Average high temperature in December: 27.9°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in December: 15.8°F
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure in December
Ammon, ID
- Average pressure in December: 30.26"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Ammon, ID
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).
Average humidity in December
Ammon, 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 (35%).
Average rainfall in December
Ammon, ID
- Average rainfall in December: 0.47"
The wettest months (with the highest rainfall) are May and September (0.83").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Ammon, ID
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (10.7 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in December
Ammon, ID
- Average snowfall in December: 3.46"
The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Ammon, ID
- Average snowfall days in December: 12.9 days
The month with the highest number of snowfall days is December (12.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Ammon, ID
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Ammon, ID
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is February (16.2 days).
Average UV index in December
Ammon, ID
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Ammon, ID
- Average cloud cover in December: 50
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Ammon, ID
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
