December weather forecastIone, WA
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Ione, Washington, with an average temperature varying between 26.6°F (-3°C) and 15.3°F (-9.3°C).Temperature
Ione notes the coldest temperatures in December, with a high average of 26.6°F (-3°C) and a low of 15.3°F (-9.3°C).Humidity
In December, the average relative humidity is 93%.Rainfall
In Ione, in December, it is raining for 8.4 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 147.3 rainfall days, and 20.12" (511mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Ione, during December, snow falls for 20.7 days and regularly aggregates up to 10.47" (266mm) of snow. Throughout the year, there are 95.8 snowfall days, and 50.39" (1280mm) of snow is accumulated.Daylight
The month with the shortest days in Ione is December, with an average of 8h and 18min of daylight.On the first day of December, sunrise is at 7:22 am and sunset at 3:55 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 4:03 pm PST.
Sunshine
In Ione, the average sunshine in December is 3.5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ione, WA
- Average high temperature in December: 26.6°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in December: 15.3°F
The month with the highest average low temperature is August (46.6°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in December
Ione, WA
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Ione, WA
- Average wind speed in December: 3.2mph
The windiest months (with the highest average wind speed) are April, May and June (3.9mph).
The calmest months (with the lowest average wind speed) are January and December (3.2mph).
Average humidity in December
Ione, WA
- Average humidity in December: 93%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Ione, WA
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is August (0.59").
Average rainfall days in December
Ione, WA
- Average rainfall days in December: 8.4 days
The month with the highest number of rainy days is April (18.5 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in December
Ione, WA
- Average snowfall in December: 10.47"
The month with the highest snowfall is January (11.77").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Ione, WA
- Average snowfall days in December: 20.7 days
The month with the highest number of snowfall days is December (20.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Ione, WA
- Average daylight in December: 8h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 3h and 30min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Ione, WA
- Average sunshine days in December: 10.1 days
The month with the most sunshine days is August (20.2 days).
The month with the least sunshine days is March (7.6 days).
Average UV index in December
Ione, WA
- 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, February, November and December (UV index 1).
Average cloud cover in December
Ione, WA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Ione, WA
- Average visibility in December: 3mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
