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, with average temperatures reaching a high of 32.5°F (0.3°C) and a low of 20.7°F (-6.3°C), is the coldest month.Humidity
The average relative humidity in December is 88%.Rainfall
In December, the rain falls for 6.6 days. Throughout December, 2.83" (72mm) of precipitation is accumulated. In Winchester, during the entire year, the rain falls for 133.5 days and collects up to 28.9" (734mm) of precipitation.Snowfall
Months with snowfall in Winchester are January through June, September through December. In Winchester, Idaho, during December, snow falls for 19.9 days and regularly aggregates up to 19.69" (500mm) of snow. In Winchester, during the entire year, snow falls for 112.2 days and aggregates up to 105.79" (2687mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 7:09 am and sunset at 4:02 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:10 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 4.2h of sunshine.UV index
February and December, with an average maximum UV index of 1, are months with the lowest UV index in Winchester, Idaho. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: During December, 1 as the daily maximum UV index converts into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is December in Winchester?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Winchester have in December?
When are sunrise and sunset in December in Winchester?
What is the month with the least sunshine?
How many hours of sunshine does Winchester have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Winchester, ID
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in December: 20.7°F
The month with the highest average low temperature is August (54.7°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in December
Winchester, ID
- Average pressure in December: 30.19"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in December
Winchester, ID
- Average wind speed in December: 4.7mph
The windiest months (with the highest average wind speed) are January, February, March and November (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in December
Winchester, ID
- Average humidity in December: 88%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (44%).
Average rainfall in December
Winchester, ID
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in December
Winchester, ID
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is April (17.8 days).
The month with the least rainy days is January (6 days).
Average snowfall in December
Winchester, ID
- Average snowfall in December: 19.69"
The month with the highest snowfall is February (23.11").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Winchester, ID
- Average snowfall days in December: 19.9 days
The month with the highest number of snowfall days is December (19.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Winchester, ID
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in December
Winchester, ID
- Average sunshine days in December: 10.7 days
The month with the most sunshine days is July (21.2 days).
The month with the least sunshine days is March (7.3 days).
Average UV index in December
Winchester, 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 February and December (UV index 1).
Average cloud cover in December
Winchester, ID
- Average cloud cover in December: 57
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
Winchester, ID
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Winchester, Idaho, USA
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