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
Temperature readings reach their annual highs in December, averaging 32.5°F (0.3°C) and a minimum average of 21.6°F (-5.8°C).Humidity
In December, the average relative humidity in Declo is 79%.Rainfall
In Declo, in December, it is raining for 8.7 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, there are 105.2 rainfall days, and 10.63" (270mm) of precipitation is accumulated.Snowfall
Months with snowfall in Declo, Idaho, are January through May, September through December. December is the month with the most snowfall in Declo. Snow falls for 13 days and accumulates 6.54" (166mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:45 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 8:04 am and sunset at 5:11 pm MST.
Sunshine
The average sunshine in December is 5.8h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Declo. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the coldest month in Declo?
How cold is December in Declo?
What is the average humidity in December in Declo?
How much does it rain in Declo in December?
What is the snowiest month in Declo?
How many days does it snow in December in Declo?
What is the month with the shortest days in Declo?
What is the average length of the day in December in Declo?
When is the sunrise / sunset in December in Declo?
How many hours of sunshine does Declo have in December?
When is the lowest UV index in Declo?
How high is the UV index in December in Declo?
Average temperature in December
Declo, ID
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in December: 21.6°F
The months with the highest average low temperature are July and August (60.8°F).
The coldest month (with the lowest average low temperature) is December (21.6°F).
Average pressure in December
Declo, ID
- Average pressure in December: 30.24"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Declo, ID
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is January (7.1mph).
Average humidity in December
Declo, ID
- Average humidity in December: 79%
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (30%).
Average rainfall in December
Declo, ID
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is March (1.46").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
Declo, ID
- Average rainfall days in December: 8.7 days
The months with the highest number of rainy days are March and April (14 days).
The months with the least rainy days are July and August (5.2 days).
Average snowfall in December
Declo, ID
- Average snowfall in December: 6.54"
The month with the highest snowfall is December (6.54").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Declo, ID
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is December (13 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Declo, ID
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in December
Declo, ID
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is July (22.6 days).
The month with the least sunshine days is March (12 days).
Average UV index in December
Declo, ID
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Declo, ID
- Average cloud cover in December: 40
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Declo, ID
- 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).
Declo, Idaho, USA
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