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 is the month when Walnut Grove sees the lowest average temperatures, with a high of 43.7°F (6.5°C) and a low of 34°F (1.1°C).Humidity
In December, the average relative humidity in Walnut Grove is 83%.Rainfall
December is the month with the most rainfall. Rain falls for 19.6 days and accumulates 5.08" (129mm) of precipitation.Snowfall
Months with snowfall in Walnut Grove are January through March, November and December. In Walnut Grove, during December, snow falls for 0.6 days and regularly aggregates up to 0.35" (9mm) of snow. Throughout the year, there are 5.9 snowfall days, and 3.74" (95mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:31 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:50 am and sunset at 4:36 pm PST.
Sunshine
In Walnut Grove, the average sunshine in December is 4.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Walnut Grove. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
What part of the year is the coldest in Walnut Grove?
How cold is December in Walnut Grove?
What is the average humidity in December in Walnut Grove?
What is the wettest month in Walnut Grove?
How many days does it rain in December in Walnut Grove?
How many days does it snow in December in Walnut Grove?
What is the month with the shortest days in Walnut Grove?
What is the average length of the day in December in Walnut Grove?
When is the sunrise / sunset in December in Walnut Grove?
How long on average sun shines in December in Walnut Grove?
When is the lowest UV index in Walnut Grove?
What is the UV index intensity in December in Walnut Grove?
Average temperature in December
Walnut Grove, WA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is August (80.6°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure in December
Walnut Grove, WA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Walnut Grove, WA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Walnut Grove, WA
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall in December
Walnut Grove, WA
- Average rainfall in December: 5.08"
The wettest month (with the highest rainfall) is December (5.08").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Walnut Grove, WA
- Average rainfall days in December: 19.6 days
The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.9 days).
Average snowfall in December
Walnut Grove, WA
- Average snowfall in December: 0.35"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Walnut Grove, WA
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Walnut Grove, WA
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The months with the least sunshine are January and February (Average sunshine: 4h and 6min).
Average sunshine days in December
Walnut Grove, WA
- Average sunshine days in December: 9.9 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in December
Walnut Grove, WA
- 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, November and December (UV index 2).
Average cloud cover in December
Walnut Grove, WA
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Walnut Grove, WA
- Average visibility in December: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
Walnut Grove, Washington, USA
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