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 its average high-temperature of 36°F (2.2°C) and an average low-temperature of 23.9°F (-4.5°C), holds the record as the coldest month.Humidity
In December, the average relative humidity in Pomona Heights is 82%.Rainfall
December is the month with the most rainfall in Pomona Heights, Washington. Rain falls for 9.2 days and accumulates 0.87" (22mm) of precipitation.Snowfall
Months with snowfall in Pomona Heights, Washington, are January through April, September, November and December. The month with the most snowfall in Pomona Heights is December, when snow falls for 5.7 days and typically aggregates up to 3.07" (78mm) of snow.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year in Pomona Heights.On the first day of the month, sunrise is at 7:26 am and sunset at 4:15 pm. On the last day of December, in Pomona Heights, sunrise is at 7:46 am and sunset at 4:24 pm PST.
Sunshine
The average sunshine in December in Pomona Heights is 5.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Pomona Heights. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 2 in December transforms into this advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What time of the year is the coldest in Pomona Heights?
How cold is it in Pomona Heights in December?
What is the average humidity in December in Pomona Heights?
What is the rainiest month in Pomona Heights?
How many days does it rain in December in Pomona Heights?
When does it snow the most in Pomona Heights?
How much does it snow in Pomona Heights in December?
What is the month with the shortest days in Pomona Heights?
How many hours of daylight does Pomona Heights have in December?
What time are sunrise and sunset in December in Pomona Heights?
How many hours of sunshine does Pomona Heights have in December?
What is the month with the lowest UV index in Pomona Heights?
What is the UV index reading in December in Pomona Heights?
Average temperature in December
Pomona Heights, WA
- Average high temperature in December: 36°F
The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (36°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in December
Pomona Heights, WA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in December
Pomona Heights, WA
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is June (7.4mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in December
Pomona Heights, WA
- Average humidity in December: 82%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (41%).
Average rainfall in December
Pomona Heights, WA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in December
Pomona Heights, WA
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall in December
Pomona Heights, WA
- Average snowfall in December: 3.07"
The month with the highest snowfall is December (3.07").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in December
Pomona Heights, WA
- Average snowfall days in December: 5.7 days
The month with the highest number of snowfall days is December (5.7 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Pomona Heights, WA
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 5h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in December
Pomona Heights, WA
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is February (15.5 days).
Average UV index in December
Pomona Heights, 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
Pomona Heights, WA
- Average cloud cover in December: 38
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in December
Pomona Heights, WA
- 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).
Pomona Heights, Washington, USA
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