December weather forecastToppenish, WA
December
Weather in December
The first month of the winter, December, is also an icy month in Toppenish, Washington, with an average temperature fluctuating between 25.7°F (-3.5°C) and 36.7°F (2.6°C).Temperature
Toppenish's coldest month, December, registers temperatures that range from a high of 36.7°F (2.6°C) to a low of 25.7°F (-3.5°C).Humidity
In Toppenish, the average relative humidity in December is 81%.Rainfall
In December, in Toppenish, the rain falls for 10.5 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. In Toppenish, Washington, during the entire year, the rain falls for 98.5 days and collects up to 6.97" (177mm) of precipitation.Snowfall
Months with snowfall are January through March, September, November and December. In Toppenish, during December, snow falls for 5 days and regularly aggregates up to 1.42" (36mm) of snow. In Toppenish, during the entire year, snow falls for 17.1 days and aggregates up to 6.69" (170mm) of snow.Daylight
With an average of 8h and 42min of daylight, December has the shortest days of the year in Toppenish.On the first day of December, sunrise is at 7:24 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:24 pm PST.
Sunshine
In Toppenish, the average sunshine in December is 5.7h.UV index
The months with the lowest UV index in Toppenish, Washington, are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 2 in December transforms into this advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Toppenish, WA
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (36.7°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is August (60.8°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in December
Toppenish, WA
- Average pressure in December: 30.14"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
Toppenish, WA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).
Average humidity in December
Toppenish, WA
- Average humidity in December: 81%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is July (38%).
Average rainfall in December
Toppenish, WA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is January (1.02").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in December
Toppenish, WA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in December
Toppenish, WA
- Average snowfall in December: 1.42"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in December
Toppenish, WA
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is December (5 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Toppenish, WA
- Average daylight in December: 8h and 42min
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: 5h and 42min
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
Toppenish, WA
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is February (14.6 days).
Average UV index in December
Toppenish, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Toppenish, WA
- Average cloud cover in December: 40
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in December
Toppenish, 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).
