December weather forecastGlenwood, WA
December
Weather in December
The first month of the winter, December, is also an icy month in Glenwood, Washington, with an average temperature fluctuating between 35.2°F (1.8°C) and 26.1°F (-3.3°C).Temperature
December, with its average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 26.1°F (-3.3°C), holds the record as the coldest month.Humidity
January, February and December, with an average relative humidity of 88%, are the most humid months.Rainfall
In December, the rain falls for 16.1 days. Throughout December, 4.61" (117mm) of precipitation is accumulated. Throughout the year, there are 152.5 rainfall days, and 26.93" (684mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Glenwood, in December, snow falls for 6.5 days, with typically accumulated 4.57" (116mm) of snow. Throughout the year, there are 23.9 snowfall days, and 18.74" (476mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 4:21 pm. On the last day of December, in Glenwood, sunrise is at 7:47 am and sunset at 4:30 pm PST.
Sunshine
In December, the average sunshine is 4h.UV index
In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
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 Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Glenwood, WA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (35.2°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).
Average pressure in December
Glenwood, WA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in December
Glenwood, WA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is June (6.4mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in December
Glenwood, WA
- Average humidity in December: 88%
The months with the highest relative humidity are January, February and December (88%).
The months with the lowest relative humidity are July and August (58%).
Average rainfall in December
Glenwood, WA
- Average rainfall in December: 4.61"
The wettest month (with the highest rainfall) is January (4.88").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
Glenwood, WA
- Average rainfall days in December: 16.1 days
The month with the highest number of rainy days is March (19.4 days).
The month with the least rainy days is August (3.8 days).
Average snowfall in December
Glenwood, WA
- Average snowfall in December: 4.57"
The month with the highest snowfall is January (6.22").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Glenwood, WA
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is December (6.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Glenwood, 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: 4h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Glenwood, WA
- Average sunshine days in December: 9.9 days
The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in December
Glenwood, 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 and February (UV index 1).
Average cloud cover in December
Glenwood, WA
- Average cloud cover in December: 60
The months with the most cloud cover are January and February (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in December
Glenwood, WA
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (4mi).
