December weather forecastHammond, OR
December
Weather in December
The first month of the winter, December, is still a chilly month in Hammond, Oregon, with an average temperature fluctuating between 46.4°F (8°C) and 41°F (5°C).Temperature
December is the coldest month, with the temperature often reaching an average high of 46.4°F (8°C) and an average low of 41°F (5°C).Humidity
March through May, October and December, with an average relative humidity of 81%, are the least humid months.Rainfall
The month with the most rainfall is December, when the rain falls for 21.2 days and typically aggregates up to 6.61" (168mm) of precipitation.Snowfall
In Hammond, snow does not fall in April through October and December.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 7:38 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:40 pm PST.
Sunshine
In Hammond, 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. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hammond, OR
- Average high temperature in December: 46.4°F
The warmest month (with the highest average high temperature) is August (64.6°F).
The month with the lowest average high temperature is December (46.4°F).
- Average low temperature in December: 41°F
The month with the highest average low temperature is August (55.6°F).
The coldest months (with the lowest average low temperature) are January and December (41°F).
Average pressure in December
Hammond, OR
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).
Average wind speed in December
Hammond, OR
- Average wind speed in December: 10.7mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Hammond, OR
- Average humidity in December: 81%
The month with the highest relative humidity is August (85%).
The months with the lowest relative humidity are March, April, May, October and December (81%).
Average rainfall in December
Hammond, OR
- Average rainfall in December: 6.61"
The wettest month (with the highest rainfall) is December (6.61").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
Hammond, OR
- Average rainfall days in December: 21.2 days
The month with the highest number of rainy days is December (21.2 days).
The month with the least rainy days is August (7.3 days).
Average snowfall in December
Hammond, OR
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days in December
Hammond, OR
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.3 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
Hammond, OR
- 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 12min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in December
Hammond, OR
- Average sunshine days in December: 8.8 days
The month with the most sunshine days is August (20.5 days).
The month with the least sunshine days is February (7.1 days).
Average UV index in December
Hammond, OR
- Average UV index in December: 2
The months with the highest UV index are May, June, July, August, September and October (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Hammond, OR
- Average cloud cover in December: 56
The months with the most cloud cover are January and February (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 36).
Average visibility in December
Hammond, OR
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
