December weather forecastKnowles, CA
December
Weather in December
December, the first month of the winter in Knowles, is still a chilly month, with temperature in the range of an average low of 32.9°F (0.5°C) and an average high of 48.9°F (9.4°C).Temperature
The coldest period tends to be December, when average temperatures fluctuate between a high of 48.9°F (9.4°C) and a low of 32.9°F (0.5°C).Humidity
The average relative humidity in December in Knowles is 64%.Rainfall
In Knowles, in December, it is raining for 7.9 days, with typically 2.76" (70mm) of accumulated precipitation. Throughout the year, there are 73.5 rainfall days, and 19.69" (500mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Knowles. In December, it is snowing for 1.3 days. Throughout December, 1.06" (27mm) of snow is accumulated. Throughout the year, in Knowles, California, there are 9.4 snowfall days, and 14.57" (370mm) of snow is accumulated.Daylight
The month with the shortest days in Knowles is December, with an average of 9h and 42min of daylight.On the first day of December in Knowles, sunrise is at 6:55 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:52 pm PST.
Sunshine
In December, the average sunshine is 6.4h.UV index
The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during December leads to these advisories:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Knowles, CA
- Average high temperature in December: 48.9°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is December (48.9°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (58.8°F).
The coldest months (with the lowest average low temperature) are February and December (32.9°F).
Average pressure in December
Knowles, CA
- 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 June (29.9"Hg).
Average wind speed in December
Knowles, CA
- Average wind speed in December: 4.3mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest months (with the lowest average wind speed) are November and December (4.3mph).
Average humidity in December
Knowles, CA
- Average humidity in December: 64%
The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are July and August (32%).
Average rainfall in December
Knowles, CA
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is February (3.54").
The driest month (with the least rainfall) is August (0.12").
Average rainfall days in December
Knowles, CA
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is August (2.1 days).
Average snowfall in December
Knowles, CA
- Average snowfall in December: 1.06"
The month with the highest snowfall is February (5.55").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Knowles, CA
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (3.4 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
Knowles, CA
- Average daylight in December: 9h and 42min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 6h and 24min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in December
Knowles, CA
- Average sunshine days in December: 21.9 days
The months with the most sunshine days are August and October (26.5 days).
The month with the least sunshine days is March (18.3 days).
Average UV index in December
Knowles, CA
- 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 February, November and December (UV index 2).
Average cloud cover in December
Knowles, CA
- Average cloud cover in December: 27
The month with the most cloud cover is March (Cloud cover 31).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in December
Knowles, CA
- 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).
