December weather forecastEmeryville, CA
December
Weather in December
December, the first month of the winter in Emeryville, is still a mild month, with an average temperature ranging between max 55.4°F (13°C) and min 44.6°F (7°C).Temperature
December, with average temperatures reaching a high of 55.4°F (13°C) and a low of 44.6°F (7°C), is the coldest month.Humidity
In Emeryville, the average relative humidity in December is 71%.Rainfall
In Emeryville, in December, during 7.5 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. Throughout the year, there are 55.6 rainfall days, and 5.24" (133mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:00 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.8h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 3 in December leads to these guidelines:
Act with care - The need to guard against sun damage is communicated. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Emeryville, CA
- Average high temperature in December: 55.4°F
The warmest month (with the highest average high temperature) is September (76.6°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in December: 44.6°F
The month with the highest average low temperature is September (56.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in December
Emeryville, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Emeryville, CA
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in December
Emeryville, CA
- Average humidity in December: 71%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (64%).
Average rainfall in December
Emeryville, CA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is February (1.1").
The driest months (with the least rainfall) are June, July, August and September (0.08").
Average rainfall days in December
Emeryville, CA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is March (8.7 days).
The month with the least rainy days is August (1.5 days).
Average daylight in December /
Average sunshine in December
Emeryville, CA
- Average daylight in December: 9h and 36min
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 36min).
- Average sunshine in December: 5h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Emeryville, CA
- Average sunshine days in December: 22.1 days
The month with the most sunshine days is October (26 days).
The month with the least sunshine days is February (20.5 days).
Average UV index in December
Emeryville, CA
- Average UV index in December: 3
The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Emeryville, CA
- Average cloud cover in December: 35
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in December
Emeryville, 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).
