December weather forecastEl Rio, CA
December
Weather in December
December, the first month of the winter in El Rio, is also a moderate month, with an average temperature fluctuating between 50.5°F (10.3°C) and 59.9°F (15.5°C).Temperature
As El Rio, California, enters December, the average high-temperature subtly lowers from the a comfortable 65.3°F (18.5°C) of November to a still refreshing 59.9°F (15.5°C). In December, the average low-temperature is a fresh 50.5°F (10.3°C).Humidity
In El Rio, the average relative humidity in December is 59%.Rainfall
In El Rio, California, in December, during 5.3 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. In El Rio, during the entire year, the rain falls for 46.5 days and collects up to 8.31" (211mm) of precipitation.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 6:45 am and sunset at 4:46 pm. On the last day of December, in El Rio, sunrise is at 7:02 am and sunset at 4:57 pm PST.
Sunshine
In December, the average sunshine in El Rio is 6.9h.UV index
January through April, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The average daily UV index of 4 in December transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
El Rio, CA
- Average high temperature in December: 59.9°F
The warmest months (with the highest average high temperature) are August and September (73.4°F).
The month with the lowest average high temperature is February (59°F).
- Average low temperature in December: 50.5°F
The month with the highest average low temperature is September (63°F).
The coldest months (with the lowest average low temperature) are February and December (50.5°F).
Average pressure in December
El Rio, CA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.9"Hg).
Average wind speed in December
El Rio, CA
- Average wind speed in December: 6.7mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
El Rio, CA
- Average humidity in December: 59%
The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (57%).
Average rainfall in December
El Rio, CA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is January (1.85").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
El Rio, CA
- Average rainfall days in December: 5.3 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is August (1.3 days).
Average daylight in December /
Average sunshine in December
El Rio, CA
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 54min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 48min).
Average sunshine days in December
El Rio, CA
- Average sunshine days in December: 24.9 days
The month with the most sunshine days is October (27.2 days).
The month with the least sunshine days is February (21.7 days).
Average UV index in December
El Rio, CA
- Average UV index in December: 4
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in December
El Rio, CA
- Average cloud cover in December: 21
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
El Rio, 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).
