December weather forecastYermo, CA
December
Weather in December
December, the first month of the winter in Yermo, is still a cool month, with an average temperature fluctuating between 55°F (12.8°C) and 40.1°F (4.5°C).Temperature
In Yermo, the month of December registers the lowest temperatures, averaging 55°F (12.8°C) at the peak and 40.1°F (4.5°C) at the lowest.Humidity
The most humid month is December, with an average relative humidity of 47%.Rainfall
The month with the most rainfall in Yermo is December, when the rain falls for 4.6 days and typically aggregates up to 0.51" (13mm) of precipitation.Snowfall
In Yermo, snow does not fall in February through December.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 6:37 am and sunset at 4:35 pm. On the last day of December, sunrise is at 6:54 am and sunset at 4:46 pm PST.
Sunshine
In Yermo, the average sunshine in December is 7.2h.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 3 during December translates into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Yermo, CA
- Average high temperature in December: 55°F
The warmest month (with the highest average high temperature) is July (98.2°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in December
Yermo, 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 June (29.79"Hg).
Average wind speed in December
Yermo, CA
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is May (11.7mph).
The calmest month (with the lowest average wind speed) is January (6mph).
Average humidity in December
Yermo, CA
- Average humidity in December: 47%
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (21%).
Average rainfall in December
Yermo, CA
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is December (0.51").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Yermo, CA
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is December (4.6 days).
The month with the least rainy days is June (0.6 days).
Average snowfall in December
Yermo, CA
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Yermo, CA
- Average snowfall days in December: 0.3 days
The months with the highest number of snowfall days are January and December (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Yermo, CA
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 7h and 12min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).
Average sunshine days in December
Yermo, CA
- Average sunshine days in December: 25.4 days
The month with the most sunshine days is June (29 days).
The month with the least sunshine days is February (23.5 days).
Average UV index in December
Yermo, CA
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Yermo, CA
- Average cloud cover in December: 18
The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 4).
Average visibility in December
Yermo, 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).
