December weather forecastHighland, CA
December
Weather in December
The first month of the winter, December, is still a mild month in Highland, California, with an average temperature ranging between max 57.7°F (14.3°C) and min 41.5°F (5.3°C).Temperature
Highland notes the coldest temperatures in December, with a high average of 57.7°F (14.3°C) and a low of 41.5°F (5.3°C).Humidity
In Highland, the average relative humidity in December is 51%.Rainfall
December is the month with the most rainfall. Rain falls for 6.8 days and accumulates 1.42" (36mm) of precipitation.Snowfall
In Highland, snow does not fall in January, March through December.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:37 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:49 pm PST.
Sunshine
With an average of 6.9h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 3 during December translates into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Highland, CA
- Average high temperature in December: 57.7°F
The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is December (57.7°F).
- Average low temperature in December: 41.5°F
The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (41.5°F).
Average pressure in December
Highland, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Highland, CA
- Average wind speed in December: 5.4mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is September (4.8mph).
Average humidity in December
Highland, CA
- Average humidity in December: 51%
The month with the highest relative humidity is February (52%).
The month with the lowest relative humidity is August (36%).
Average rainfall in December
Highland, CA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Highland, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.3 days).
Average snowfall days in December
Highland, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Highland, 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 month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
Highland, CA
- Average sunshine days in December: 22.9 days
The month with the most sunshine days is June (28.5 days).
The month with the least sunshine days is February (20.9 days).
Average UV index in December
Highland, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Highland, CA
- Average cloud cover in December: 21
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Highland, 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).
