December weather forecastNorth Fontana, CA
December
Weather in December
December, the first month of the winter in North Fontana, is still a refreshing month, with an average temperature fluctuating between 60.8°F (16°C) and 44.2°F (6.8°C).Temperature
December is North Fontana's coldest month, registering average high temperatures of 60.8°F (16°C) and lows of 44.2°F (6.8°C).Humidity
In December, the average relative humidity is 51%.Rainfall
In December, the rain falls for 5.9 days. Throughout December, 1.5" (38mm) of precipitation is accumulated. Throughout the year, in North Fontana, there are 48.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year in North Fontana.On the first day of December in North Fontana, sunrise is at 6:38 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:50 pm PST.
Sunshine
With an average of 6.9h of sunshine, December has the least sunshine of the year in North Fontana.UV index
December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum UV index of 3 in December translates into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
North Fontana, CA
- Average high temperature in December: 60.8°F
The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is December (60.8°F).
- Average low temperature in December: 44.2°F
The month with the highest average low temperature is August (67.3°F).
The coldest months (with the lowest average low temperature) are February and December (44.2°F).
Average pressure in December
North Fontana, 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 (29.85"Hg).
Average wind speed in December
North Fontana, CA
- Average wind speed in December: 5.3mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in December
North Fontana, CA
- Average humidity in December: 51%
The months with the highest relative humidity are February, March and May (52%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
North Fontana, CA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is February (1.57").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
North Fontana, CA
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days in December
North Fontana, 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
North Fontana, 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 6min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in December
North Fontana, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.1 days).
Average UV index in December
North Fontana, CA
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
North Fontana, CA
- Average cloud cover in December: 21
The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in December
North Fontana, 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).
