December weather forecastMontebello, CA
December
Weather in December
December, the first month of the winter in Montebello, is still a refreshing month, with an average temperature fluctuating between 64.9°F (18.3°C) and 49.6°F (9.8°C).Temperature
Montebello's December weather, marked by an average high temperature of 64.9°F (18.3°C) and an average low temperature of 49.6°F (9.8°C), is the coldest in the year.Humidity
In December, the average relative humidity in Montebello is 52%.Rainfall
December is the month with the most rainfall in Montebello, California. Rain falls for 5.2 days and accumulates 1.3" (33mm) of precipitation.Daylight
December has the shortest days of the year in Montebello, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 6:40 am and sunset at 4:43 pm. On the last day of December, in Montebello, sunrise is at 6:57 am and sunset at 4:53 pm PST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 6.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high UV index of 4 in December translates into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Montebello, CA
- Average high temperature in December: 64.9°F
The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (64.9°F).
- Average low temperature in December: 49.6°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in December
Montebello, 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 (29.88"Hg).
Average wind speed in December
Montebello, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.7mph).
Average humidity in December
Montebello, CA
- Average humidity in December: 52%
The month with the highest relative humidity is June (62%).
The month with the lowest relative humidity is November (48%).
Average rainfall in December
Montebello, CA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Montebello, CA
- Average rainfall days in December: 5.2 days
The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is June (1.2 days).
Average daylight in December /
Average sunshine in December
Montebello, 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 48min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in December
Montebello, CA
- Average sunshine days in December: 24.4 days
The month with the most sunshine days is August (27.6 days).
The month with the least sunshine days is February (22.5 days).
Average UV index in December
Montebello, CA
- Average UV index in December: 4
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in December
Montebello, CA
- Average cloud cover in December: 22
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Montebello, 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).
