Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December, known for its average high temperature of 58.8°F (14.9°C) and an average low temperature of 41.4°F (5.2°C), is the coldest month.Humidity
The average relative humidity in December is 51%.Rainfall
December is the month with the most rainfall in Mentone. Rain falls for 6.4 days and accumulates 1.42" (36mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
The month with the shortest days in Mentone is December, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:36 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
The month with the least sunshine is December, with an average of 6.8h of sunshine.UV index
With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Be vigilant - Suggestions to stave off sun damage are provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What are the coldest months in Mentone?
What are December temperatures in Mentone?
What is the average humidity in December in Mentone?
What is the wettest month in Mentone?
How much does it rain in Mentone in December?
When it does not snow in Mentone?
What is the month with the shortest days in Mentone?
What is the average length of the day in December in Mentone?
When is the sunrise / sunset in December in Mentone?
What is the month with the least sunshine in Mentone?
How long on average sun shines in December in Mentone?
What is the month with the lowest UV index in Mentone?
What is the UV index reading in December in Mentone?
Average temperature in December
Mentone, CA
- Average high temperature in December: 58.8°F
The warmest months (with the highest average high temperature) are July and August (90.3°F).
The month with the lowest average high temperature is December (58.8°F).
- Average low temperature in December: 41.4°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in December
Mentone, 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
Mentone, CA
- Average wind speed in December: 5.4mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity in December
Mentone, CA
- Average humidity in December: 51%
The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (37%).
Average rainfall in December
Mentone, 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
Mentone, CA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.3 days).
Average snowfall days in December
Mentone, 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
Mentone, CA
- Average daylight in December: 9h and 5min
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 5min
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 48min).
Average sunshine days in December
Mentone, CA
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is February (21.3 days).
Average UV index in December
Mentone, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Mentone, CA
- Average cloud cover in December: 22
The months with the most cloud cover are February, March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Mentone, 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).
Mentone, California, USA
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