December weather forecastLemon Grove, CA
December
Weather in December
The first month of the winter, December, is also an enjoyable month in Lemon Grove, California, with an average temperature varying between 64.4°F (18°C) and 49.3°F (9.6°C).Temperature
December, having an average high-temperature of 64.4°F (18°C) and an average low-temperature of 49.3°F (9.6°C), is the coldest month.Humidity
In December, the average relative humidity is 59%.Rainfall
In Lemon Grove, in December, during 3.5 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, in Lemon Grove, there are 33 rainfall days, and 2.52" (64mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 6:33 am and sunset at 4:41 pm. On the last day of December, in Lemon Grove, California, sunrise is at 6:50 am and sunset at 4:52 pm PST.
Sunshine
February and December, with an average of 6.7h of sunshine, are months with the least 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 estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the UV index of 4 transforms into the following advice:
Take precautions - Protection against sun damage is advised. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lemon Grove, CA
- Average high temperature in December: 64.4°F
The warmest month (with the highest average high temperature) is August (82.9°F).
The month with the lowest average high temperature is December (64.4°F).
- Average low temperature in December: 49.3°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 (48.7°F).
Average pressure in December
Lemon Grove, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Lemon Grove, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is April (5.6mph).
The calmest month (with the lowest average wind speed) is October (4.5mph).
Average humidity in December
Lemon Grove, CA
- Average humidity in December: 59%
The month with the highest relative humidity is May (67%).
The month with the lowest relative humidity is November (54%).
Average rainfall in December
Lemon Grove, CA
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is February (0.55").
The driest months (with the least rainfall) are June, July and October (0.04").
Average rainfall days in December
Lemon Grove, CA
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is March (5.3 days).
The month with the least rainy days is June (0.8 days).
Average daylight in December /
Average sunshine in December
Lemon Grove, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 42min).
Average sunshine days in December
Lemon Grove, CA
- Average sunshine days in December: 26.7 days
The month with the most sunshine days is October (28.9 days).
The month with the least sunshine days is February (23.4 days).
Average UV index in December
Lemon Grove, CA
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in December
Lemon Grove, CA
- Average cloud cover in December: 24
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in December
Lemon Grove, 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).
