December weather forecastGustine, CA
December
Weather in December
The first month of the winter, December, is still a mild month in Gustine, California, with an average temperature ranging between max 56.3°F (13.5°C) and min 41°F (5°C).Temperature
In Gustine, December records the lowest average temperatures, peaking at 56.3°F (13.5°C) and reaching a low of 41°F (5°C).Humidity
The average relative humidity in December is 70%.Rainfall
The month with the most rainfall is December, when the rain falls for 5.5 days and typically aggregates up to 0.83" (21mm) of precipitation.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 6:59 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:56 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.3h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 3 suggests this advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Gustine, CA
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in December: 41°F
The months with the highest average low temperature are July and August (61.9°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in December
Gustine, CA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Gustine, CA
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is January (4.4mph).
Average humidity in December
Gustine, CA
- Average humidity in December: 70%
The month with the highest relative humidity is January (71%).
The month with the lowest relative humidity is July (38%).
Average rainfall in December
Gustine, CA
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is December (0.83").
The driest months (with the least rainfall) are June, August and September (0.04").
Average rainfall days in December
Gustine, CA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (0.7 days).
Average daylight in December /
Average sunshine in December
Gustine, CA
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 18min
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 18min).
Average sunshine days in December
Gustine, CA
- Average sunshine days in December: 24.5 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (22.3 days).
Average UV index in December
Gustine, CA
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Gustine, CA
- Average cloud cover in December: 31
The months with the most cloud cover are March and December (Cloud cover 31).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in December
Gustine, 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).
