December weather forecastGridley, CA
December
Weather in December
The first month of the winter, December, is still a cool month in Gridley, California, with an average temperature ranging between max 54.5°F (12.5°C) and min 41°F (5°C).Temperature
Gridley witnesses the coldest weather in December, with temperatures averaging a high of 54.5°F (12.5°C) and a low of 41°F (5°C).Humidity
In Gridley, the average relative humidity in December is 68%.Rainfall
In December, in Gridley, California, the rain falls for 11.3 days. Throughout December, 3.7" (94mm) of precipitation is accumulated. Throughout the year, in Gridley, California, there are 81.5 rainfall days, and 21.34" (542mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall in Gridley, California.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of December in Gridley, California, sunrise is at 7:08 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:53 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.9h 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 value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 3 in December interprets into the following advice:
Heed the precautions - It is counselled to guard against solar damage. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Gridley, CA
- Average high temperature in December: 54.5°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 (54.5°F).
- Average low temperature in December: 41°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in December
Gridley, CA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Gridley, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).
Average humidity in December
Gridley, CA
- Average humidity in December: 68%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (35%).
Average rainfall in December
Gridley, CA
- Average rainfall in December: 3.7"
The wettest months (with the highest rainfall) are February and March (3.98").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in December
Gridley, CA
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (1.4 days).
Average snowfall in December
Gridley, CA
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.4").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Gridley, CA
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Gridley, CA
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
Gridley, CA
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is July (29.1 days).
The month with the least sunshine days is March (16 days).
Average UV index in December
Gridley, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Gridley, CA
- Average cloud cover in December: 35
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Gridley, 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).
