December weather forecastFish Rock, CA
December
Weather in December
The first month of the winter, December, is also a fresh month in Fish Rock, California, with an average temperature fluctuating between 39.9°F (4.4°C) and 54.7°F (12.6°C).Temperature
Temperature records mark December as the coldest month, with highs averaging 54.7°F (12.6°C) and lows at 39.9°F (4.4°C).Humidity
The average relative humidity in December is 76%.Rainfall
In Fish Rock, during December, the rain falls for 11.8 days and regularly aggregates up to 3.54" (90mm) of precipitation. Throughout the year, there are 83.1 rainfall days, and 21.38" (543mm) of precipitation is accumulated.Snowfall
In Fish Rock, snow does not fall in January, March through December.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Fish Rock.On the first day of the month, sunrise is at 7:14 am and sunset at 4:52 pm. On the last day of December, sunrise is at 7:32 am and sunset at 5:02 pm PST.
Sunshine
With an average of 5.4h of sunshine, December has the least sunshine of the year.UV index
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum high UV index of 3 in December translates into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fish Rock, CA
- Average high temperature in December: 54.7°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in December: 39.9°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (39.9°F).
Average pressure in December
Fish Rock, CA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in December
Fish Rock, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is May (6.8mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity in December
Fish Rock, CA
- Average humidity in December: 76%
The month with the highest relative humidity is March (78%).
The months with the lowest relative humidity are July and September (60%).
Average rainfall in December
Fish Rock, CA
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is February (4.49").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Fish Rock, CA
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is March (15 days).
The month with the least rainy days is August (0.9 days).
Average snowfall in December
Fish Rock, CA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.2").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Fish Rock, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.3 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
Fish Rock, CA
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 24min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in December
Fish Rock, CA
- Average sunshine days in December: 17.5 days
The months with the most sunshine days are July and August (29.6 days).
The month with the least sunshine days is March (14.6 days).
Average UV index in December
Fish Rock, CA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in December
Fish Rock, CA
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 6).
Average visibility in December
Fish Rock, 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).
