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 sea temperature 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
The coldest time of the year is December, with temperatures averaging a high of 61.2°F (16.2°C) and a low of 46.8°F (8.2°C).Humidity
The average relative humidity in December in Pismo Beach is 63%.Rainfall
In Pismo Beach, during December, the rain falls for 6.4 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Pismo Beach, during the entire year, the rain falls for 47.6 days and collects up to 6.93" (176mm) of precipitation.Ocean temperature
In Pismo Beach, California, the average seawater temperature in December is 57.6°F (14.2°C).Note: With an efficient thermal swimsuit, one can navigate 57.6°F (14.2°C) even if it's colder than 50°F (10°C); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 55.4°F (13°C) feels chilly.
Daylight
December has the shortest days of the year, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 6:53 am and sunset at 4:50 pm. On the last day of December, in Pismo Beach, sunrise is at 7:10 am and sunset at 5:01 pm PST.
Sunshine
The months with the least sunshine in Pismo Beach are February and December, with an average of 6.5h of sunshine.UV index
The months with the lowest UV index in Pismo Beach are January through March, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The UV index of 4 during December translates into the following guidance:
Put precautions into practice - Protective measures against sun-induced damage are advised. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Frequently asked questions
What are the coldest months in Pismo Beach?
What is the usual temperature for Pismo Beach in December?
What is the average humidity in December in Pismo Beach?
How many days does it rain in December in Pismo Beach?
How cold is the water in December in Pismo Beach?
What is the month with the shortest days in Pismo Beach?
What is the average length of the day in December in Pismo Beach?
When are sunrise and sunset in December in Pismo Beach?
What are the months with the least sunshine in Pismo Beach?
How long on average sun shines in December in Pismo Beach?
What are the months with the lowest UV index in Pismo Beach?
How high is the UV index in December in Pismo Beach?
Average temperature in December
Pismo Beach, CA
- Average high temperature in December: 61.2°F
The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in December: 46.8°F
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in December
Pismo Beach, CA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in December
Pismo Beach, CA
- Average wind speed in December: 6.5mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Pismo Beach, CA
- Average humidity in December: 63%
The month with the highest relative humidity is March (68%).
The month with the lowest relative humidity is October (58%).
Average rainfall in December
Pismo Beach, CA
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in December
Pismo Beach, CA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).
Average sea temperature in December
Pismo Beach, CA
- Average sea temperature in December: 57.5°F
The best months for swimming (with the highest average sea temperature) are August and October (58.6°F).
The coldest month (with the lowest average sea temperature) is April (54.3°F).
Average daylight in December /
Average sunshine in December
Pismo Beach, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 3min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days in December
Pismo Beach, CA
- Average sunshine days in December: 24 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).
Average UV index in December
Pismo Beach, CA
- Average UV index in December: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in December
Pismo Beach, CA
- Average cloud cover in December: 25
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Pismo Beach, 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).
Pismo Beach, California, USA
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