December weather forecast
Paso Robles, CA

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Sunrise over the Valley Oak vineyard farm in Paso Robles, California
Sunrise over the Valley Oak vineyard farm in Paso Robles, California

Weather in December

December, the first month of the winter in Paso Robles, is also a moderate month, with an average temperature ranging between max 58.3°F (14.6°C) and min 42.6°F (5.9°C).

Temperature

Paso Robles reaches its lowest average temperatures in December, measuring 58.3°F (14.6°C) at the peak and 42.6°F (5.9°C) at the lowest.

Humidity

In Paso Robles, the average relative humidity in December is 66%.

Rainfall

In Paso Robles, during December, the rain falls for 6.3 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, in Paso Robles, there are 46.4 rainfall days, and 4.49" (114mm) of precipitation is accumulated.

Daylight

With an average of 9h and 48min of daylight, December has the shortest days of the year in Paso Robles.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:49 pm. On the last day of December, in Paso Robles, sunrise is at 7:12 am and sunset at 4:59 pm PST.

Sunshine

February and December, with an average of 6.3h of sunshine, are months with the least sunshine in Paso Robles.

UV index

The months with the lowest UV index are February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 3 transforms into these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Frequently asked questions

What month is the coldest in Paso Robles?

Paso Robles's temperature records reveal December as the coldest month, marked by average highs of 58.3°F (14.6°C) and lows of 42.6°F (5.9°C).

What are December temperatures in Paso Robles?

In Paso Robles, in December, the average high-temperature is 58.3°F (14.6°C), and the average low-temperature is 42.6°F (5.9°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 84.2°F (29°C).

What is the average humidity in December in Paso Robles?

The average relative humidity in December is 66%.

How much does it rain in Paso Robles in December?

In Paso Robles, in December, during 6.3 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

What is the month with the shortest days in Paso Robles?

With an average of 9h and 48min of daylight, December has the shortest days of the year in Paso Robles.

How many hours of daylight does Paso Robles have in December?

In Paso Robles, the average day length in December is 9h and 47min.

When is the sunrise / sunset in December in Paso Robles?

On the first day of December, sunrise is at 6:54 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:59 pm PST.

What is the month with the least sunshine in Paso Robles?

February and December, with an average of 6.3h of sunshine, are months with the least sunshine in Paso Robles.

How many hours of sunshine does Paso Robles have in December?

In Paso Robles, California, the average sunshine duration in December is 6.3h.

What are the months with the lowest UV index in Paso Robles?

The months with the lowest UV index in Paso Robles are February, November and December, with an average maximum UV index of 3.

What is the UV index intensity in December in Paso Robles?

The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Paso Robles, CA

Average temperature in December - Paso Robles, CA
  • Average high temperature in December: 58.3°F

The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (58.3°F).

  • Average low temperature in December: 42.6°F

The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is February (42.4°F).

Average pressure in December
Paso Robles, CA

Average pressure in December - Paso Robles, CA
  • Average pressure in December: 30.1"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
Paso Robles, CA

Average wind speed in December - Paso Robles, CA
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).

Average humidity in December
Paso Robles, CA

Average humidity in December - Paso Robles, CA
  • Average humidity in December: 66%

The months with the highest relative humidity are February and March (68%).
The month with the lowest relative humidity is September (48%).

Average rainfall in December
Paso Robles, CA

Average rainfall in December - Paso Robles, CA
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is March (0.94").
The driest months (with the least rainfall) are June and August (0.04").

Average rainfall days in December
Paso Robles, CA

Average rainfall days in December - Paso Robles, CA
  • Average rainfall days in December: 6.3 days

The month with the highest number of rainy days is March (9.1 days).
The month with the least rainy days is August (0.7 days).

Average daylight in December /
Average sunshine in December
Paso Robles, CA

Average daylight in December / Average sunshine in December - Paso Robles, 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 2min

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 18min).

Average sunshine days in December
Paso Robles, CA

Average sunshine days in December - Paso Robles, CA
  • Average sunshine days in December: 24.1 days

The month with the most sunshine days is August (29.8 days).
The months with the least sunshine days are February and March (21 days).

Average UV index in December
Paso Robles, CA

Average UV index in December - Paso Robles, CA
  • Average UV index in December: 3

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).

Average cloud cover in December
Paso Robles, CA

Average cloud cover in December - Paso Robles, CA
  • Average cloud cover in December: 28

The month with the most cloud cover is March (Cloud cover 30).
The months with the least cloud cover are July and August (Cloud cover 5).

Average visibility in December
Paso Robles, CA

Average visibility in December - Paso Robles, 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).

Paso Robles, California, USA

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