December weather forecastPleasant Hill, CA
December
Weather in December
December, the first month of the winter in Pleasant Hill, is also a moderate month, with an average temperature ranging between min 42.4°F (5.8°C) and max 55.6°F (13.1°C).Temperature
December is the month that records the lowest temperatures, with averages ranging from a high of 55.6°F (13.1°C) to a low of 42.4°F (5.8°C).Humidity
In December, the average relative humidity in Pleasant Hill, California, is 70%.Rainfall
In Pleasant Hill, in December, it is raining for 7.5 days, with typically 0.59" (15mm) of accumulated precipitation. In Pleasant Hill, during the entire year, the rain falls for 49.3 days and collects up to 3.82" (97mm) of precipitation.Daylight
The month with the shortest days in Pleasant Hill is December, with an average of 9h and 36min of daylight.On the first day of December in Pleasant Hill, sunrise is at 7:06 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:59 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.7h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Pleasant Hill, California. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 3 during December leads to these advisories:
Undertake precautions - Obligation exists to protect against skin and eye damage. To guard against the harmful effects of the Sun, minimize exposure during midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Pleasant Hill, CA
- Average high temperature in December: 55.6°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in December: 42.4°F
The month with the highest average low temperature is September (57.4°F).
The coldest month (with the lowest average low temperature) is January (42.3°F).
Average pressure in December
Pleasant Hill, CA
- Average pressure in December: 30.11"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
Pleasant Hill, CA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is May (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in December
Pleasant Hill, CA
- Average humidity in December: 70%
The months with the highest relative humidity are January and March (73%).
The month with the lowest relative humidity is September (56%).
Average rainfall in December
Pleasant Hill, CA
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in December
Pleasant Hill, CA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is August (0.5 days).
Average daylight in December /
Average sunshine in December
Pleasant Hill, CA
- Average daylight in December: 9h and 36min
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 36min).
- Average sunshine in December: 5h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Pleasant Hill, CA
- Average sunshine days in December: 22.2 days
The month with the most sunshine days is July (29.5 days).
The month with the least sunshine days is March (20 days).
Average UV index in December
Pleasant Hill, CA
- Average UV index in December: 3
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Pleasant Hill, CA
- Average cloud cover in December: 36
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in December
Pleasant Hill, 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).
