December weather forecastNovato, CA
December
Weather in December
December, the first month of the winter in Novato, is also a fresh month, with an average temperature fluctuating between 55.2°F (12.9°C) and 43.9°F (6.6°C).Temperature
December, with its high-temperature average of 55.2°F (12.9°C) and a low-temperature average of 43.9°F (6.6°C), is the coldest month.Humidity
The average relative humidity in December is 74%.Rainfall
In Novato, during December, the rain falls for 9.5 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, in Novato, there are 68.4 rainfall days, and 7.28" (185mm) of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:26 am and sunset at 5:00 pm PST.
Sunshine
December has the least sunshine of the year in Novato, with an average of 5.6h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 3 in December translates into the following recommendations:
Exercise prevention - Warding off sunburn is urged. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Novato, CA
- Average high temperature in December: 55.2°F
The warmest month (with the highest average high temperature) is September (75.4°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in December: 43.9°F
The month with the highest average low temperature is September (55.8°F).
The coldest month (with the lowest average low temperature) is December (43.9°F).
Average pressure in December
Novato, CA
- Average pressure in December: 30.11"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
Novato, CA
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).
Average humidity in December
Novato, CA
- Average humidity in December: 74%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (66%).
Average rainfall in December
Novato, CA
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is February (1.65").
The driest months (with the least rainfall) are July, August and September (0.08").
Average rainfall days in December
Novato, CA
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is June (2 days).
Average daylight in December /
Average sunshine in December
Novato, 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 36min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in December
Novato, CA
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is October (24.9 days).
The month with the least sunshine days is March (18.5 days).
Average UV index in December
Novato, CA
- Average UV index in December: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Novato, CA
- Average cloud cover in December: 37
The month with the most cloud cover is March (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 14).
Average visibility in December
Novato, 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).
