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 snowfall in December
- Average snowfall days 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
In Healdsburg, the month of December registers the lowest temperatures, averaging 55°F (12.8°C) at the peak and 40.1°F (4.5°C) at the lowest.Humidity
In Healdsburg, the average relative humidity in December is 74%.Rainfall
In Healdsburg, during December, the rain falls for 11.5 days and regularly aggregates up to 3.43" (87mm) of precipitation. In Healdsburg, California, during the entire year, the rain falls for 81.2 days and collects up to 19.84" (504mm) of precipitation.Snowfall
In Healdsburg, snow does not fall in January, March through December.Daylight
The month with the shortest days in Healdsburg is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 4:50 pm. On the last day of December, in Healdsburg, California, sunrise is at 7:29 am and sunset at 5:00 pm PST.
Sunshine
The month with the least sunshine in Healdsburg is December, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index in Healdsburg are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In December, the UV index of 3 transforms into the following advice:
Be vigilant - A duty to shield skin and eyes from injury exists. Direct Sun exposure should be minimized especially during midday when radiation is most intense. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Frequently asked questions
What month is the coldest in Healdsburg?
What is the average December temperature in Healdsburg?
What is the average humidity in December in Healdsburg?
How many days does it rain in December in Healdsburg?
When it does not snow in Healdsburg?
What is the month with the shortest days in Healdsburg?
How many hours of daylight does Healdsburg have in December?
What time are sunrise and sunset in December in Healdsburg?
What is the month with the least sunshine in Healdsburg?
How many hours of sunshine does Healdsburg have in December?
What is the month with the lowest UV index in Healdsburg?
How high is the UV index in December in Healdsburg?
Average temperature in December
Healdsburg, CA
- Average high temperature in December: 55°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in December
Healdsburg, 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
Healdsburg, CA
- Average wind speed in December: 4.7mph
The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in December
Healdsburg, CA
- Average humidity in December: 74%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (57%).
Average rainfall in December
Healdsburg, CA
- Average rainfall in December: 3.43"
The wettest month (with the highest rainfall) is February (4.33").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Healdsburg, CA
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is March (14.2 days).
The month with the least rainy days is August (0.8 days).
Average snowfall in December
Healdsburg, CA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.04").
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
Healdsburg, CA
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 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
Healdsburg, CA
- Average daylight in December: 9h and 3min
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 4min
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 36min).
Average sunshine days in December
Healdsburg, CA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).
Average UV index in December
Healdsburg, 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 January, February, November and December (UV index 3).
Average cloud cover in December
Healdsburg, CA
- Average cloud cover in December: 38
The month with the most cloud cover is March (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 6).
Average visibility in December
Healdsburg, 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).
Healdsburg, California, USA
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