December weather forecast and climate
Humboldt Hill, CA

Weather in December

December, the first month of the winter, in Humboldt Hill, is still a cool month, with average temperature varying between 42.1°F (5.6°C) and 52.7°F (11.5°C).

Temperature

December is the coldest month, with an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 42.1°F (5.6°C).

Humidity

The average relative humidity in December is 79%.

Rainfall

December is the month with the most rainfall in Humboldt Hill. Rain falls for 15.2 days and accumulates 5.31" (135mm) of precipitation.

Snowfall

January, March through December are months without snowfall in Humboldt Hill, California.

Daylight

The month with the shortest days in Humboldt Hill is December, with an average of 9.3h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 5.2h of sunshine.

UV index

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Humboldt Hill?

December is the coldest month, with an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 42.1°F (5.6°C).

What is the temperature in December in Humboldt Hill?

In December, in Humboldt Hill, California, the average high-temperature is 52.7°F (11.5°C), and the average low-temperature is 42.1°F (5.6°C).

What is the average humidity in December in Humboldt Hill?

In Humboldt Hill, California, the average relative humidity in December is 79%.

How many days does it rain in December in Humboldt Hill?

In Humboldt Hill, California, in December, during 15.2 rainfall days, 5.31" (135mm) of precipitation is typically accumulated.

What is the wettest month in Humboldt Hill?

The month with the most rainfall is December when the rain falls for 15.2 days and typically aggregates up to 5.31" (135mm) of precipitation.

When it does not snow in Humboldt Hill?

In Humboldt Hill, California, snow does not fall in January, March through December.

What is the month with the shortest days in Humboldt Hill?

The month with the shortest days is December, with an average of 9.3h of daylight.

What is the average length of the day in December in Humboldt Hill?

The average length of the day in December in Humboldt Hill, California, is 9.3h.

What is the month with the least sunshine in Humboldt Hill?

With an average of 5.2h of sunshine, December has the least sunshine of the year.

How long on average sun shines in December in Humboldt Hill?

In Humboldt Hill, California, the average sunshine in December is 5.2h.

When is the lowest UV index in Humboldt Hill?

January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Humboldt Hill, California.

What is the UV index intensity in December in Humboldt Hill?

The average daily maximum UV index in December in Humboldt Hill, California, is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in December
Humboldt Hill, CA

Average temperature in December - Humboldt Hill, CA
  • Average high temperature in December: 52.7°F

The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is December (52.7°F).

  • Average low temperature in December: 42.1°F

The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (41.9°F).

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Average pressure in December
Humboldt Hill, CA

Average pressure in December - Humboldt Hill, CA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is August (29.96").

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Average wind speed in December
Humboldt Hill, CA

Average wind speed in December - Humboldt Hill, CA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in December
Humboldt Hill, CA

Average humidity in December - Humboldt Hill, CA
  • Average humidity in December: 79%

The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in December
Humboldt Hill, CA

Average rainfall in December - Humboldt Hill, CA
  • Average rainfall in December: 5.31"

The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in December
Humboldt Hill, CA

Average rainfall days in December - Humboldt Hill, CA
  • Average rainfall days in December: 15.2 days

The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (2.1 days).

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Average snowfall in December
Humboldt Hill, CA

Average snowfall in December - Humboldt Hill, CA
  • Average snowfall in December: 0"

The month with the highest snowfall is February (0.39").
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in December
Humboldt Hill, CA

Average snowfall days in December - Humboldt Hill, CA
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is February (0.3 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in December /
Average sunshine in December
Humboldt Hill, CA

Average daylight in December / Average sunshine in December - Humboldt Hill, CA
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 5.2h).

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Average sunshine days in December
Humboldt Hill, CA

Average sunshine days in December - Humboldt Hill, CA
  • Average sunshine days in December: 14.7 days

The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (12.1 days).

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Average UV index in December
Humboldt Hill, CA

Average UV index in December - Humboldt Hill, CA
  • Average UV index in December: 3

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 3).

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Average cloud cover in December
Humboldt Hill, CA

Average cloud cover in December - Humboldt Hill, CA
  • Average cloud cover in December: 43

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in December
Humboldt Hill, CA

Average visibility in December - Humboldt Hill, CA
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).

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