December weather forecast
Harmony, CA

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Weather in December

December, the first month of the winter in Harmony, is still a mild month, with an average temperature ranging between min 48.2°F and max 59.4°F.

Temperature

In Harmony, December is the month with the lowest recorded average temperatures, measuring a high of 59.4°F and a low of 48.2°F.

Humidity

In Harmony, the average relative humidity in December is 67%.

Rainfall

The months with the most rainfall in Harmony are March and December, with an average 1.3" of precipitation.

Daylight

The month with the shortest days is December, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:13 am and sunset at 5:01 pm PST.

Sunshine

With an average of 6.3h of sunshine, December has the least sunshine of the year.

UV index

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Harmony. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 4 in December interprets into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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FAQ

What is the coldest time of year in Harmony?

The lowest temperatures in Harmony are recorded in December, with averages reaching a high of 59.4°F and a low of 48.2°F.

What are the temperatures in Harmony in December?

During December, Harmony experiences an average high-temperature of 59.4°F and a low-temperature of 48.2°F.

What is the average humidity in December in Harmony?

In December, the average relative humidity in Harmony is 67%.

What is the wettest month in Harmony?

The wettest months in Harmony are March and December, with an average 1.3" of rainfall.

How many days does it rain in December in Harmony?

In Harmony, in December, it is raining for 6.5 days, with typically 1.3" of accumulated precipitation.

What is the month with the shortest days in Harmony?

December has the shortest days of the year, with an average of 9h and 48min of daylight.

What is the average length of the day in December in Harmony?

In Harmony, the average day length in December is 9h and 49min.

When is the sunrise / sunset in December in Harmony?

On the first day of December in Harmony, California, sunrise is at 6:54 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:01 pm PST.

What is the month with the least sunshine in Harmony?

December has the least sunshine of the year, with an average of 6.3h of sunshine.

How many hours of sunshine does Harmony have in December?

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

When is the lowest UV index in Harmony?

The months with the lowest UV index in Harmony, California, are January through March, November and December, with an average maximum UV index of 4.

What is the UV index reading in December in Harmony?

In December, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Harmony, CA

Average temperature in December - Harmony, CA
  • Average high temperature in December: 59.4°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 (59.4°F).

  • Average low temperature in December: 48.2°F

The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (47.8°F).

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Average pressure in December
Harmony, CA

Average pressure in December - Harmony, CA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.91"Hg).

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Average wind speed in December
Harmony, CA

Average wind speed in December - Harmony, CA
  • Average wind speed in December: 6.9mph

The windiest month (with the highest average wind speed) is May (8.6mph).
The calmest months (with the lowest average wind speed) are July, August, September, October and November (6.5mph).

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Average humidity in December
Harmony, CA

Average humidity in December - Harmony, CA
  • Average humidity in December: 67%

The month with the highest relative humidity is March (71%).
The month with the lowest relative humidity is October (61%).

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Average rainfall in December
Harmony, CA

Average rainfall in December - Harmony, CA
  • Average rainfall in December: 1.3"

The wettest months (with the highest rainfall) are March and December (1.3").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in December
Harmony, CA

Average rainfall days in December - Harmony, CA
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is March (8.5 days).
The month with the least rainy days is August (0.8 days).

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Average daylight in December /
Average sunshine in December
Harmony, CA

Average daylight in December / Average sunshine in December - Harmony, 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 month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

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Average sunshine days in December
Harmony, CA

Average sunshine days in December - Harmony, CA
  • Average sunshine days in December: 23.8 days

The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (21.2 days).

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Average UV index in December
Harmony, CA

Average UV index in December - Harmony, CA
  • Average UV index in December: 4

The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in December
Harmony, CA

Average cloud cover in December - Harmony, CA
  • Average cloud cover in December: 27

The month with the most cloud cover is March (Cloud cover 28).
The months with the least cloud cover are July, August and September (Cloud cover 8).

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Average visibility in December
Harmony, CA

Average visibility in December - Harmony, 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).

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Harmony, California, USA

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