December weather forecast and climate
Twain, CA

Weather in December

December, the first month of the winter, in Twain, is still a cold month, with average temperature ranging between min 23.4°F (-4.8°C) and max 39.2°F (4°C).

Temperature

December is the coldest month, with an average high-temperature of 39.2°F (4°C) and an average low-temperature of 23.4°F (-4.8°C).

Humidity

In Twain, the average relative humidity is 78%.

Rainfall

Months with the most rainfall in Twain are February and December, with an average 4.06" (103mm) of precipitation.

Snowfall

Months with snowfall in Twain are January through May, October through December. In Twain, during 7.8 snowfall days, 11.3" (287mm) of snow is typically accumulated. Throughout the year, in Twain, there are 37.7 snowfall days, and 56.02" (1423mm) of snow is accumulated.

Daylight

The month with the shortest days in Twain is December, with an average of 9.4h of daylight.

Sunshine

In December, the average sunshine in Twain, California, is 5.5h.

UV index

Months with the lowest UV index in Twain, California, are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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 Twain?

With an average high-temperature of 39.2°F (4°C) and an average low-temperature of 23.4°F (-4.8°C), December is the coldest month in Twain, California.

What is the temperature in December in Twain?

The average high-temperature, in December, in Twain, is 39.2°F (4°C), while the average low-temperature is 23.4°F (-4.8°C).

What is the average humidity in December in Twain?

In December, the average relative humidity is 78%.

How many days does it rain in December in Twain?

In December, the rain falls for 11.2 days. Throughout December, 4.06" (103mm) of precipitation is accumulated.

What is the wettest month in Twain?

Months with the most rainfall are February and December, with an average 4.06" (103mm) of precipitation.

How many days does it snow in December in Twain?

In December, in Twain, California, it is snowing for 7.8 days. Throughout December, 11.3" (287mm) of snow is accumulated.

What is the month with the shortest days in Twain?

December has the shortest days of the year, with an average of 9.4h of daylight.

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

In December, the average length of the day is 9.4h.

How many hours of sunshine does Twain have in December?

In December, the average sunshine in Twain, California, is 5.5h.

What is the month with the lowest UV index in Twain?

Months with the lowest UV index in Twain, California, are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Twain?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV rays.

Average temperature in December
Twain, CA

Average temperature in December - Twain, CA
  • Average high temperature in December: 39.2°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (39.2°F).

  • Average low temperature in December: 23.4°F

The month with the highest average low temperature is July (49.1°F).
The coldest month (with the lowest average low temperature) is December (23.4°F).

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Average pressure in December
Twain, CA

Average pressure in December - Twain, CA
  • Average pressure in December: 30.16"

The month with the highest atmospheric pressure is January (30.19").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in December
Twain, CA

Average wind speed in December - Twain, CA
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is March (6.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in December
Twain, CA

Average humidity in December - Twain, CA
  • Average humidity in December: 78%

Months with the highest relative humidity are January and March (81%).
The month with the lowest relative humidity is July (41%).

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Average rainfall in December
Twain, CA

Average rainfall in December - Twain, CA
  • Average rainfall in December: 4.06"

The wettest months (with the highest rainfall) are February and December (4.06").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in December
Twain, CA

Average rainfall days in December - Twain, CA
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.8 days).

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Average snowfall in December
Twain, CA

Average snowfall in December - Twain, CA
  • Average snowfall in December: 11.3"

The month with the highest snowfall is February (13.07").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Twain, CA

Average snowfall days in December - Twain, CA
  • Average snowfall days in December: 7.8 days

The month with the highest number of snowfall days is March (8.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Twain, CA
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.5h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 5.4h).

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Average sunshine days in December
Twain, CA

Average sunshine days in December - Twain, CA
  • Average sunshine days in December: 16.4 days

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in December
Twain, CA

Average UV index in December - Twain, CA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Twain, CA

Average cloud cover in December - Twain, CA
  • Average cloud cover in December: 40

The month with the most cloud cover is March (Cloud cover 45).
Months with the least cloud cover are July and August (Cloud cover 6).

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Average visibility in December
Twain, CA

Average visibility in December - Twain, CA
  • Average visibility in December: 5mi

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

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