December weather forecast and climate
Marysville, CA

Weather in December

December, the first month of the winter, in Marysville, is also a fresh month, with average temperature fluctuating between 54.5°F (12.5°C) and 41°F (5°C).

Temperature

With an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 41°F (5°C), December is the coldest month.

Humidity

The average relative humidity in December is 70%.

Rainfall

In December, in Marysville, the rain falls for 10 days. Throughout December, 1.85" (47mm) of precipitation is accumulated. Throughout the year, there are 69.8 rainfall days, and 10.79" (274mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Daylight

December has the shortest days of the year, with an average of 9.5h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 5.7h of sunshine.

UV index

Months with the lowest UV index in Marysville are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 3 in December transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Marysville?

With an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 41°F (5°C), December is the coldest month.

What is the temperature in December in Marysville?

The average high-temperature, in December, is 54.5°F (12.5°C), while the average low-temperature is 41°F (5°C).

What is the average humidity in December in Marysville?

In Marysville, California, the average relative humidity in December is 70%.

How many days does it rain in December in Marysville?

In Marysville, during December, the rain falls for 10 days and regularly aggregates up to 1.85" (47mm) of precipitation.

Does it snow in Marysville in December?

In Marysville, in December, it doesn't snow. In January, it regularly snows.

When it does not snow in Marysville?

February through December are months without snowfall in Marysville, California.

What is the month with the shortest days in Marysville?

With an average of 9.5h of daylight, December has the shortest days of the year.

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

In December, the average length of the day in Marysville, California, is 9.5h.

What is the month with the least sunshine in Marysville?

December has the least sunshine of the year in Marysville, with an average of 5.7h of sunshine.

How long on average sun shines in December in Marysville?

The average sunshine in December is 5.7h.

When is the lowest UV index in Marysville?

Months with the lowest UV index in Marysville are January, February, November and December, with an average maximum UV index of 3.

What is the UV index reading in December in Marysville?

In Marysville, California, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Marysville, CA

Average temperature in December - Marysville, CA
  • Average high temperature in December: 54.5°F

The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in December: 41°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (41°F).

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Average pressure in December
Marysville, CA

Average pressure in December - Marysville, CA
  • Average pressure in December: 30.13"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in December
Marysville, CA

Average wind speed in December - Marysville, CA
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.7mph).

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Average humidity in December
Marysville, CA

Average humidity in December - Marysville, CA
  • Average humidity in December: 70%

The month with the highest relative humidity is March (74%).
Months with the lowest relative humidity are July and September (38%).

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Average rainfall in December
Marysville, CA

Average rainfall in December - Marysville, CA
  • Average rainfall in December: 1.85"

The wettest month (with the highest rainfall) is March (2.17").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in December
Marysville, CA

Average rainfall days in December - Marysville, CA
  • Average rainfall days in December: 10 days

The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is July (0.9 days).

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Average snowfall in December
Marysville, CA

Average snowfall in December - Marysville, CA
  • Average snowfall in December: 0"

The month with the highest snowfall is January (0.2").
Months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in December
Marysville, CA

Average snowfall days in December - Marysville, CA
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in December / Average sunshine in December - Marysville, CA
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.7h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in December
Marysville, CA

Average sunshine days in December - Marysville, CA
  • Average sunshine days in December: 20.7 days

The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (16.8 days).

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Average UV index in December
Marysville, CA

Average UV index in December - Marysville, CA
  • Average UV index in December: 3

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Marysville, CA

Average cloud cover in December - Marysville, CA
  • Average cloud cover in December: 36

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in December
Marysville, CA

Average visibility in December - Marysville, CA
  • Average visibility in December: 6mi

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

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