December weather forecast and climate
Sierra Vista, CA

Weather in December

December, the first month of the winter, in Sierra Vista, is also a moderate month, with average temperature fluctuating between 41.9°F (5.5°C) and 56.3°F (13.5°C).

Temperature

December is the coldest month, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 41.9°F (5.5°C).

Humidity

The average relative humidity in December is 67%.

Rainfall

In December, in Sierra Vista, the rain falls for 7 days. Throughout December, 1.3" (33mm) of precipitation is accumulated. Throughout the year, there are 51 rainfall days, and 7.56" (192mm) of precipitation is accumulated.

Daylight

With an average of 9.6h of daylight, December has the shortest days of the year in Sierra Vista.

Sunshine

December has the least sunshine of the year, with an average of 6.2h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Sierra Vista. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 3 transform into the following instructions:
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. 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.
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FAQ

What is the coldest month in Sierra Vista?

The coldest month is December, with an average high-temperature of 56.3°F (13.5°C) and an average low-temperature of 41.9°F (5.5°C).

What is the average humidity in December in Sierra Vista?

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

How many days does it rain in December in Sierra Vista?

In Sierra Vista, in December, during 7 rainfall days, 1.3" (33mm) of precipitation is typically accumulated.

What is the month with the shortest days in Sierra Vista?

With an average of 9.6h of daylight, December has the shortest days of the year.

How many hours of daylight does Sierra Vista have in December?

In December, the average length of the day in Sierra Vista is 9.6h.

What is the month with the least sunshine in Sierra Vista?

With an average of 6.2h of sunshine, December has the least sunshine of the year in Sierra Vista.

How long on average sun shines in December in Sierra Vista?

In Sierra Vista, California, the average sunshine in December is 6.2h.

What is the month with the lowest UV index in Sierra Vista?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Sierra Vista.

What is the UV index intensity in December in Sierra Vista?

The average daily maximum UV index in December in Sierra Vista, California, is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.

Average temperature in December
Sierra Vista, CA

Average temperature in December - Sierra Vista, CA
  • Average high temperature in December: 56.3°F

The warmest month (with the highest average high temperature) is July (100°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in December: 41.9°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

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Average pressure in December
Sierra Vista, CA

Average pressure in December - Sierra Vista, CA
  • Average pressure in December: 30.12"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in December
Sierra Vista, CA

Average wind speed in December - Sierra Vista, CA
  • Average wind speed in December: 5mph

The windiest month (with the highest average wind speed) is June (7.9mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

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Average humidity in December
Sierra Vista, CA

Average humidity in December - Sierra Vista, CA
  • Average humidity in December: 67%

The month with the highest relative humidity is January (68%).
The month with the lowest relative humidity is July (31%).

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Average rainfall in December
Sierra Vista, CA

Average rainfall in December - Sierra Vista, CA
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is March (1.46").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in December
Sierra Vista, CA

Average rainfall days in December - Sierra Vista, CA
  • Average rainfall days in December: 7 days

The month with the highest number of rainy days is March (8.6 days).
The month with the least rainy days is June (0.8 days).

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Average daylight in December /
Average sunshine in December
Sierra Vista, CA

Average daylight in December / Average sunshine in December - Sierra Vista, CA
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 6.2h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.2h).

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Average sunshine days in December
Sierra Vista, CA

Average sunshine days in December - Sierra Vista, CA
  • Average sunshine days in December: 23.3 days

The month with the most sunshine days is June (28.8 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in December
Sierra Vista, CA

Average UV index in December - Sierra Vista, CA
  • Average UV index in December: 3

Months with the highest UV index are June, July and August (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
Sierra Vista, CA

Average cloud cover in December - Sierra Vista, CA
  • Average cloud cover in December: 30

Months with the most cloud cover are March and December (Cloud cover 30).
Months with the least cloud cover are July, August and September (Cloud cover 5).

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Average visibility in December
Sierra Vista, CA

Average visibility in December - Sierra Vista, 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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