December weather forecast and climate
Santee, CA

Weather in December

The first month of the winter, December, is also an enjoyable month in Santee, California, with average temperature varying between 47.5°F (8.6°C) and 64°F (17.8°C).

Temperature

December is the coldest month, with an average high-temperature of 64°F (17.8°C) and an average low-temperature of 47.5°F (8.6°C).

Humidity

In December, the average relative humidity in Santee is 59%.

Rainfall

In Santee, in December, during 4.9 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, there are 47.9 rainfall days, and 5.31" (135mm) of precipitation is accumulated.

Daylight

With an average of 10h of daylight, December has the shortest days of the year.

Sunshine

December has the least sunshine of the year, with an average of 6.7h of sunshine.

UV index

Months with the lowest UV index in Santee are January, February, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
[Resources]

FAQ

What is the coldest month in Santee?

With an average high-temperature of 64°F (17.8°C) and an average low-temperature of 47.5°F (8.6°C), December is the coldest month in Santee.

What is the temperature in December in Santee?

In Santee, California, in December, the average high-temperature is 64°F (17.8°C), and the average low-temperature is 47.5°F (8.6°C).

What is the average humidity in December in Santee?

In Santee, the average relative humidity in December is 59%.

How many days does it rain in December in Santee?

In December, in Santee, California, the rain falls for 4.9 days. Throughout December, 0.83" (21mm) of precipitation is accumulated.

What is the month with the shortest days in Santee?

December has the shortest days of the year in Santee, with an average of 10h of daylight.

How many hours of daylight does Santee have in December?

The average length of the day in December in Santee is 10h.

What is the month with the least sunshine in Santee?

The month with the least sunshine in Santee is December, with an average of 6.7h of sunshine.

How many hours of sunshine does Santee have in December?

The average sunshine in December in Santee, California, is 6.7h.

What are the months with the lowest UV index in Santee?

Months with the lowest UV index in Santee, California, are January, February, November and December, with an average maximum UV index of 4.

How high is the UV index in December in Santee?

The average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in December
Santee, CA

Average temperature in December - Santee, CA
  • Average high temperature in December: 64°F

The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (64°F).

  • Average low temperature in December: 47.5°F

The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is February (46.9°F).

[Resources]

Average pressure in December
Santee, CA

Average pressure in December - Santee, CA
  • Average pressure in December: 30.06"

The month with the highest atmospheric pressure is January (30.09").
Months with the lowest atmospheric pressure are June and September (29.87").

[Resources]

Average wind speed in December
Santee, CA

Average wind speed in December - Santee, CA
  • Average wind speed in December: 4.8mph

The windiest month (with the highest average wind speed) is April (5.4mph).
The calmest month (with the lowest average wind speed) is October (4.2mph).

[Resources]

Average humidity in December
Santee, CA

Average humidity in December - Santee, CA
  • Average humidity in December: 59%

The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (54%).

[Resources]

Average rainfall in December
Santee, CA

Average rainfall in December - Santee, CA
  • Average rainfall in December: 0.83"

The wettest month (with the highest rainfall) is February (1.14").
The driest month (with the least rainfall) is June (0.04").

[Resources]

Average rainfall days in December
Santee, CA

Average rainfall days in December - Santee, CA
  • Average rainfall days in December: 4.9 days

The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Santee, CA
  • Average daylight in December: 10h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 6.7h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

[Resources]

Average sunshine days in December
Santee, CA

Average sunshine days in December - Santee, CA
  • Average sunshine days in December: 24.7 days

The month with the most sunshine days is June (28 days).
The month with the least sunshine days is February (22.3 days).

[Resources]

Average UV index in December
Santee, CA

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

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 4).

[Resources]

Average cloud cover in December
Santee, CA

Average cloud cover in December - Santee, CA
  • Average cloud cover in December: 23

Months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).

[Resources]

Average visibility in December
Santee, CA

Average visibility in December - Santee, 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).

[Resources]