December weather forecast and climate
Tempe, AZ

The Tempe Town Lake of Tempe City, Arizona
The Tempe Town Lake of Tempe City, Arizona

Weather in December

The first month of the winter, December, is also an enjoyable month in Tempe, Arizona, with average temperature fluctuating between 47.3°F (8.5°C) and 62.8°F (17.1°C).

Temperature

With an average high-temperature of 62.8°F (17.1°C) and an average low-temperature of 47.3°F (8.5°C), December is the coldest month.

Humidity

The most humid month is December, with an average relative humidity of 44%.

Rainfall

In December, the rain falls for 6.5 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. Throughout the year, in Tempe, there are 57.7 rainfall days, and 7.72" (196mm) of precipitation is accumulated.

Daylight

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

Sunshine

The month with the least sunshine is December, with an average of 6.8h of sunshine.

UV index

December is the month with the lowest UV index in Tempe, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the coldest month in Tempe?

With an average high-temperature of 62.8°F (17.1°C) and an average low-temperature of 47.3°F (8.5°C), December is the coldest month in Tempe.

What is the temperature in December in Tempe?

In December, in Tempe, the average high-temperature is 62.8°F (17.1°C), and the average low-temperature is 47.3°F (8.5°C).

What is the most humid month in Tempe?

With an average relative humidity of 44%, December is the most humid month.

What is the average humidity in December in Tempe?

In Tempe, the average relative humidity in December is 44%.

How much does it rain in Tempe in December?

In Tempe, Arizona, in December, it is raining for 6.5 days, with typically 0.87" (22mm) of accumulated precipitation.

What is the month with the shortest days in Tempe?

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

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

In Tempe, Arizona, the average length of the day in December is 10h.

What is the month with the least sunshine in Tempe?

With an average of 6.8h of sunshine, December has the least sunshine of the year in Tempe.

How long on average sun shines in December in Tempe?

In December, the average sunshine is 6.8h.

When is the lowest UV index in Tempe?

With an average maximum UV index of 3, December is the month with the lowest UV index in Tempe.

How high is the UV index in December in Tempe?

In Tempe, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in December
Tempe, AZ

Average temperature in December - Tempe, AZ
  • Average high temperature in December: 62.8°F

The warmest month (with the highest average high temperature) is July (102.6°F).
The month with the lowest average high temperature is December (62.8°F).

  • Average low temperature in December: 47.3°F

The month with the highest average low temperature is August (84.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).

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Average pressure in December
Tempe, AZ

Average pressure in December - Tempe, AZ
  • Average pressure in December: 30.06"

The month with the highest atmospheric pressure is January (30.09").
The month with the lowest atmospheric pressure is June (29.81").

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Average wind speed in December
Tempe, AZ

Average wind speed in December - Tempe, AZ
  • Average wind speed in December: 4.4mph

The windiest months (with the highest average wind speed) are April and May (6.3mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).

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Average humidity in December
Tempe, AZ

Average humidity in December - Tempe, AZ
  • Average humidity in December: 44%

The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (16%).

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Average rainfall in December
Tempe, AZ

Average rainfall in December - Tempe, AZ
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is July (1.14").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in December
Tempe, AZ

Average rainfall days in December - Tempe, AZ
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is June (1 days).

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Average daylight in December /
Average sunshine in December
Tempe, AZ

Average daylight in December / Average sunshine in December - Tempe, AZ
  • 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: 6.8h

Months with the most sunshine are June and August (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.8h).

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Average sunshine days in December
Tempe, AZ

Average sunshine days in December - Tempe, AZ
  • Average sunshine days in December: 24.1 days

The month with the most sunshine days is May (28.7 days).
The month with the least sunshine days is July (16.8 days).

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Average UV index in December
Tempe, AZ

Average UV index in December - Tempe, AZ
  • Average UV index in December: 3

Months with the highest UV index are May, June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Tempe, AZ

Average cloud cover in December - Tempe, AZ
  • Average cloud cover in December: 21

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in December
Tempe, AZ

Average visibility in December - Tempe, AZ
  • 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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