December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

The Tempe Town Lake of Tempe City, Arizona

Weather in December

December is known for its cooler temperatures in Tempe, with the thermometer generally fluctuating between 47.3°F (8.5°C) to 62.8°F (17.1°C). However, despite being the coolest month, the city still enjoys a significant amount of daylight and sunshine. The UV index is at its lowest for the year, suggested safety for outdoor activities without concern for harmful sun exposure. With a decent measure of almost 0.87" (22mm) of rain spread over 6.5 days, December wraps up the year with a semblance of a mild winter for Tempe.

Temperature

December stands out as Tempe's coldest month, with temperatures ranging between an average high of 62.8°F (17.1°C) and a low of 47.3°F (8.5°C).

Humidity

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

Rainfall

In Tempe, in December, it is raining for 6.5 days, with typically 0.87" (22mm) of accumulated precipitation. In Tempe, during the entire year, the rain falls for 57.7 days and collects up to 7.72" (196mm) of precipitation.

Daylight

December has the shortest days of the year, with an average of 10h and 0min of daylight.
On the first day of December, sunrise is at 7:14 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 5:30 pm MST.

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 estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 3 suggests this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.

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Frequently asked questions

What part of the year is the coldest in Tempe?

December is the coldest month of the year in Tempe, registering average temperatures as high as 62.8°F (17.1°C) and as low as 47.3°F (8.5°C).

What is the average December temperature in Tempe?

An average high-temperature, in December, in Tempe, 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?

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

What is the average humidity in December in Tempe?

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

How much does it rain in Tempe in December?

In Tempe, Arizona, in December, during 6.5 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

What is the month with the shortest days in Tempe?

With an average of 10h and 0min of daylight, December has the shortest days of the year.

How many hours of daylight does Tempe have in December?

The average day length in December is 9h and 59min.

When is the sunrise / sunset in December in Tempe?

In December, on the first day of the month, sunrise is at 7:14 am and sunset at 5:19 pm. On the last day of the month, in Tempe, Arizona, sunrise is at 7:31 am and sunset at 5:30 pm MST.

What is the month with the least sunshine in Tempe?

December has the least sunshine of the year, with an average of 6.8h of sunshine.

How long on average sun shines in December in Tempe?

In December, the average sunshine duration in Tempe 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.

How high is the UV index in December in Tempe?

In Tempe, Arizona, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

73.4°F 23°C

62.8°F 17.1°C

64°F 17.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.3mph 8.5km/h

4.8mph 7.7km/h

5mph 8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

26.4

24.1

Average UV index

Average cloud cover

Average visibility

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: 30.06"Hg

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

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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: 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: 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: 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: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

Average sunshine in December: 6h and 5min

The months with the most sunshine are June and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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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: 3

The 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: 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: 6mi

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

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December weather forecast
Tempe, AZ

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