December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average daylight in December
Average sunshine in December

Mount Lemmon Ski Valley from atop the Mount Lemmon, Arizona

Weather in December

December weather in Mount Lemmon, Arizona, encapsulates the arrival of the year-end winter cycle. With temperatures dropping to their yearly lows, the environment exudes a cozy, holiday spirit. Snowfall plays a major role, accumulating to 11" (279mm) and transforming the landscape into a winter wonderland. January will follow suit with similar frosty weather, while November in contrast, stands significantly warmer with lesser snowfall. Amidst the hush of winter, Mount Lemmon sparkles under the twinkling holiday lights, closing the annual weather cycle with a chill.

Temperature

In Mount Lemmon, the average high-temperature in December gently drops from a mild 56.3°F (13.5°C) in November to a cool 50.5°F (10.3°C). Despite drastic daily temperature oscillations, Mount Lemmon cools down to an average low-temperature of 24.3°F (-4.3°C) in December.

Rainfall

In Mount Lemmon, in December, during 5 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. Throughout the year, there are 59 rainfall days, and 29.57" (751mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. Throughout December, 10.98" (279mm) of snow is accumulated. In Mount Lemmon, during the entire year, snow aggregates up to 64.92" (1649mm).

Daylight

The month with the shortest days is December, with an average of 10h and 6min of daylight.
On the first day of the month, sunrise is at 7:07 am and sunset at 5:17 pm. On the last day of December, sunrise is at 7:24 am and sunset at 5:28 pm MST.

Sunshine

January and December, with an average of 7.8h of sunshine, are months with the least sunshine.

Updated: Jul 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

The high-temperature, in December, in Mount Lemmon, is 50.5°F (10.3°C), while the low-temperature averages to 24.3°F (-4.3°C).

How much does it rain in December?

In December, in Mount Lemmon, Arizona, the rain falls for 5 days. Throughout December, 2.6" (66mm) of precipitation is accumulated.

How much does it snow in December?

Throughout December, 10.98" (279mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 10h and 6min of daylight.

How many hours of daylight does Mount Lemmon have in December?

The average day length in December is 10h and 4min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:28 pm MST.

What is the month with the least sunshine?

January and December, with an average of 7.8h of sunshine, are months with the least sunshine.

How many hours of sunshine does Mount Lemmon have in December?

In December, the average sunshine duration is 7.8h.

Today

Tomorrow

Long-term

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

Nov

December

Jan

Average high temperature

56.3°F 13.5°C

50.6°F 10.3°C

49.2°F 9.6°C

Average low temperature

Average rainfall

Average rainfall days

Average snowfall

Average daylight

Average sunshine

Average temperature in December
Mount Lemmon, AZ

Average high temperature in December: 50.6°F

The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is February (48.3°F).

Average low temperature in December: 24.3°F

The months with the highest average low temperature are July and August (49.8°F).
The coldest month (with the lowest average low temperature) is February (21.8°F).

Average rainfall in December
Mount Lemmon, AZ

Average rainfall in December: 2.6"

The wettest month (with the highest rainfall) is August (7").
The driest month (with the least rainfall) is May (0.3").

Average rainfall days in December
Mount Lemmon, AZ

Average rainfall days in December: 5 days

The month with the highest number of rainy days is August (11 days).
The months with the least rainy days are May and June (2 days).

Average snowfall in December
Mount Lemmon, AZ

Average snowfall in December: 11"

The month with the highest snowfall is February (20.4").
The months with the least snowfall are May, June, July, August and September (0").

Average daylight in December /
Average sunshine in December
Mount Lemmon, AZ

Average daylight in December: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

Average sunshine in December: 7h and 5min

The month with the most sunshine is June (Average sunshine: 12h and 24min).
The months with the least sunshine are January and December (Average sunshine: 7h and 48min).

December weather forecast
Mount Lemmon, AZ

Contents