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 snowfall in December
Average snowfall 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 sun setting over Monterrey, Mexico with a far view of the Sierra Madre mountain ranges

Weather in December

December is the transition point into winter for Monterrey, and the weather is cooler with the lowest temperature further decreasing to 19.5°C (67.1°F). Surprisingly, December is the only month that records any snowfall, although very minimal, sparking a festive spirit for the holiday season. While the daylight hours shrink further, the number of sunshine days increases, showing the city's appeal under the winter sun. Moreover, the wind speed declines, adding to Monterrey's tranquil climate in December. Overall, residents and visitors alike can revel in a mild and inviting winter atmosphere, rounding off the year on a delightful note.

Temperature

The transition into December in Monterrey marks the average high-temperature at a refreshing 19.5°C (67.1°F), differing minimally from November's 21.5°C (70.7°F). Monterrey's temperature lowers to a mean of 9.5°C (49.1°F) during the nights in December.

Humidity

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

Rainfall

In Monterrey, in December, during 6 rainfall days, 14mm (0.55") of precipitation is typically accumulated. In Monterrey, during the entire year, the rain falls for 158.3 days and collects up to 602mm (23.7") of precipitation.

Snowfall

The only month with snowfall in Monterrey is December. December is the month with the most snowfall in Monterrey, Mexico. Snow falls for 0.1 days and accumulates 6mm (0.24") of snow.

Daylight

December has the shortest days of the year in Monterrey, Mexico, with an average of 10h and 36min of daylight.
On the first day of the month, sunrise is at 7:11 am and sunset at 5:50 pm. On the last day of December, in Monterrey, sunrise is at 7:27 am and sunset at 6:01 pm CST.

Sunshine

The average sunshine in December in Monterrey is 7.2h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: A daily high UV index of 4 in December leads to these guidelines:
Take precautions - Protection against sunburn is recommended. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.

[Resources]

Frequently asked questions

What is the usual temperature for Monterrey in December?

An average high-temperature, in December, in Monterrey, is 19.5°C (67.1°F) and the average low-temperature is 9.5°C (49.1°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, in September is evaluated at 30°C (86°F).

What is the average humidity in December in Monterrey?

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

How much does it rain in Monterrey in December?

In Monterrey, Mexico, in December, during 6 rainfall days, 14mm (0.55") of precipitation is typically accumulated.

What is the snowiest month in Monterrey?

December is the month with the most snowfall. Snow falls for 0.1 days and accumulates 6mm (0.24") of snow.

When does it start snowing in Monterrey?

December is the first month it typically snows in Monterrey, Mexico. Throughout December, in the average 0.1 snowfall days, it receives 6mm (0.24") of snow.

What is the month with the shortest days in Monterrey?

With an average of 10h and 36min of daylight, December has the shortest days of the year.

How many hours of daylight does Monterrey have in December?

The average day length in December in Monterrey is 10h and 34min.

What time are sunrise and sunset in December in Monterrey?

On the first day of December, sunrise is at 7:11 am and sunset at 5:50 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 6:01 pm CST.

How long on average sun shines in December in Monterrey?

In Monterrey, Mexico, the average sunshine duration in December is 7.2h.

When is the lowest UV index in Monterrey?

The months with the lowest UV index in Monterrey, Mexico, are January and December, with an average maximum UV index of 4.

How high is the UV index in December in Monterrey?

In Monterrey, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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

21.5°C 70.7°F

19.5°C 67.1°F

18.5°C 65.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9km/h 5.6mph

8.4km/h 5.2mph

9km/h 5.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

21.5

21.4

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Monterrey, Mexico

Average high temperature in December: 19.5°C

The warmest month (with the highest average high temperature) is August (31.7°C).
The month with the lowest average high temperature is January (18.5°C).

Average low temperature in December: 9.5°C

The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is January (8.3°C).

[Resources]

Average pressure in December
Monterrey, Mexico

Average pressure in December: 1018.1mbar

The month with the highest atmospheric pressure is January (1019.5mbar).
The month with the lowest atmospheric pressure is May (1011.6mbar).

[Resources]

Average wind speed in December
Monterrey, Mexico

Average wind speed in December: 7.4km/h

The windiest months (with the highest average wind speed) are June and July (11.9km/h).
The calmest month (with the lowest average wind speed) is December (7.4km/h).

[Resources]

Average humidity in December
Monterrey, Mexico

Average humidity in December: 59%

The month with the highest relative humidity is September (69%).
The month with the lowest relative humidity is April (50%).

[Resources]

Average rainfall in December
Monterrey, Mexico

Average rainfall in December: 14mm

The wettest month (with the highest rainfall) is May (105mm).
The driest month (with the least rainfall) is February (12mm).

[Resources]

Average rainfall days in December
Monterrey, Mexico

Average rainfall days in December: 6 days

The month with the highest number of rainy days is September (22.8 days).
The month with the least rainy days is December (6 days).

[Resources]

Average snowfall in December
Monterrey, Mexico

Average snowfall in December: 6mm

The month with the highest snowfall is December (6mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0mm).

[Resources]

Average snowfall days in December
Monterrey, Mexico

Average snowfall days in December: 0.1 days

The months with the highest number of snowfall days are January and February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Monterrey, Mexico

Average daylight in December: 10h and 4min

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).

Average sunshine in December: 7h and 1min

The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is November (Average sunshine: 7h and 0min).

[Resources]

Average sunshine days in December
Monterrey, Mexico

Average sunshine days in December: 21.5 days

The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is September (5.5 days).

[Resources]

Average UV index in December
Monterrey, Mexico

Average UV index in December: 4

The months with the highest UV index are May and July (UV index 7).
The months with the lowest UV index are January and December (UV index 4).

[Resources]

Average cloud cover in December
Monterrey, Mexico

Average cloud cover in December: 18

The month with the most cloud cover is September (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 15).

[Resources]

Average visibility in December
Monterrey, Mexico

Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (10km).
The month with the lowest visibility is September (9km).

[Resources]

December weather forecast
Monterrey, Mexico

Contents