December weather forecastMonterrey, Mexico
December
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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).
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).
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).
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).
Average daylight in December /
Average sunshine in December
Monterrey, Mexico
- Average daylight in December: 10h and 36min
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 12min
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).
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).
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).
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).
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).
