Monterrey Weather in December
In December, Monterrey averages a high of 22°C (71°F) and a low of 9°C (49°F), from 38 years of daily records (1971–2025).
22°C
Average high
71°F
9°C
Average low
49°F
37°C
Record high
98°F · December 8, 2004
-6°C
Record low
21°F · December 23, 1989
What December Is Like in Monterrey
- The coldest December reading, -6°C (21°F) on December 23, 1989, has not been matched in 36 years.
- December is Monterrey's driest month, averaging 15 mm of rain against 142 mm in the wettest.
- A typical December brings 4 days above 30°C (86°F).
- The warmest December in the record was 2007; the coldest was 1975.
At least 1 mm of rain falls on 8% of December days, and the month averages 15 mm in total.
Warmest: 2007 (27.7°C)Latest: 2023 (22.9°C)10-year averageLong-run average (21.7°C)
Look Up a Day in December
See the weather in Monterrey on any December date, year by year.
Source: NOAA GHCN-Daily, Topo Chico (1971–2005); Monterrey (City) (1982–2025). Averages cover 1971–2025. How we compute this