Monthly climate guide
Monterrey weather in December
December in Monterrey is typically mild, with average daytime highs around 21°C (69°F) and night-time lows near 6°C (42°F). The month usually brings about 19 mm of rain (very dry) and is a mix of sun and cloud. Daytime highs are 2°C cooler than November and about the same as January.
What stands out in December
- December brings early winter to Monterrey.
- Afternoons and nights feel like different seasons, roughly 15°C apart.
- Just 210 km apart, but Monterrey runs about 3°C cooler than Reynosa this month.
- Only one month is cooler in Monterrey than December.
Avg high
21°C
69°F
Avg low
6°C
42°F
Rainfall
19 mm
very dry
Humidity
58%
relative
Sky
46%
cloud · a mix of sun and cloud
Monterrey weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 19°C / 67°F | 4°C / 40°F | 18 mm | 57% | 47% |
| February | 23°C / 73°F | 7°C / 44°F | 13 mm | 51% | 44% |
| March | 25°C / 77°F | 9°C / 49°F | 32 mm | 50% | 45% |
| April | 29°C / 84°F | 12°C / 54°F | 22 mm | 45% | 45% |
| May | 30°C / 86°F | 15°C / 59°F | 45 mm | 55% | 46% |
| June | 30°C / 86°F | 16°C / 60°F | 58 mm | 61% | 42% |
| July | 29°C / 85°F | 16°C / 60°F | 63 mm | 62% | 45% |
| August | 30°C / 85°F | 16°C / 60°F | 47 mm | 63% | 37% |
| September | 27°C / 80°F | 15°C / 59°F | 126 mm | 71% | 50% |
| October | 26°C / 78°F | 12°C / 53°F | 33 mm | 67% | 34% |
| November | 22°C / 72°F | 8°C / 47°F | 26 mm | 65% | 42% |
| December | 21°C / 69°F | 6°C / 42°F | 19 mm | 58% | 46% |
What to pack for December
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
Is December a good time to visit Monterrey?
Compare the months in the chart above to find your ideal window.
Best time to visit Monterrey →Other Mexico cities in December
Cite or embed this data
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Monterrey weather in December. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/mexico/monterrey/december
<a href="https://weathercompare.eu/weather/mexico/monterrey/december">Monterrey weather in December</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/mexico/monterrey" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Monterrey weather in December"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/mexico/monterrey/december">Monterrey weather in December</a> – WeatherCompare</p>
Monterrey in December: quick answers
Is December a good time to visit Monterrey?
December is a reasonable time for Monterrey: highs around 21°C and about 19 mm of rain, though not one of the three best months.
How warm is Monterrey in December?
Average highs are about 21°C (69°F) and average lows about 6°C (42°F), based on 10 years of daily data.
Does it rain a lot in Monterrey in December?
Monterrey typically gets around 19 mm of rain in December — very dry.
Figures are long-term averages for the area around Monterrey (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.