Mexico City Weather in December
Mexico · Subtropical Highlands climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Mexico City sees average temperatures ranging from a low of 7.8°C (46.0°F) to a high of 22.3°C (72.1°F), with a mean of 14.5°C (58.1°F). Compared to the annual average of 17.2°C (63.0°F), this month is 2.7°C cooler than the yearly norm. Precipitation averages 9.1mm, making it approximately 79.0mm drier than the monthly average of 88.0mm. The city receives an average of 10.3 hours of sunshine per day during December, with relative humidity averaging 57.7%. Wind speeds reach an average maximum of 16.0 km/h. For travelers, this month offers a temperature experience in Mexico City, with drier-than-average conditions compared to the rest of the year.
Mexico City's altitude (2,240m) is the packing variable everyone forgets. I packed for 25°C days and shivered through 12°C nights — the swing is real. Layering is non-negotiable; bring a fleece even in May. The dry season (November-April) is the sweet window: 22°C, low rain, low humidity. Skip May-June when heat plus dust plus ozone make breathing uncomfortable. July-September is rainy season — spectacular afternoon thunderstorms but plan indoor mornings. Sunscreen is essential at altitude even on cloudy days. And drink water constantly; the thin air dehydrates you faster than you'd expect.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 16.1°C (61.0°F) | 14.5°C (58.1°F) | 14.5°C (58.1°F) |
| Rainfall | 9.4mm | 9.1mm | 5.8mm |
| Sunshine | 10.5 hrs | 10.3 hrs | 10.2 hrs |
| Humidity | 58.6% | 57.7% | 53.6% |
| Wind | 18.1 km/h | 16.0 km/h | 18.7 km/h |
| Rainy Days | 7.8 | 5.6 | 4.2 |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Mexico City in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Mexico City in December?
The average temperature in Mexico City during December ranges from 7.8°C (46.0°F) to 22.3°C (72.1°F), with a mean of 14.5°C (58.1°F).
How much does it rain in Mexico City in December?
Mexico City receives an average of 9.1mm of precipitation in December, spread across approximately 5.6 rainy days.
What should I pack for Mexico City in December?
Based on December weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is December a good time to visit Mexico City?
December is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Mexico City
Cities with Similar December Climate (Subtropical Highlands)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 19.43°, -99.13°. Timezone: America/Mexico_City. Last updated: 2026-07-30.