Weather in Mexico City 🇲🇽
Monthly weather averages & travel planning
December
Avg Temp
20°C
Rain Days
3 days
Sun Hours
10 hrs
Humidity
78%
North America › 🇲🇽 Mexico › Mexico City
Updated: March 2026
Is December a Good Time to Visit Mexico City?
8/10
Excellent
December is a excellent time to visit Mexico City (8/10). With 10 daily sunshine hours and only 3 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 11th sunniest of the year in Mexico City. Beach and outdoor-focused visitors will find December ideal, though hotel prices reflect demand and popular sites get crowded by mid-morning. January offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Mexico City's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: book accommodation at least 6-8 weeks ahead, as popular hotels fill quickly during December. Purchasing skip-the-line tickets for major attractions in advance saves meaningful time. If you have flexibility, arriving a few days before or after peak weekends reduces both crowds and prices noticeably.
vs November:20°C avg high
The single most important thing to know about visiting Mexico City in December: conditions are genuinely cooperative, with 20°C highs and only 3 wet days making this one of the more straightforward months to plan around. Precipitation totals 15mm for the month, spread across roughly 3 days, and 10 sunshine hours per day give you a reliable window for outdoor plans.
20°C
68°F
Avg High
8°C
46°F
Avg Low
3 days
15 mm total
Rain Days
10h
per day avg
Sunshine
78%
Humid
Humidity
Temperature in Mexico City in December
The 12°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. At 78% humidity, the 20°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. The UV index of 3 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Winds are calm at an average 12 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 68°F average high, 46°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Mexico City in December
Morning8°CBefore the day warms up
Afternoon20°CPeak daytime temperature
Evening11°CAfter sunset cools down
Packing for Mexico City in December means dressing for 20°C days and 8°C evenings. A light cotton tee with a casual overshirt works well at 20°C, the overshirt doubles as a layer for air-conditioned venues. Evenings drop 12°C to around 8°C, a notable shift that catches underprepared visitors off guard. Pack a dedicated evening layer. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. At 78% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Layers are more practical than a single heavy garment in Mexico City. The day-to-evening temperature shift rewards packing a versatile mid-layer you can add or remove as conditions change.
Events in Mexico City in December
December has no major festivals or public holidays in Mexico City, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Mexico City in December
Based on 20°C average highs and 3 rainy days
- Light jacket or cardigan for cooler evenings
- Mix of short and long-sleeve layers
- Comfortable walking shoes with good arch support
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Mexico City in December
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 20°C, the temperature is ideal for extended walking without overheating
- Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
- Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
- Day trip to the surrounding countryside or coastFull day (depart by 8am)December is reliably dry enough for rural day trips without weather risk
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningDecember brings distinct seasonal changes to public green spaces worth exploring
- Try the seasonal farmer's market for local produce and street foodSaturday morning markets typically 8am-1pmDecember seasonal produce is at peak availability, offering dishes not found at other times of year
Why is Mexico City mild in December?
In December, Mexico City sits in the dry season corridor, as the ITCZ shifts away from the region and trade winds bring drier, more stable air. This produces reliably sunny days reaching 20°C, with lower humidity than the wet months. Overnight lows of 8°C offer a pleasant reprieve from the midday heat. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Mexico City in December
In December, Mexico City experiences average highs of 20°C (68°F) and lows of 8°C (46°F). Expect around 3 rainy days and 10 hours of sunshine per day, with humidity averaging 78%. The 12°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an extra jacket is essential for evenings. UV exposure is moderate at index 3.
Mexico City typically sees 3 rainy days in December, with total precipitation of around 15mm. This makes December one of the drier months of the year, and a reliable window for outdoor sightseeing and day trips. Rain showers tend to be brief when they do occur. For context, the driest month in Mexico City typically sees 4-6 fewer rain days than December.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Mexico City in December. Daytime temperatures of 20°C are pleasant, but the evening drop to 8°C means a jacket is essential if you plan to be out after dark. Rain is infrequent with only 3 wet days, so a light rain layer is optional. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
Yes, December is an excellent time to visit Mexico City. With 10 daily sunshine hours and only 3 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 20°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Mexico City in December is 20°C (68°F), and the average low is 8°C (46°F). The mean daily temperature is approximately 14°C (57°F). The day-to-night range of 12°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Mexico City is generally April. April offers the most sunshine at 12 hours per day and only 10 rainy days. Average temperatures reach 25°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around April gives you the best chance of dry, bright weather.
December is shoulder or low season in Mexico City, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 3 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In December, Mexico City suits a range of activities thanks to mild temperatures around 20°C. With few rainy days, outdoor activities are highly recommended. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 10 hours of sunshine, parks and waterfront walks are particularly enjoyable.
December ranks 11th sunniest of the year in Mexico City, with an average 10 daily sunshine hours. The driest months are December, January, and February. April is the hottest month (25°C avg high); January is the coolest (20°C). From here, temperatures fall 0°C into January. Compared to last month (November: 20°C high, 7 rain days), December is similarly warm and drier. December is one of the least sunny months, but that often means lower prices and fewer fellow tourists.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 20°C | 7°C | 4 | 10h | View |
| February | 22°C | 8°C | 4 | 11h | View |
| March | 24°C | 9°C | 6 | 11h | View |
| April | 25°C | 11°C | 10 | 12h | View |
| May | 25°C | 12°C | 13 | 12h | View |
| June | 23°C | 13°C | 19 | 10h | View |
| July | 21°C | 12°C | 24 | 10h | View |
| August | 21°C | 12°C | 23 | 10h | View |
| September | 21°C | 12°C | 22 | 9h | View |
| October | 20°C | 10°C | 14 | 10h | View |
| November | 20°C | 9°C | 7 | 10h | View |
| December | 20°C | 8°C | 3 | 10h | View |
January
4 rain days, 10h sun
20°7°
February
4 rain days, 11h sun
22°8°
March
6 rain days, 11h sun
24°9°
April
10 rain days, 12h sun
25°11°
May
13 rain days, 12h sun
25°12°
June
19 rain days, 10h sun
23°13°
July
24 rain days, 10h sun
21°12°
August
23 rain days, 10h sun
21°12°
September
22 rain days, 9h sun
21°12°
October
14 rain days, 10h sun
20°10°
November
7 rain days, 10h sun
20°9°
December
3 rain days, 10h sun
20°8°
Other Months in Mexico City
Plan Your Trip to Mexico City
Data Sources for Mexico City
Climate normals represent 30-year averages (1991-2020). Individual years may vary.