Mexico City Weather in August

🇲🇽 Mexico

21°C

High

12°C

Low

Rain Days

10h

Sunshine

78%

Humidity

North America › 🇲🇽 Mexico › Mexico City

Updated: March 2026

Is August a Good Time to Visit Mexico City?

5/10

Fair

August is a fair time to visit Mexico City (5/10). With 10 daily sunshine hours and only 23 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 8th sunniest of the year in Mexico City. Culture-focused travellers and those who prefer lighter crowds will find August a practical choice, with prices running lower than peak April without sacrificing all the good weather. September offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 23 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.

vs July:21°C avg high

The single most important thing to know about visiting Mexico City in August: rain is a genuine factor across 23 days of the month, meaning your plans need built-in indoor alternatives. Precipitation totals 168mm for the month, spread across roughly 23 days, and 10 sunshine hours per day give you a reliable window for outdoor plans.

21°C

Avg High

12°C

Avg Low

23 days

Rain Days

10h

Sunshine

78%

Humidity

Temperature in Mexico City in August

The 9°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 21°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. UV index averages 9 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Winds are calm at an average 13 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 70°F average high, 54°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in August

Monthly Precipitation (mm)

What to Wear in Mexico City in August

Morning12°CBefore the day warms up

Afternoon21°CPeak daytime temperature

Evening15°CAfter sunset cools down

Packing for Mexico City in August means dressing for 21°C days and 12°C evenings. A light cotton tee with a casual overshirt works well at 21°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 12°C, a modest 9°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. With 23 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. At 78% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.

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Local tip: Mexico City sees heavy rain periods where a compact travel umbrella can feel inadequate. A packable waterproof jacket offers better coverage for prolonged downpours and leaves both hands free for maps and cameras.

Events in Mexico City in August

August 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 August

Based on 21°C average highs and 23 rainy days

Light jacket or cardigan for cooler evenings
Mix of short and long-sleeve layers
Comfortable walking shoes with good arch support
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Mexico City in August

Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 21°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)August is reliably dry enough for rural day trips without weather risk
Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 23 rain days expected, having a full-day indoor plan is practical insurance
Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningAugust 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-1pmAugust seasonal produce is at peak availability, offering dishes not found at other times of year

Why is Mexico City mild in August?

Mexico City's August climate is governed by the Inter-Tropical Convergence Zone (ITCZ), which draws moisture-laden trade winds across the region, producing the characteristic wet season rainfall of warm tropical cities. Daytime heat peaks around 21°C, moderated slightly by afternoon convective showers. Overnight temperatures remain warm at 12°C because the humid air retains heat effectively. 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 August

In August, Mexico City experiences average highs of 21°C (70°F) and lows of 12°C (54°F). Expect around 23 rainy days and 10 hours of sunshine per day, with humidity averaging 78%. The 9°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 9, so sun protection is advisable on clear days.

Mexico City typically sees 23 rainy days in August, with total precipitation of around 168mm. This is a notably wet period. A waterproof jacket or compact umbrella is essential, and it is worth building indoor alternatives into your daily itinerary for the inevitable rainy stretches. For context, the driest month in Mexico City typically sees 4-6 fewer rain days than August.

Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Mexico City in August. Daytime temperatures of 21°C are pleasant, but the evening drop to 12°C means a jacket is essential if you plan to be out after dark. With 23 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.

August is a reasonable time to visit Mexico City. Expect 23 rainy days, so pack a light rain layer for flexibility. Average temperatures of 21°C make outdoor exploration comfortable during the dry periods. With 10 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.

The average high temperature in Mexico City in August is 21°C (70°F), and the average low is 12°C (54°F). The mean daily temperature is approximately 17°C (62°F). The day-to-night range of 9°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.

August is shoulder or low season in Mexico City, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 23 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 August, Mexico City suits a range of activities thanks to mild temperatures around 21°C. With frequent rain, indoor activities and covered attractions are a smart choice. 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.

August ranks 8th 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 September. Compared to last month (July: 21°C high, 24 rain days), August is similarly warm and drier. August sits in the middle of the annual sunshine ranking for Mexico City, offering a reasonable balance of good weather and manageable crowds.

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

Other Months in Mexico City

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Mexico City

Best Time to Visit Mexico City Mexico City vs Guadalajara in August

Data Sources for Mexico City

Mexico City on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.