Guadalajara Weather in September

🇲🇽 Mexico

26°C

High

16°C

Low

Rain Days

10h

Sunshine

78%

Humidity

North America › 🇲🇽 Mexico › Guadalajara

Updated: March 2026

Is September a Good Time to Visit Guadalajara?

5/10

Fair

September is a fair time to visit Guadalajara (5/10). With 10 daily sunshine hours and only 20 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 9th sunniest of the year in Guadalajara. Culture-focused travellers and those who prefer lighter crowds will find September a practical choice, with prices running lower than peak March without sacrificing all the good weather. October offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 20 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 August:26°C avg high

Planning a trip to Guadalajara in September? Days warm to 26°C on average while evenings hold at 16°C, giving you a clear sense of what to pack. The month delivers roughly 10 hours of sunshine per day and 148mm of rainfall spread across 20 wet days, so there is plenty of fair weather to work with.

26°C

Avg High

16°C

Avg Low

20 days

Rain Days

10h

Sunshine

78%

Humidity

Temperature in Guadalajara in September

The 10°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 26°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 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Winds are calm at an average 11 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 79°F average high, 61°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in September

Monthly Precipitation (mm)

What to Wear in Guadalajara in September

Morning16°CBefore the day warms up

Afternoon26°CPeak daytime temperature

Evening19°CAfter sunset cools down

Packing for Guadalajara in September means dressing for 26°C days and 16°C evenings. A light cotton tee with a casual overshirt works well at 26°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 16°C, a modest 10°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 20 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: Guadalajara 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 Guadalajara in September

September has no major festivals or public holidays in Guadalajara, 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 Guadalajara in September

Based on 26°C average highs and 20 rainy days

Light layers for morning and evening
Breathable T-shirts and comfortable trousers
UV-protective sunglasses
Quick-dry travel towel
Anti-chafe balm for long walking days
Moisture-wicking synthetic fabrics for active days
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
SPF 30+ sunscreen
Comfortable walking shoes (a second pair lets the first air out overnight)
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Guadalajara in September

Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 26°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)September 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 20 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 morningSeptember brings distinct seasonal changes to public green spaces worth exploring
Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in September, with vendors setting up specifically for warm evenings

Why is Guadalajara warm in September?

Guadalajara's September 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 26°C, moderated slightly by afternoon convective showers. Overnight temperatures remain warm at 16°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: Guadalajara in September

In September, Guadalajara experiences average highs of 26°C (79°F) and lows of 16°C (61°F). Expect around 20 rainy days and 10 hours of sunshine per day, with humidity averaging 78%. The 10°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 6, so sun protection is advisable on clear days.

Guadalajara typically sees 20 rainy days in September, with total precipitation of around 148mm. 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 Guadalajara typically sees 4-6 fewer rain days than September.

Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Guadalajara in September. Daytime temperatures of 26°C are pleasant, but the evening drop to 16°C means a jacket is essential if you plan to be out after dark. With 20 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.

September is a reasonable time to visit Guadalajara. Expect 20 rainy days, so pack a light rain layer for flexibility. Average temperatures of 26°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 Guadalajara in September is 26°C (79°F), and the average low is 16°C (61°F). The mean daily temperature is approximately 21°C (70°F). The day-to-night range of 10°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 Guadalajara is generally March. March offers the most sunshine at 12 hours per day and only 1 rainy days. Average temperatures reach 29°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around March gives you the best chance of dry, bright weather.

September is shoulder or low season in Guadalajara, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 20 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 September, Guadalajara suits a range of activities thanks to mild temperatures around 26°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.

September ranks 9th sunniest of the year in Guadalajara, with an average 10 daily sunshine hours. The driest months are March, April, and December. May is the hottest month (32°C avg high); January is the coolest (24°C). From here, temperatures fall 0°C into October. Compared to last month (August: 26°C high, 23 rain days), September is similarly warm and drier. September sits in the middle of the annual sunshine ranking for Guadalajara, offering a reasonable balance of good weather and manageable crowds.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	24°C	10°C	2	10h	View
February	26°C	12°C	2	11h	View
March	29°C	14°C	1	12h	View
April	31°C	16°C	1	12h	View
May	32°C	17°C	4	12h	View
June	29°C	18°C	17	11h	View
July	26°C	17°C	24	10h	View
August	26°C	17°C	23	10h	View
September	26°C	16°C	20	10h	View
October	26°C	15°C	9	10h	View
November	25°C	13°C	3	10h	View
December	24°C	11°C	1	10h	View

Other Months in Guadalajara

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

Plan Your Trip to Guadalajara

Best Time to Visit Guadalajara Guadalajara vs Mexico City in September

Data Sources for Guadalajara

Guadalajara 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.