Mazatlán Weather in September
Thinking of visiting Mazatlán in September? Expect very high temperatures reaching 32°C (90°F) during the day, dropping to 26°C (79°F) at night, and be prepared for the wettest month of the year.
Rainfall in Mazatlán in September
This month brings the peak rainfall of the year, with heavy showers. Be sure to have a poncho ready to manage the downpours. Past climate data indicates that roughly 12 days will see rain, totalling around 225 mm (8.9 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Mazatlán in September
Daytime temperatures in Mazatlán reach 32°C (90°F) in September, dropping to 26°C (79°F) at night. It's usually most comfortable outside during the morning and later in the day. Nights are warm at 26°C (79°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.
Sunshine in Mazatlán in September
The city usually sees around 220 hours of sunlight, indicating many sunny days — a great month for sightseeing.September in Mazatlán has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Mazatlán's climate page.
Mazatlán Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
32°C (90°F)
Chance of Rain
41%
Precipitation
225 mm (8.9 in)
Rainy days
12 days
Humidity
82%
Sunshine
220 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Mazatlán typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Mazatlán in September
Browse day-by-day weather records for Mazatlán spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mazatlán historical weather extremes in September
Based on 39 years of weather observations in Mazatlán between 1986 and 2025, these are the recorded extremes.
- The warmest day in September was on September 28, 2000, with a maximum of 38°C (100°F).
- The coldest September day was on September 21, 2003, with a maximum of 26°C (79°F).
- The coldest night in September in Mazatlán was on September 28, 1989, with a minimum of 19°C (66°F).
Best Places in Mexico in September
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in September →
perfect weather
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tolerable
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What to Wear in Mazatlán in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Mazatlán in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Mazatlán's climate page.
Temperature Rainfall Sunshine Humidity
See the full Mazatlán climate overview or explore weather in Mexico.
