Acapulco Weather in September
During September, Acapulco experiences very high daytime temperatures of 30°C (86°F) and cooler nights around 25°C (77°F). As the wettest month of the year, expect frequent rainfall.
Rainfall in Acapulco in September
Acapulco is in the rainy season in September, with rain on around 16 days and an average of 347 mm (14 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.
Temperature in Acapulco in September
In September, expect very high temperatures in Acapulco, with highs of 30°C (86°F) and lows of 25°C (77°F) at night. It's usually most comfortable outside during the morning and later in the day. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Acapulco in September
With approximately 195 hours of sunshine, the days are filled with clear skies during the day. Rain typically falls in the afternoon or evening, keeping mornings and early parts of the day sunny.
Average water temperature in September
The water is 30°C (86°F) — very warm by most standards. Comfortable to swim in, but not particularly refreshing if you're looking to cool off.September in Acapulco can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options 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 Acapulco's climate page.
Acapulco Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Water Temperature
30°C (86°F)
Chance of Rain
53%
Precipitation
347 mm (14 in)
Rainy days
16 days
Humidity
76%
Sunshine
195 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Acapulco typically stay consistent throughout September, with daily highs averaging around 30°C (86°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 Acapulco in September
Browse day-by-day weather records for Acapulco spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Acapulco historical weather extremes in September
The extremes listed below come from historical weather data collected in Acapulco from 1986 through 2025.
- On September 16, 2023, temperatures climbed to 37°C (99°F), marking the warmest September day on record.
- The coldest September day was on September 19, 2000, with a maximum of 24°C (75°F).
- Acapulco registered its coldest September night on September 12, 2001, with temperatures dropping to 20°C (68°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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What to Wear in Acapulco in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! With water temperatures around 30°C (86°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Acapulco 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 Acapulco's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Acapulco climate overview or explore weather in Mexico.
