Acapulco
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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.

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

Acapulco Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Acapulco - and find the best time to visit.

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 records 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 2026.

  • 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
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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.

  • Swimming
    7/10
  • Cycling
    7/10
  • Walking
    7/10
  • Camping
    6/10
  • Outdoor sports
    7/10

Acapulco 3-Day Forecast

More climate data for Acapulco

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.