Santa Cruz Huatulco Weather in September
September in Santa Cruz Huatulco brings high temperatures, with daytime highs of 29°C (84°F) and nights around 25°C (77°F). It's also the wettest month of the year, so an umbrella is a must.
Rainfall in Santa Cruz Huatulco in September
Santa Cruz Huatulco is in the rainy season in September, with rain on around 7 days and an average of 521 mm (21 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 Santa Cruz Huatulco in September
Daytime highs in Santa Cruz Huatulco in September reach 29°C (84°F), with nights around 25°C (77°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 25°C (77°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in Santa Cruz Huatulco in September
You can expect a moderate amount of sunlight, with approximately 153 hours. Even though this month is part of the wet season, you can still see the sun occasionally.
Average water temperature in September
The water is 29°C (84°F) — very warm by most standards. Comfortable to swim in, but not particularly refreshing if you're looking to cool off.September in Santa Cruz Huatulco 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 Santa Cruz Huatulco's climate page.
Santa Cruz Huatulco Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Water Temperature
29°C (84°F) *
Chance of Rain
24%
Precipitation
521 mm (21 in)
Rainy days
7 days
Humidity
66% *
Sunshine
153 hours *
Percentage Sunshine
*
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Santa Cruz Huatulco typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows typically ranging from 22°C (72°F) to 25°C (77°F).
Average temperatures in September
Historical weather for Santa Cruz Huatulco in September
Browse day-by-day weather records for Santa Cruz Huatulco spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Santa Cruz Huatulco historical weather extremes in September
Based on 10 years of weather observations in Santa Cruz Huatulco between 2015 and 2025, these are the recorded extremes.
- Santa Cruz Huatulco recorded its highest September temperature of 37°C (99°F) on September 4, 2024.
- The coldest September day was on September 12, 2021, with a maximum of 26°C (79°F).
- Nighttime temperatures dropped to 21°C (70°F) on September 26, 2015, marking the coldest September night on record.
- The wettest September day on record brought 230 mm (9.1 in) of precipitation to Santa Cruz Huatulco (September 12, 2022).
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 →
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What to Wear in Santa Cruz Huatulco 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. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Santa Cruz Huatulco 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 Santa Cruz Huatulco's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Santa Cruz Huatulco climate overview or explore weather in Mexico.
