Mendoza Weather in September
September in Mendoza averages 31°C (88°F) during the day and 25°C (77°F) at night. It is the wettest month of the year, with 157 mm (6.2 in) of rainfall on average, so waterproof gear is a must.
Rainfall in Mendoza in September
This month marks the year's heaviest rainfall, with frequent intense showers. It's advisable to be prepared with appropriate rain gear to stay dry. You can expect rain on roughly 14 days based on historical data, averaging 157 mm (6.2 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Mendoza in September
September in Mendoza sees highs of 31°C (88°F) and lows of 25°C (77°F) overnight. Sunshine and humidity can make it feel even warmer than the raw temperature suggests. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference. Keep in mind, these temperatures are averages, and some days might be even warmer. Dress suitably to manage the heat.
Sunshine in Mendoza in September
There are approximately 218 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Mendoza in September
September sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.
Average water temperature in September
The water reaches 29°C (84°F) this month. It's on the warm side, which suits people who prefer that, but don't expect a cooling dip if the air temperature is also high.September in Mendoza has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, 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 the Dominican Republic, check out our Mendoza's climate page.
Mendoza Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Water Temperature
29°C (84°F) *
Chance of Rain
48%
Precipitation
157 mm (6.2 in)
Rainy days
14 days
Humidity
85% *
Windspeed
2 m/s (4 knots) *
Sunshine
218 hours *
Percentage Sunshine
*
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Mendoza typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
47-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 Mendoza in September
Browse day-by-day weather records for Mendoza spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mendoza historical weather extremes in September
Based on weather observations in Mendoza between 1999 and 2025, these are the recorded extremes during September.
- The hottest September day on record in Mendoza reached 36°C (97°F) (September 3, 2012).
- The lowest daytime temperature in September was 25°C (77°F), recorded on September 16, 2004.
- Nighttime temperatures dropped to 21°C (70°F) on September 28, 2024, marking the coldest September night on record.
- The wettest September day on record brought 93 mm (3.7 in) of precipitation to Mendoza (September 24, 2008).
Best Places in the Dominican Republic in September
Find out more about the weather in the Dominican Republic and which places have the best travel conditions in this month. See all of the Dominican Republic in September →
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What to Wear in Mendoza 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. The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Mendoza 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 the Dominican Republic, check out our Mendoza's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Mendoza climate overview or explore weather in the Dominican Republic.
