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Nuevo Vallarta Weather in September
Nuevo Vallarta in September sees high temperatures, with highs around 30°C (86°F) and overnight lows of 24°C (75°F). Rainfall is at its peak this month, around 340 mm (13 in) on average, so waterproofs are essential.
Rainfall in Nuevo Vallarta in September
As part of the rainy season, Nuevo Vallarta sees around 17 days of rain in September, with an average of 340 mm (13 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Nuevo Vallarta in September
September in Nuevo Vallarta brings high temperatures, with highs of 30°C (86°F) and nights around 24°C (75°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are warm at 24°C (75°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Average water temperature in September
At 30°C (86°F), the water feels bath-warm. Fine for swimming, but those looking for a cooling swim may be a bit disappointed.September in Nuevo Vallarta 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.
Nuevo Vallarta Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
30°C (86°F)
Water Temperature
30°C (86°F) *
Chance of Rain
58%
Precipitation
340 mm (13 in)
Rainy days
17 days
Humidity
70% *
* Data from: Puerto Vallarta, Mexico (9 KM, 5 Miles).
Nuevo Vallarta Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Nuevo Vallarta - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Nuevo Vallarta 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
Historical weather records for Nuevo Vallarta in September
Browse day-by-day weather records for Nuevo Vallarta spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Nuevo Vallarta historical weather extremes in September
The extremes listed below come from historical weather data collected in Nuevo Vallarta from 1986 through 2026.
- The hottest September day on record in Nuevo Vallarta reached 36°C (97°F) (September 15, 2005).
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 8, 2013.
- The coldest night in September in Nuevo Vallarta was on September 3, 2019, with a minimum of 17°C (63°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 Nuevo Vallarta 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! Expect water temperatures of around 30°C (86°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off.
What To Do in Nuevo Vallarta in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Nuevo Vallarta 3-Day Forecast
More climate data for Nuevo Vallarta
Temperature Rainfall Humidity Water Temp
See the full Nuevo Vallarta climate overview or explore weather in Mexico.
Popular in September
Where to go in September - average daytime high across popular destinations.
Puerto Peñasco
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27°C (81°F) Mexico City23°C (73°F) Bucket list
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