Mendoza weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: March – November
What is the weather like in Mendoza in September?
In September, Mendoza is mild: daytime highs average 19 °C, and nights cool down to about 6 °C. The sun shines for around 8 hours a day. Rain falls on about 6 days, adding up to 34 mm. All in all, September is an excellent month for a holiday in Mendoza.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 91 | 92 | 89 |
| Day | 16° | 19° | 23° |
| Night | 4° | 6° | 10° |
| Sun | 8 h | 8 h | 9 h |
| Rain days | 5 | 6 | 9 |
More details for September
- Daylight
- 11 h 51 min07:35 – 19:26
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 30 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC−3America/Argentina/Mendoza
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %77 %
- Few rainy daysweight 30 %88 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Mountain air”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Mendoza in September: quick answers
Is Mendoza hot in September?
No. In September, Mendoza is mild: daytime highs average 19 °C and nights drop to about 6 °C.
Does it rain much in Mendoza in September?
Rain falls on about 6 days, adding up to 34 mm.
Mendoza month by month
The whole year in MendozaAll destinations: ArgentinaWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences