Mendoza in September
In September, Mendoza averages 20°C (68°F) during the day and 9°C (47°F) at night, with only about 4 rainy days.
High seasonConditions are comfortable for sightseeing without being sweltering. Occasional showers are likely but won't dominate.
September is a great month to visit Mendoza: pleasant temperatures and relatively few wet days.
How September compares to the rest of the year in Mendoza
September is in the middle of the year for warmth in Mendoza (8th of 12) and one of the driest months (10th of 12). Daytime temperature runs 2°C below the annual average (22°C). September runs 3°C warmer than August (17°C) and warms a further 3°C into October (23°C).
September sunrise & sunset in Mendoza
Times shown for Mendoza local time (America/Argentina/Mendoza), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Mendoza — September
Golden-hour and blue-hour windows for the 15th of September, in Mendoza's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Mendoza in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Mendoza's popularity.
Crowds & pricing — September in Mendoza
This is a busy month in Mendoza — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Mendoza
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Mendoza in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 31°C / 87°F | 20°C / 68°F | 52 mm | 6 | — |
| February | 28°C / 82°F | 18°C / 65°F | 50 mm | 7 | — |
| March | 26°C / 78°F | 16°C / 61°F | 42 mm | 7 | — |
| April | 21°C / 69°F | 12°C / 54°F | 38 mm | 6 | — |
| May | 16°C / 61°F | 8°C / 47°F | 31 mm | 6 | — |
| June | 13°C / 55°F | 4°C / 39°F | 13 mm | 4 | — |
| July | 13°C / 55°F | 4°C / 39°F | 11 mm | 3 | — |
| August | 17°C / 62°F | 6°C / 43°F | 19 mm | 3 | — |
| September | 20°C / 68°F | 9°C / 47°F | 15 mm | 4 | — |
| October | 23°C / 74°F | 12°C / 53°F | 37 mm | 6 | — |
| November | 27°C / 81°F | 15°C / 60°F | 32 mm | 5 | — |
| December | 30°C / 86°F | 18°C / 65°F | 33 mm | 5 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Mendoza in September →
Frequently asked questions
How hot is Mendoza in September?
In September, Mendoza averages a high of 20°C (68°F) and a low of 9°C (47°F) — generally mild and pleasant.
Does it rain a lot in Mendoza in September?
September is generally dry in Mendoza, with about 4 rainy days on average.
Is September a good time to visit Mendoza?
September is mild and pleasant and mostly dry. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Mendoza in September?
Pack light layers for warm days and cooler evenings. See the full September packing list for Mendoza for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.