Mendoza Weather in September

Mendoza in September sees pleasant temperatures, with highs around 20°C (68°F) and overnight lows of 7°C (45°F). Overall perfect conditions make it one of the better months to visit.

Rainfall in Mendoza in September

Rain is expected on roughly 3 days, totalling around 38 mm (1.5 in) for the month. The rain this month typically falls in concentrated bursts rather than all-day showers. Expect a few heavier spells rather than constant grey skies.

Temperature in Mendoza in September

September in Mendoza is generally perfect, with days reaching 20°C (68°F) and nights settling around 7°C (45°F). The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 7°C (45°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Mendoza in September

The city usually sees around 221 hours of sunlight, indicating many sunny days — a great month for sightseeing.

Wind Speed in Mendoza in September

Average wind conditions reach 1 m/s (2 knots) in September. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.

If your ideal day consists of dry skies and pleasant temperatures, February, March, April, September, October and November typically offer the best circumstances for Mendoza.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
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• May
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• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our Mendoza's climate page.

Mendoza Temperature in September

Min Temperature 7°C (45°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 11%  

Precipitation 38 mm (1.5 in)  

Rainy days 3 days  

Humidity 50%  

Windspeed 1 m/s (2 knots)  

Sunshine 221 hours  

Percentage Sunshine 63%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Mendoza typically rise from around 19°C (66°F) at the start of September to approximately 22°C (72°F) by the end. Nights are cool, with lows typically ranging from 6°C (43°F) to 11°C (52°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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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.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Mendoza historical weather extremes in September

Based on 12 years of weather observations in Mendoza between 2013 and 2025, these are the recorded extremes.

• The hottest September day on record in Mendoza reached 35°C (95°F) (September 22, 2018).
• The coldest September day was on September 16, 2013, with a maximum of 7°C (45°F).
• Mendoza registered its coldest September night on September 3, 2019, with temperatures dropping to -1°C (30°F).
• The wettest September day on record brought 11 mm (0.4 in) of precipitation to Mendoza (September 21, 2025).

What to Wear in Mendoza in September

For Mendoza in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Some rain is possible, so pack something to handle light showers. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Mendoza in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

5/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our Mendoza's climate page.

More climate data for Mendoza

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Mendoza climate overview or explore weather in Argentina.