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Mendoza in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Mendoza in September will be like? Take a look at our weather guide for Mendoza, based on historical data.
Check flight prices to Mendoza on Avionero:
September

Weather in Mendoza in September 2025

Good Weather
Mild
☀️
Sunny
Planning a trip to Mendoza in September? You are in luck! The weather is generally good, with an average maximum temperature of +68°F and approximately 16 sunny days. Just be prepared for some rain, as there are usually around 8 rainy days and 30 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flights in one click on Avionero.

Average weather

☀️
+68°F
Avg. max. temperature
+27°F
Min.
+91°F
Max.
30 mm
Total precipitation
53%
Avg. humidity
2 m/s
Avg. wind
16 ☀️
Sunny Days
5 ⛅️
Cloudy
8 🌦
Rainy
Our opinion: Mendoza has good weather in September.

Average temperature in Mendoza in September

Here are the expected maximum, average and minimum temperatures in Mendoza for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +88°F during the day to a minimum of +36°F during the night, the temperature in September averages around +68°F.

The average maximum temperature goes down 3% by the end of the month, compared with the beginning of the month, from +73°F to +72°F.

Is Mendoza warm or cold in September?

Mendoza is typically mild in September.

Maximum temperatures go up compared to the previous month from +63°F to +68°F. The minimum temperature also goes up from +41°F to +46°F.

Pack a light jacket as it will be warm in the day and cool in the evenings.

Take a look at how September is compared to other months in Mendoza:

Climate in Mendoza in September

Mendoza weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+63°F+68°F+75°F
Min. temperature
+23°F+27°F+32°F
Max. temperature
+90°F+91°F+99°F
Rainfall
23 mm30 mm43 mm
Wind
1 m/s2 m/s2 m/s
Humidity
58%53%49%
Air pressure
1016 HPa1015 HPa1012 HPa
Sunny days
181616
Cloudy days
656
Rainy days
689
Snowy days
100

September typically has worse weather conditions compared to August. It’s getting warmer as September arrives. The average maximum temperature goes up from +63°F to +68°F during the day. Prepare for more rain. Average rainfall goes from 23 mm to 30 mm. It feels drier, as humidity decreases from 58% to 53%. Winds are stronger in comparison to August, going up from 1 m/s to 2 m/s on average. The days becoming less sunny, going from 18 sunny days in August to 16 in September.

October brings much the same weather, it remains good.

Wind

Wind speed in Mendoza in September based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Mendoza is gradually increasing during September, going from 1 m/s to 2 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Mendoza based on historical data.
Last Year
Historical Data
Typically, there is a 17% chance of rain on an average day in September, with total rainfall of approximately 9 mm. The maximum amount of rainfall per day is around 3 mm, which is considered light rain. On average, there are about 5 rainy days during September, so prepare to bring an umbrella.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Mendoza wettest month is March, where a typical day has a 32% chance of precipitation and 59 mm of rainfall per day. June, on the other hand, is the driest month with a mere 20% chance of precipitation and 17 mm of rainfall per day.

How was the weather last September in Mendoza?

This is the weather in Mendoza in September 2023:
1 September
☀️
+74°F
2 September
☀️
+61°F
3 September
☀️
+65°F
4 September
☁️
+57°F
5 September
☁️
+52°F
6 September
☁️
+63°F
7 September
☀️
+60°F
8 September
☁️
+63°F
9 September
☀️
+75°F
10 September
☀️
+78°F
11 September
☀️
+73°F
12 September
☁️
+63°F
13 September
☀️
+64°F
14 September
☀️
+74°F
15 September
☀️
+84°F
16 September
☀️
+88°F
17 September
☀️
+68°F
18 September
☁️
+60°F
19 September
☀️
+69°F
20 September
☀️
+71°F
21 September
☀️
+75°F
22 September
☀️
+74°F
23 September
☁️
+73°F
24 September
☁️
+66°F
25 September
☁️
+65°F
26 September
☁️
+63°F
27 September
☀️
+77°F
28 September
☀️
+68°F
29 September
☀️
+66°F
30 September
☀️
+72°F
In September 2023 Mendoza had 20 sunny days, 10 cloudy days, and 0 rainy days. The average maximum temperature was +68°F, with an absolute maximum of +88°F and a minimum of +52°F. The average humidity was 49%, with a maximum of 100% and a minimum of 6%. The average wind speed was 3 m/s, with a maximum of 10 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Mendoza climate has changed over the last 43 years.

The climate in Mendoza in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1984 (+68°F) and the highest in 2023 (+76°F). The driest year was 2003 with only 151 mm of rainfall, and the wettest year was 1984 with 844 mm.

FAQ

Frequently asked questions about the weather in Mendoza in September:

Is September a good time to visit Mendoza?

September is a really good time to go to Mendoza. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Mendoza.

Can you sunbathe in Mendoza in September?

September has mild temperatures in Mendoza. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!

Is Mendoza rainy in September?

Mendoza is usually dry in September. Plan your packing around outdoor activities and exploring.

Is it sunny in Mendoza in September?

The amount of sunny days in Mendoza during September varies; prepare for a mix of clouds and sun.

Other cities in Argentina

Check out the weather for other cities in Argentina.

Monthly weather in Mendoza

Source of the data

For this page, we’ve looked at the typical weather in Mendoza, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.