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Weather in Buenos Aires for September 2026

Your guide to Buenos Aires weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Buenos Aires at the beginning of September is 14.7 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18 °C by the end of September.

    • Rain 🌧️

  • Buenos Aires experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 83.3 mm.

Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/11°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Buenos Aires Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
16°
2
Heavy rain
16°
3
Moderate rain
16°
4
Overcast
14°
5
Partly cloudy
12°
6
Partly cloudy
14°
7
Overcast
15°
8
Partly cloudy
16°
9
Overcast
18°
10
Sunny
18°
11
Moderate or heavy rain shower
17°
12
Overcast
15°
13
Partly cloudy
16°
14
Partly cloudy
18°
15
Cloudy
19°
16
Sunny
20°
17
Light rain shower
18°
18
Partly cloudy
18°
19
Patchy rain possible
18°
20
Light drizzle
18°
21
Fog
19°
22
Patchy rain possible
18°
23
Patchy rain possible
17°
24
Partly cloudy
16°
25
Cloudy
17°
26
Light rain shower
15°
27
Partly cloudy
17°
28
Sunny
20°
29
Light drizzle
20°
30
Sunny
21°

Temperatures trend during September in Buenos Aires

See the weather trend as well as the moving average line

September weather in Buenos Aires day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 16° /10° 4.3 mm 5
2 Sept. Heavy rain
Heavy rain
 16° /10° 12.8 mm 5
3 Sept. Moderate rain
Moderate rain
 16° /9° 14.6 mm 5
4 Sept. Overcast
Overcast
 14° /8° 0 mm 4
5 Sept. Partly cloudy
Partly cloudy
 12° /6° 0 mm 4
6 Sept. Partly cloudy
Partly cloudy
 14° /8° 0 mm 5
7 Sept. Overcast
Overcast
 15° /10° 5 mm 4
8 Sept. Partly cloudy
Partly cloudy
 16° /10° 0 mm 5
9 Sept. Overcast
Overcast
 18° /11° 0 mm 5
10 Sept. Sunny
Sunny
 18° /12° 0.3 mm 5
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /11° 8.7 mm 5
12 Sept. Overcast
Overcast
 15° /10° 0 mm 5
13 Sept. Partly cloudy
Partly cloudy
 16° /10° 0.1 mm 5
14 Sept. Partly cloudy
Partly cloudy
 18° /10° 0.1 mm 6
15 Sept. Cloudy
Cloudy
 19° /11° 0.1 mm 5
16 Sept. Sunny
Sunny
 20° /13° 0 mm 6
17 Sept. Light rain shower
Light rain shower
 18° /12° 3 mm 5
18 Sept. Partly cloudy
Partly cloudy
 18° /13° 0.3 mm 6
19 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 3.7 mm 5
20 Sept. Light drizzle
Light drizzle
 18° /13° 9.1 mm 5
21 Sept. Fog
Fog
 19° /12° 0.6 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 18° /12° 3 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0 mm 5
24 Sept. Partly cloudy
Partly cloudy
 16° /11° 0 mm 5
25 Sept. Cloudy
Cloudy
 17° /10° 0 mm 5
26 Sept. Light rain shower
Light rain shower
 15° /11° 4.7 mm 4
27 Sept. Partly cloudy
Partly cloudy
 17° /10° 10.8 mm 5
28 Sept. Sunny
Sunny
 20° /10° 0 mm 6
29 Sept. Light drizzle
Light drizzle
 20° /13° 0.2 mm 5
30 Sept. Sunny
Sunny
 21° /13° 2 mm 6
Next
Important Notice
Our weather forecast for Buenos Aires in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Buenos Aires forecast closer to your planned date for the most up-to-date weather information.
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Buenos Aires in September - FAQ

What are the expected maximum and minimum temperatures in Buenos Aires during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Buenos Aires during September?
Moderate rainfall is anticipated in Buenos Aires during September, with a total of 83.3 mm spread over approximately 6 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Buenos Aires during September?
The average wind speed in Buenos Aires during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Buenos Aires

Explore the daily rainfall trends and prepare for Buenos Airess September weather 💧
Typically, Buenos Aires has 6 rainy days in September with a total of 83.3 mm of rainfall.

UV exposure in Buenos Aires during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Buenos Aires, located at latitude -34.613 and longitude -58.377. Stay updated with localized weather information tailored for Buenos Aires.

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