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Rio Grande do Sul (Rio Grande)
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Weather in Rio Grande do Sul for September 2026

Your guide to Rio Grande do Sul weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Rio Grande do Sul at the beginning of September is 16.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 17.7 °C by the end of September.

    • Rain 🌧️

  • The climate of Rio Grande do Sul in September is notably wet, with an average of 13 rainy days, and a total of 112.5 mm of precipitation.

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/13°
Temperatures
Average wind speed
28 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Rio Grande do Sul Weather September

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

Temperatures trend during September in Rio Grande do Sul

See the weather trend as well as the moving average line

September weather in Rio Grande do Sul day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 18° /16° 0.2 mm 5
2 Sept. Patchy light drizzle
Patchy light drizzle
 20° /16° 4.6 mm 6
3 Sept. Light rain shower
Light rain shower
 20° /16° 27.3 mm 6
4 Sept. Moderate rain
Moderate rain
 17° /11° 33.8 mm 5
5 Sept. Overcast
Overcast
 12° /8° 0 mm 4
6 Sept. Patchy rain possible
Patchy rain possible
 12° /8° 0 mm 4
7 Sept. Light rain shower
Light rain shower
 16° /11° 0.6 mm 5
8 Sept. Light rain shower
Light rain shower
 16° /15° 19.4 mm 5
9 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 0 mm 5
10 Sept. Sunny
Sunny
 18° /11° 0 mm 6
11 Sept. Sunny
Sunny
 18° /12° 0 mm 6
12 Sept. Partly cloudy
Partly cloudy
 14° /10° 0 mm 5
13 Sept. Partly cloudy
Partly cloudy
 18° /12° 0 mm 6
14 Sept. Overcast
Overcast
 18° /15° 0 mm 5
15 Sept. Patchy light drizzle
Patchy light drizzle
 19° /15° 0.3 mm 5
16 Sept. Patchy rain possible
Patchy rain possible
 19° /14° 0 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
 20° /16° 0 mm 6
18 Sept. Partly cloudy
Partly cloudy
 20° /17° 0 mm 7
19 Sept. Patchy rain possible
Patchy rain possible
 23° /16° 1.3 mm 6
20 Sept. Light rain shower
Light rain shower
 20° /18° 1.3 mm 6
21 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 21° /14° 12.5 mm 6
22 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 0.7 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 0 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 0 mm 5
25 Sept. Partly cloudy
Partly cloudy
 16° /9° 0 mm 6
26 Sept. Cloudy
Cloudy
 18° /14° 0 mm 5
27 Sept. Patchy rain possible
Patchy rain possible
 18° /16° 1.3 mm 5
28 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 20° /14° 6.8 mm 6
29 Sept. Sunny
Sunny
 19° /12° 0 mm 6
30 Sept. Light rain shower
Light rain shower
 18° /14° 2.4 mm 5
Next
Important Notice
Our weather forecast for Rio Grande do Sul 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 Rio Grande do Sul forecast closer to your planned date for the most up-to-date weather information.
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Rio Grande do Sul in September - FAQ

What are the expected maximum and minimum temperatures in Rio Grande do Sul during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rio Grande do Sul during September?
Significant rainfall exceeding 112.5 mm is expected in Rio Grande do Sul during September, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Rio Grande do Sul during September?
The average wind speed in Rio Grande do Sul during September is 28 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Rio Grande do Sul

Explore the daily rainfall trends and prepare for Rio Grande do Suls September weather 💧
Typically, Rio Grande do Sul has 13 rainy days in September with a total of 112.5 mm of rainfall.

UV exposure in Rio Grande do Sul during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Rio Grande do Sul?

Get accurate weather forecasts for Rio Grande do Sul, located at latitude -32.035 and longitude -52.099. Stay updated with localized weather information tailored for Rio Grande do Sul.

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