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Weather in Rio de Janeiro for September 2025

Your guide to Rio de Janeiro weather in September - trends and predictions
  • In general, the average temperature in Rio de Janeiro at the beginning of September is 26.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 28 °C by the end of September.

  • Rio de Janeiro sees moderate rainfall in September, averaging 8 rainy days.

  • Is September a good time to visit Rio de Janeiro? check out the best time to travel to Rio de Janeiro page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/20°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Rio de Janeiro in September average weather

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Temperatures trend during September in Rio de Janeiro

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
27° /18° 0 mm 8
2 Sept. Sunny
Sunny
26° /19° 0.2 mm 7
3 Sept. Sunny
Sunny
26° /20° 0 mm 8
4 Sept. Sunny
Sunny
29° /20° 0 mm 8
5 Sept. Light drizzle
Light drizzle
29° /20° 0.6 mm 7
6 Sept. Light rain shower
Light rain shower
22° /19° 3.5 mm 6
7 Sept. Patchy rain possible
Patchy rain possible
26° /19° 0.4 mm 7
8 Sept. Sunny
Sunny
29° /20° 0 mm 8
9 Sept. Sunny
Sunny
28° /20° 0 mm 8
10 Sept. Sunny
Sunny
28° /20° 0 mm 8
11 Sept. Sunny
Sunny
30° /21° 0 mm 8
12 Sept. Sunny
Sunny
31° /21° 0 mm 8
13 Sept. Sunny
Sunny
32° /22° 0 mm 9
14 Sept. Overcast
Overcast
31° /21° 0 mm 8
15 Sept. Overcast
Overcast
23° /19° 1.9 mm 6
16 Sept. Partly cloudy
Partly cloudy
26° /18° 1.3 mm 7
17 Sept. Sunny
Sunny
25° /20° 1.3 mm 7
18 Sept. Sunny
Sunny
27° /20° 0.3 mm 7
19 Sept. Sunny
Sunny
27° /19° 0 mm 8
20 Sept. Sunny
Sunny
27° /20° 0 mm 8
21 Sept. Sunny
Sunny
28° /21° 0.8 mm 7
22 Sept. Sunny
Sunny
29° /21° 0 mm 8
23 Sept. Sunny
Sunny
28° /22° 0 mm 8
24 Sept. Sunny
Sunny
31° /22° 0 mm 8
25 Sept. Partly cloudy
Partly cloudy
29° /22° 0 mm 8
26 Sept. Partly cloudy
Partly cloudy
30° /22° 0.2 mm 8
27 Sept. Partly cloudy
Partly cloudy
33° /22° 0.5 mm 9
28 Sept. Light rain shower
Light rain shower
22° /20° 3.9 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
24° /19° 0.3 mm 6
30 Sept. Patchy rain possible
Patchy rain possible
27° /18° 0 mm 7
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Important Notice
Our weather forecast for Rio de Janeiro 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 de Janeiro forecast closer to your planned date for the most up-to-date weather information.

Guide for Rio de Janeiro in September

In September, Rio de Janeiro, Brazil experiences a transition from the tail end of winter to the beginning of spring. At the start of the month, the weather in Rio de Janeiro is generally mild and comfortable, with average temperatures ranging from 18° to 25°.

The city sees relatively low precipitation during this time, making it an ideal period for outdoor activities and sightseeing. However, occasional light showers can be expected, so it's advisable to carry an umbrella or light rain jacket.

As the month progresses, Rio de Janeiro begins to witness a gradual increase in temperatures, with averages climbing to around 20° to 28°. The city also experiences longer daylight hours, providing ample opportunities for beach visits and outdoor excursions.

The sea temperature also starts to rise, making it more inviting for swimming and water sports.

Overall, September in Rio de Janeiro offers pleasant weather conditions, making it a great time to explore the city's vibrant culture, stunning beaches, and lush landscapes. However, it's important to stay updated on the local weather forecasts, as occasional changes in weather patterns can occur.

Rio de Janeiro in September - FAQ

Is September a good time to visit Rio de Janeiro?
Yes, September is a good time to traveling to Rio de Janeiro, read more about the best time to visit Rio de Janeiro.
What are the expected maximum and minimum temperatures in Rio de Janeiro during September?
During September, expect a variety of temperatures with highs around 27° and lows near 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in Rio de Janeiro during September?
Expect minimal rainfall in Rio de Janeiro during September, with a total of 17.6 mm over approximately 8 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Rio de Janeiro during September?
The average wind speed in Rio de Janeiro during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Rio de Janeiro in September?

As you prepare for your trip to Rio de Janeiro in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Rio de Janeiro, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

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Location coordinates Where is Rio de Janeiro?

Get accurate weather forecasts for Rio de Janeiro, located at latitude -22.906 and longitude -43.182. Stay updated with localized weather information tailored for Rio de Janeiro.

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