Porto Alegre
May
Weather in Porto Alegre for May 2026
Your guide to Porto Alegre weather in May - trends and predictions
Until now, May 2026 in Porto Alegre is slightly cooler than the historical average by -1.6 °C.
The forecast for the next days in Porto Alegre predicts temperatures to be around 19 °C, close to the historical average.
In general, the average temperature in Porto Alegre at the beginning of May is 25.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °C by the end of May.
Porto Alegre experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 268.8 mm.
Temperatures
Rain 🌧️
9
Dry days
22
Rainy days
0
Snow days
21°/14°
Temperatures
12 km/h
Avg max wind
78 %
Avg humidity
Porto Alegre Weather May
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Temperatures trend during May in Porto Alegre
See the weather trend as well as the moving average line
May weather in Porto Alegre day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Moderate or heavy rain shower | 22° /15° | 25.4 mm | 5 | |
| 2 May |  Heavy rain | 23° /14° | 49.6 mm | 5 | |
| 3 May |  Moderate rain | 21° /13° | 6.7 mm | 5 | |
| 4 May |  Overcast | 24° /14° | 4.4 mm | 5 | |
| 5 May |  Light rain shower | 28° /17° | 10.4 mm | 6 | |
| 6 May |  Sunny | 29° /18° | 0.3 mm | 7 | |
| 7 May | Sunny | 30° /20° | 0 mm | 7 | |
| 8 May | Light rain shower | 28° /17° | 4.4 mm | 6 | |
| 9 May |  Cloudy | 20° /13° | 5 mm | 5 | |
| 10 May | Moderate or heavy rain shower | 18° /12° | 12.1 mm | 5 | |
| 11 May | Light rain shower | 18° /11° | 8.8 mm | 5 | |
| 12 May | Sunny | 22° /12° | 9.8 mm | 5 | |
| 13 May | Sunny | 21° /11° | 1.7 mm | 5 | |
| 14 May | Overcast | 20° /11° | 0 mm | 5 | |
| 15 May | Overcast | 20° /12° | 0 mm | 5 | |
| 16 May |  Light rain | 20° /12° | 2 mm | 5 | |
| 17 May | Light rain shower | 20° /14° | 5.8 mm | 4 | |
| 18 May | Patchy rain possible | 20° /13° | 3 mm | 5 | |
| 19 May | Patchy rain possible | 19° /11° | 0.1 mm | 5 | |
| 20 May | Sunny | 18° /10° | 3.5 mm | 4 | |
| 21 May | Patchy rain possible | 20° /12° | 0.1 mm | 6 | |
| 22 May |  Partly cloudy | 18° /9° | 0.1 mm | 4.1 | |
| 23 May | Patchy rain possible | 19° /11° | 0.8 mm | 2.2 | |
| 24 May | Patchy rain possible | 21° /15° | 0.2 mm | 3.9 | |
| 25 May | Patchy rain possible | 22° /13° | 1.4 mm | 4 | |
| 26 May | Moderate rain | 19° /14° | 11.4 mm | 0.7 | |
| 27 May | Patchy rain possible | 18° /13° | 0 mm | 4 | |
| 28 May | Sunny | 22° /13° | 0 mm | 6 | |
| 29 May | Sunny | 22° /13° | 0 mm | 6 | |
| 30 May | Cloudy | 17° /14° | 0.1 mm | 4 | |
| 31 May | Patchy rain possible | 17° /12° | 0.1 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Porto Alegre in May 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 Porto Alegre forecast closer to your planned date for the most up-to-date weather information.
Change Month
Porto Alegre in May - FAQ
What are the expected maximum and minimum temperatures in Porto Alegre during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Porto Alegre during May?
Significant rainfall exceeding 268.8 mm is expected in Porto Alegre during May, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Porto Alegre during May?
The average wind speed in Porto Alegre during May is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Porto Alegre
Explore the daily rainfall trends and prepare for Porto Alegres May weather 💧
Typically, Porto Alegre has 22 rainy days in May with a total of 268.8 mm of rainfall.
UV exposure in Porto Alegre during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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