Today's Weather Forecast - Porto Alegre

Today's weather in Porto Alegre. high 19°C (66°F), low 15°C (59°F). Thunderstorm.

Today’s Hourly Weather Outlook

Morning6 AM – Noon17°
Wind speed
15 km/h
Rain probability
100%
AfternoonNoon – 6 PM19°
Wind speed
12 km/h
Rain probability
100%
Evening6 PM – Midn16°
Wind speed
19 km/h
Rain probability
75%
NightMidn – 6 AM16°
Wind speed
7 km/h
Rain probability
63%

24-Hour Rain & Temperature Forecast

Sunrise & Sunset

Sunrise
Dawn 5:57 AM
Total Daylight
52% of day elapsedSolar noon 12:21 PM
Sunset
Dusk 6:45 PM
Remaining5h 43m
Solar elevation55°
vs yesterday+2 min

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Porto Alegre is forecast to reach a high of 19°C today, with an overnight low around 15°C. That's 3° below the long-term average high of 22°C for this time of year. It continues a recent pattern — 10 of the last 28 days with published data have run cooler than normal. Expect a high chance of rain (100% probability) and a gentle breeze averaging 19 km/h. Air quality is currently good (AQI 22), with no notable outdoor health concerns.

Today vs Normal

19°C-3° below normal

The long-term average high for today is 22°C.

10 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running below normal.

2026-08-28: 23°C23°2026-08-29: 17°C17°2026-08-30: 22°C22°2026-08-31: 20°C20°2026-09-01: 19°C19°2026-09-02: 21°C21°2026-09-03: 25°C25°2026-09-04: 20°C20°2026-09-05: 18°C18°2026-09-06: 14°C14°2026-09-07: 16°C16°2026-09-08: 20°C20°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.