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Porto Alegre weather

Rio Grande do Sul · 1,488,252 inhabitants · Thursday, October 29 · updated 14:06

Air: Good Low storm risk · Tue, Wed

20°

Partly cloudy

Feels like 20°C

Wind

10 km/h

Gusts

13 km/h

Humidity

75 %

Pressure

1020 hPa

Clouds

63 %

Storm

Rise 05:32 Set 18:44 Day 13 h 12 min UV 3 · Moderate

Morning, afternoon, evening

Trend

Afternoon

Partly cloudy

22°

Feels like 26°

Wind ↑ SSE 17 km/h

Humidity 63 %

Evening

Partly cloudy

20°18°

Feels like 20°

Wind ↑ ESE 16 km/h

Gusts 29 km/h

Humidity 69 %

💧 0.1 mm

15:00

22°

SSE 17

18:00

20°

SSE 16

Porto Alegre forecast in charts · next 7 days

The week ahead: highs and lows

≈ A week close to the usual temperatures

Highs Lows Usual for the season (1991–2020 average)

Hourly detail

Temperature (°C) Rain (mm) Wind (km/h)

Porto Alegre climate: what a normal year looks like

The hottest stretch is January, when afternoons average 30 °C; the coldest is July, when nights average 10 °C.

There is no real dry season: monthly rainfall stays between 108 mm and 171 mm on average.

A normal year brings roughly 1,560 mm of rain — more than 78% of the towns of 20,000+ people we compared it with.

From 10 h 12 min of daylight in late June to 14 h 05 min in late December.

The coming week looks normal for October: forecast highs average 25 °C, against a usual 25 °C.

30-year averages (1991–2020)
Month	Typical high	Typical low	Rainfall
Jan	30 °C	21 °C	140 mm
Feb	29 °C	21 °C	132 mm
Mar	28 °C	20 °C	116 mm
Apr	26 °C	17 °C	108 mm
May	22 °C	14 °C	110 mm
Jun	20 °C	12 °C	116 mm
Jul	19 °C	10 °C	141 mm
Aug	22 °C	11 °C	122 mm
Sep	21 °C	13 °C	150 mm
Oct	25 °C	16 °C	171 mm
Nov	27 °C	17 °C	126 mm
Dec	29 °C	20 °C	128 mm
Whole year	25 °C	16 °C	1,560 mm

Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 30.03° S, 51.23° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.

Air you breathe in Porto Alegre: pollution and pollen

1/6

Good

European Air Quality Index (EAQI), from Copernicus CAMS

PM2.59µg/m³

PM1013µg/m³

Copernicus CAMS model, updated several times a day.

Rain radar around Porto Alegre

Rain observed over the last two hours by official weather radars around Porto Alegre, followed by the radar forecast for the next hour where the weather service provides one.

Rain radar Last two hours, then forecast where available · drag the timeline

No open weather radar covers Porto Alegre yet: the map shows our hour-by-hour rain forecast (ICON, GFS).

Moon over Porto Alegre

Waning gibbous

87 % illuminated · 18.3 days

Rise 16:47 Set 01:56

Fri 30/10 79%

Sat 31/10 69%

Sun 1/11 59%

Mon 2/11 49% Last quarter

Tue 3/11 38%

Wed 4/11 28%

Thu 5/11 19%

Fri 6/11 12%

Sat 7/11 6%

Sun 8/11 2%

Mon 9/11 0%

Tue 10/11 1% New moon

Moonrise and moonset in local time (America/Sao_Paulo); phase and lit fraction from a synodic calculation.

Look up a past day in Porto Alegre

Curious about the weather in Porto Alegre on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.

Porto Alegre weather at a glance

This page gathers everything about the weather in Porto Alegre, Rio Grande do Sul: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “partly cloudy”, it is 20 °C (feels like 20 °C) and the wind blows at 10 km/h.

Expected range today: 15 °C to 22 °C and a dry sky; keep an eye on thunderstorms. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.

Other big cities nearby

Canoas 14 km 20°

Caxias do Sul 96 km 17°

Pelotas 220 km 18°

Porto Alegre weather data for developers

Use the Porto Alegre forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.

Create a free key

Where does this forecast come from? Our engine, checked every day against 1125 weather stations