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Weather in Porto Alegre — today

Tomorrow Day after tomorrow 3 days Week 14 days Month forecast Weather archive

Now in Porto Alegre

☁️

+15°

Overcast

Feels like +14° · humidity 90%

Today 12.9: +18° / +13°

🕐 02:25

Wind

15 km/h

UV index

Air (AQI)

18 · Excellent

Precipitation

16%

Humidity

90%

Pressure

1014 hPa

Sunrise / sunset

06:26 / 18:15

👕 What to wear today

Comfortable — a T-shirt, a light sweater for the evening.

Weather for an activity:

🎣 fishing 🏃 a run 📸 a photo shoot 🚶 a walk

Detailed weather information for Porto Alegre

Today, 12 September, Saturday, in Porto Alegre (Brazil): cloudy, light rain in places, moderately warm. During the day the air will warm up to +18°, at night around +13°. Due to the wind it feels like +14°. Wind up to 20 km/h. No precipitation expected, you won't need an umbrella. A T-shirt is comfortable during the day, but take a light sweater or windbreaker for the evening. The sun will rise at 06:26 and set at 18:15 — daylight lasts 12 hours.

Hourly weather in Porto Alegre

💧 The bars at the bottom show the hourly precipitation probability. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).

Weather in Porto Alegre for 14 days

Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).

▶

Today 12.9

🌦️

💧 16%

+13° +18°

Morning

☁️

+14°

Day

🌦️

+18°

Evening

🌇

+14°

Night

🌙

+13°

Drizzle · precipitation 16% · wind up to 20 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Tomorrow 13.9

🌦️

💧 65%

+12° +16°

Morning

☁️

+13°

Day

🌦️

+16°

Evening

🌇

+13°

Night

🌙

+12°

Drizzle · precipitation 65% · wind up to 20 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Mon 14.9

🌦️

💧 48%

+11° +17°

Morning

🌦️

+13°

Day

🌦️

+17°

Evening

🌇

+16°

Night

🌙

+11°

Drizzle · precipitation 48% · wind up to 9 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Tue 15.9

🌦️

💧 28%

+11° +18°

Morning

🌦️

+14°

Day

🌦️

+18°

Evening

🌇

+16°

Night

🌙

+11°

Drizzle · precipitation 28% · wind up to 21 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Wed 16.9

☁️

💧 10%

+9° +15°

Morning

☁️

+11°

Day

☁️

+15°

Evening

🌇

+14°

Night

🌙

+9°

Overcast · precipitation 10% · wind up to 12 km/h.
🧥 Cool. You'll need a warm jacket; it can get chilly in the evening.

▶

Thu 17.9

🌤️

+7° +19°

Morning

🌤️

+11°

Day

🌤️

+19°

Evening

🌇

+16°

Night

🌙

+7°

Mostly clear · precipitation 0% · wind up to 14 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Fri 18.9

☁️

💧 2%

+9° +24°

Morning

☁️

+15°

Day

☁️

+24°

Evening

🌇

+20°

Night

🌙

+9°

Overcast · precipitation 2% · wind up to 11 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Sat 19.9

☁️

💧 38%

+12° +24°

Morning

☁️

+16°

Day

☁️

+24°

Evening

🌇

+21°

Night

🌙

+12°

Overcast · precipitation 38% · wind up to 10 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Sun 20.9

🌦️

💧 39%

+15° +17°

Morning

🌦️

+16°

Day

🌦️

+17°

Evening

🌇

+17°

Night

🌙

+15°

Rain showers · precipitation 39% · wind up to 14 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Mon 21.9

🌦️

💧 46%

+16° +24°

Morning

🌦️

+19°

Day

🌦️

+24°

Evening

🌇

+22°

Night

🌙

+16°

Drizzle · precipitation 46% · wind up to 28 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Tue 22.9

🌦️

💧 43%

+12° +17°

Morning

🌦️

+14°

Day

🌦️

+17°

Evening

🌇

+16°

Night

🌙

+12°

Drizzle · precipitation 43% · wind up to 35 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Wed 23.9

☁️

💧 14%

+11° +20°

Morning

☁️

+14°

Day

☁️

+20°

Evening

🌇

+18°

Night

🌙

+11°

Overcast · precipitation 14% · wind up to 17 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Thu 24.9

☁️

💧 14%

+14° +25°

Morning

☁️

+18°

Day

☁️

+25°

Evening

🌇

+22°

Night

🌙

+14°

Overcast · precipitation 14% · wind up to 15 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Fri 25.9

☁️

💧 20%

+15° +26°

Morning

☁️

+19°

Day

☁️

+26°

Evening

🌇

+23°

Night

🌙

+15°

Overcast · precipitation 20% · wind up to 15 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

🗺️ Precipitation radar

Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.

Rain intensity:lightmoderateheavy

🎯 What to do in this weather — indices of the day

Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.

🏃 Running

82 / 100

comfort for running · Excellent

🧴 UV

moderate · low

☂️ Rain

16%

unlikely · low

✨ Stars

77 / 100

evening visibility · Good

🧺 Laundry drying

20 / 100

will dry outside · So-so

🚗 Car wash

76 / 100

no rain expected · Good

🌫️ Air quality

Excellent air

European AQI

PM2.5: 4PM10: 5O₃: 54NO₂: 2

The air is clean — you can walk and exercise outside.

🌅 Sun, moon and sea

Sunrise

06:26

Sunset

18:15

Golden hour

17:43

Daylight

12 h (+2 min vs yesterday)

Porto Alegre climate by month

Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.

+29°

+21°

Jan

+29°

+21°

Feb

+28°

+19°

Mar

+25°

+17°

Apr

+21°

+13°

May

+19°

+11°

Jun

+18°

+10°

Jul

+21°

+11°

Aug

+22°

+13°

Sep

+24°

+15°

Oct

+26°

+17°

Nov

+28°

+19°

Dec

swipe sideways →

Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit

Month	Day	Night	Precipitation	What to pack and what makes the month notable (events, nuances)
January	+29°	+21°	139 mm	Gentle warmth — about +29° daytime, great walking weather. Frequent rain (139 mm over the month) — keep indoor backup plans. 😊 light summer clothing. This is the hottest month of the year in Porto Alegre.
February	+29°	+21°	127 mm	A comfortable month: +29° by day without exhausting heat. One of the wettest months (127 mm): downpours can derail plans. 😊 light summer clothing.
March	+28°	+19°	111 mm	Warm and comfortable: +28° by day, +19° at night. It's a rainy month (111 mm) — an umbrella is a must. 😊 light summer clothing. Weather-wise, one of the three best months to visit.
April	+25°	+17°	107 mm	Ideal weather: +25° daytime — neither hot nor cold. Frequent rain (107 mm over the month) — keep indoor backup plans. 😊 light summer clothing. Weather-wise, one of the three best months to visit.
May	+21°	+13°	108 mm	The most pleasant season: +21° by day, comfortable all day long. One of the wettest months (108 mm): downpours can derail plans. 🙂 a sweater for the evening.
June	+19°	+11°	118 mm	One of the best times to visit: +19° by day, fresh nights. It's a rainy month (118 mm) — an umbrella is a must. 🙂 a sweater for the evening. The shortest daylight of the year — it gets dark early.
July	+18°	+10°	141 mm	Ideal weather: +18° daytime — neither hot nor cold. Frequent rain (141 mm over the month) — keep indoor backup plans. 🙂 a sweater for the evening. This is the coldest month of the year.
August	+21°	+11°	122 mm	The most pleasant season: +21° by day, comfortable all day long. One of the wettest months (122 mm): downpours can derail plans. 🙂 a sweater for the evening.
September	+22°	+13°	148 mm	One of the best times to visit: +22° by day, fresh nights. It's a rainy month (148 mm) — an umbrella is a must. 🙂 a sweater for the evening.
October	+24°	+15°	174 mm	Ideal weather: +24° daytime — neither hot nor cold. Frequent rain (174 mm over the month) — keep indoor backup plans. 🙂 a sweater for the evening. Statistically the wettest month of the year.
November	+26°	+17°	124 mm	A comfortable month: +26° by day without exhausting heat. One of the wettest months (124 mm): downpours can derail plans. 😊 light summer clothing. Weather-wise, one of the three best months to visit.
December	+28°	+19°	123 mm	Warm and comfortable: +28° by day, +19° at night. It's a rainy month (123 mm) — an umbrella is a must. 😊 light summer clothing. The longest daylight hours of the year — more time for everything.

When to visit Porto Alegre

✅ Recommended time to visit

🌟 Best time: March, April, November

Daytime air+25…+28°

Precipitationoften

Why: comfortable +25…+28° by day, little rain.

⚠️ Doable, with caveats

🌤️ Shoulder season: January, February, May, June, August, December

Daytime air+19…+29°

Precipitationoften

Why: noticeable rain risk (108–139 mm/month) — pack an umbrella and backup plans.

🔴 Not the best time

🌤️ Shoulder season: July, September, October

Daytime air+18…+24°

Precipitationoften

Why: the rainy season (141–174 mm/month) — downpours almost daily.

Bottom line: the best time to visit Porto Alegre is March, April, November, and the most comfortable months are March, April, November. The toughest months to visit are July, September, October: frequent rain.