Last and first frost dates in Porto Alegre

Brazil

Porto Alegre had no frost in 2016–2025, so crops are planted by warmth and rain rather than by frost dates.

Last spring frost	none in ten years
First autumn frost	none in ten years

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

There is no frost season here: crops are planted by warmth and rain rather than by frost dates.

When the soil warms up in Porto Alegre

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo).

Soil	Date
5 °C	already in the first week of July
10 °C	already in the first week of July
15 °C	15 July
18 °C	14 August

Frost dates near Porto Alegre

Of the nearest cities on our list, the last spring frost ends earliest in Caxias do Sul (13 July) and latest in Lages (14 August).

City	Distance	Last spring frost	First autumn frost
Caxias do Sul	96 km	13 July	17 June
Pelotas	221 km	—	—
Passo Fundo	228 km	19 July	18 June
Santa Maria	252 km	16 July	13 June
Lages	261 km	14 August	24 June

Seeds, seedlings and markets in Porto Alegre

Within 15 km of Porto Alegre OpenStreetMap lists 3 garden centres, 1 farm-supply shop, 20 markets and 2 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is Floricultura Winge, 10 km away.

Floricultura Winge — garden centre
Rua Doutor Mário Totta 963, 91920-130 · Mon–Sat 08:00–18:00; Sun 09:30–13:00, 14:30–17:30 · 10 km · floriculturawinge.com.br
Mercado Público de Porto Alegre — market
Largo Glênio Peres, 90020-070 · Mon–Fri 07:30–19:30; Sat 07:30–18:30 · 0 km · mercadopublico.com.br
Cultura Natural — farm shop
Rua Santana 53, 90040-370 · Mon–Sat 10:00–18:30 · 2 km
Feira de Antiguidades — market
Sat 08:00–14:00 · 1 km
Mercadão do Produtor — market
Sat 07:00–12:00 · 1 km
Feira Modelo - EPATUR — market
Tue 15:30–20:30 · 1 km

Where to buy seeds and seedlings in Porto Alegre

Weather in Porto Alegre by month

Average weather in Porto Alegre over 2016–2025: the warmest month is January. Months that average 20 °C or more by day: August–May (20.9–30.7 °C). Months that average 30 °C or more by day: January (30.7 °C) and February (30.3 °C). No month averages below 0 °C at night; the coldest nights, in July, average 10.5 °C. About 1488 mm of rain falls in a year, on 130 days; May is the wettest month (176 mm) and February the driest (79 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days
January	30.7	21.7	105	13
February	30.3	21.2	79	11
March	28.3	20.1	117	11
April	25.7	17.6	99	10
May	21.4	13.8	176	11
June	19.5	11.3	149	10
July	19.4	10.5	121	9
August	20.9	11.4	107	10
September	22.7	14.2	174	12
October	24.3	15.9	141	13
November	26.7	17.4	122	10
December	29.4	19.9	98	10

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).