The climate of Porto Alegre is sub-tropical humid highly variable but with regular rainfall, hot and humid summers and mild winters. Temperatures, as compared to other locations in Brazil, vary greatly due to the position very south of the city. The average maximum temperatures vary between 30 ° C during the months of January and February to 19 ° C in the month of June. The average minimum temperatures vary between 21 ° C in February and 11 ° C in June, July and August.
Rainfall is well distributed throughout the year, the only relatively driest months are those of April and May, while the wettest months are those of August and September. The average annual rainfall is 1,300 mm, in Porto Alegre there are 101 rainy days per year and the rainy days varies between 7 day in April and 10 days of rain in September. The humidity varies between 66 % in December and 79 % in June, July and August. The city has 2,244 hours of sunshine per year. Snow is a very rare event it falls normally 2-3 times every 100 years.
The temperature of the sea in Porto Alegre is maintained between 25 ° C and 23 ° C in the months between December and April, while in winter (July to September) the sea water has a temperature of 17 ° C.
WHEN TO GO TO PORTO ALEGRE
Any time of year is suitable for visiting Porto Alegre, but the best time to visit the city are the hottest months between October and May.
PORTO ALEGRE CLIMATIC TABLES
|PORTO ALEGRE (10 metres)|
|Month||Average low (°C)||Average high (°C)||Precip. (mm)||Precip. days|