About Porto Alegre's weather: Summer: 20C. at night to 30C. at day...can reach till 38C.at some days!!! Fall: 16C. at night to 25C at day. Winter: 8C. at night to 22 at day...can reach 0C. at some nights!!! Spring: 15C. at night to 24C. at day. Rainfall well distributed around the year...but usually summer is bit more dry and winter is bit more rainny. For March, expect 17C. to 27C.
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