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Climate Impact Company Week 2-to-4 South America Outlook
Issued: Sunday September 21, 2025
Headline: Dryness returns to Brazil drought zone next week.
Chart of the day: Moderate rains for the Brazil drought area this week.


Discussion: During the past week, Brazil dryness persists. However, GFS indicates 1-2 inches of rain associated with a cold front this week. Heaviest rainfall is forecast for Southeast Brazil.
Week-2 Valid September 28-October 5, 2025: Sharply drier Brazil again.


Discussion: ECM ENS projects a warmer than normal regime across Argentina despite wet weather across northern sections. Brazil sharply reverses drier (again).
Week-3 Valid October 5-12, 2025: Brazil dryness and heat.


Discussion: Anomalous heat and dryness are centered on the Brazil drought area as high pressure dominates that area. Wet weather lingers across Northern Argentina.
Week-4 Valid October 5-12, 2025: Dry/hot Brazil.


Discussion: Chance of showers, based on the ECM forecast, for North-central Brazil and Northern Argentina. Most of the Brazil drought zone stays drier and hotter than normal.
