In September, Santarem typically sees daytime highs of 32.4°C and overnight lows around 22.6°C. Compared to the annual average high of 30.9°C, September runs +1.4°C.
September in Santarem averages a daytime high of 32.4°C and an overnight low of 22.6°C.
September runs +1.4°C compared to Santarem's annual average high of 30.9°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 32.4°C and cooler evenings around 22.6°C.