Will I be cold?
Will I be cold in São Paulo in April?
Verdict
No — No, comfortable.
Lows stay near 62°F — you won't be reaching for the puffer.
Day vs. night
Day
77°F
Warm
Breathable fabrics; sunscreen matters more than a jacket.
Night
62°F
Comfortable
Comfortable outside without an extra layer.
Why
São Paulo in April averages highs of 77°F, lows of 62°F, 9 rainy days.
You can pack for the daytime temps and not worry about the evening dip.