Will I be cold?
Will I be cold in Mumbai in December?
Verdict
No — No, comfortable.
Lows stay near 66°F — you won't be reaching for the puffer.
Day vs. night
Day
88°F
Hot
Prioritize shade, hydration, and a brim.
Night
66°F
Comfortable
Comfortable outside without an extra layer.
Why
Mumbai in December averages highs of 88°F, lows of 66°F, 1 rainy days.
You can pack for the daytime temps and not worry about the evening dip.