What is the weather like in Colombo vs Mirissa in September?

In September, Colombo averages 30°C high / 26°C low with about 238 mm of rain; Mirissa averages 29°C high / 25°C low with about 191 mm.

Colombo vs Mirissa in September

Mirissa is the better pick in September — 76 vs 55 on SeasonMap's comfort score. Mirissa is hot, soaked, clean air, while Colombo is sweltering, soaked, clean air.

Colombo vs Mirissa — September climate, side by side

	🇱🇰 Colombo	🇱🇰 Mirissa
Comfort score	55/100 (D)	76/100 (B)
Feels-like high	35°C	33°C
Avg high / low	30° / 26°	29° / 25°
Rainfall	238 mm	191 mm
Rainy days	28	27
Humidity	86%	86%
Air quality (AQI)	50	40

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Colombo vs Mirissa in September — FAQ

Is September better in Colombo or Mirissa?: Mirissa is the better pick in September — 76 vs 55 on SeasonMap's comfort score. Mirissa is hot, soaked, clean air, while Colombo is sweltering, soaked, clean air.
What is the weather like in Colombo vs Mirissa in September?: In September, Colombo averages 30°C high / 26°C low with about 238 mm of rain; Mirissa averages 29°C high / 25°C low with about 191 mm.