Weather in Guayaquil

Guayaquil is in Ecuador at 2.2°S. The 2001–2020 NASA POWER daily record describes a monsoon climate with a sharp wet-dry split. Rain is the monsoon runs from January to April, inside an annual total of 771 mm. The wettest month is February at 215 mm; the driest is September at 2 mm.

September is the warmest month (average 29.3°C, high 37.3°C) and March is the coolest (average 27.3°C, low 23.1°C). From the coolest night in March (21.2°C) to the hottest afternoon in September (37.3°C), the raw range is 16.1°C. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are July, August, and September.

Monsoon and dry months

The monsoon in Guayaquil starts in January and ends in April (January, February, March, and April). February is the core of it at 215 mm. September is the other extreme, with 2 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. February averages 22 such days; September averages 0.

Hot and cool months in Guayaquil

Guayaquil has a 2.0°C gap between its coolest monthly average (27.3°C in March) and its warmest (29.3°C in September). That is a southern-hemisphere pattern.

Mean high across all twelve months is 35.0°C and mean low is 22.2°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

Distinctive months in Guayaquil

January is when the monsoon typically starts in Guayaquil: highs near 34.5°C, and rainfall jumps to 123 mm (17 rainy days). February is the wettest month — 215 mm and 22 rainy days, with 78% humidity. The year bottoms out in March. Plan for 23.1°C at night and 31.5°C in the afternoon.

By April the monsoon is ending. Guayaquil still sees about 126 mm, but the next month is usually leaner. In May, Guayaquil averages 34.2°C by day and 22.5°C at night, with 38 mm of rain. September is the warmest month. Afternoon highs average 37.3°C and nights settle near 21.3°C, with 2 mm of rain.

Best months to visit Guayaquil

The three months with the highest comfort score are July, August, and September: July (29.1°C average, 3 mm, 59% humidity); August (29.2°C average, 3 mm, 57% humidity); September (29.3°C average, 2 mm, 57% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the monsoon itself — fewer crowds, greener landscape, heavier rain — aim at January–April instead of the score.

How Guayaquil compares inside Ecuador

Quito is about 266 km away: Guayaquil is 10.5°C warmer than Quito in its hottest month and 410 mm drier over the year than Quito. Quito’s wettest month is April (177 mm) versus February here.