Weather in Lima

Lima is in Peru at 12.0°S. The 2001–2020 NASA POWER daily record describes a desert climate with almost no rain. Rain is a year that totals only 24 mm of rain. The wettest month is February at 5 mm; the driest is September at 1 mm.

March is the warmest month (average 20.7°C, high 24.1°C) and July is the coolest (average 17.3°C, low 12.9°C). From the coolest night in July (12.9°C) to the hottest afternoon in March (24.1°C), the raw range is 11.2°C. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are February, March, and April.

Hot and cool months in Lima

Monthly average highs run from 21.7°C in July to 24.1°C in March. Nights follow the same curve: 12.9°C in July and 17.3°C in March.

Across the year the mean afternoon high is 22.6°C. If you want the smallest day–night shock, look at months where the high and low sit close together; March nights still hold 17.3°C.

When Lima gets wet

Lima is dry. The whole year adds up to 24 mm. February is the “wet” month at 5 mm; September drops to 1 mm.

Humidity peaks near 76%. That usually lines up with the wetter months rather than the hottest ones.

The calendar in Lima

February is the wettest month — 5 mm and 1 rainy days, with 76% humidity. Peak heat arrives in March: 24.1°C by day, 17.3°C at night, and 74% humidity.

The year bottoms out in July. Plan for 12.9°C at night and 21.7°C in the afternoon. September is the driest month, averaging only 1 mm across 0 rainy days. Highs sit near 22.0°C.

When the score favours a visit

The three months with the highest comfort score are February, March, and April: February (20.6°C average, 5 mm, 76% humidity); March (20.7°C average, 5 mm, 74% humidity); April (19.9°C average, 1 mm, 71% 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 prefer the hottest stretch, that is March. The coolest stretch is July.

Lima and other cities in Peru

Lima is the only Peru city in this dataset, so the figures on this page are the national sample we publish. They still come from the same NASA POWER daily series (2001–2020) used everywhere else on the site.