Weather in Montevideo

Montevideo is in Uruguay at 34.9°S. The 2001–2020 NASA POWER daily record describes a mild oceanic climate. January is the warmest month (average 23.1°C, high 26.3°C) and July is the coolest (average 10.4°C, low 8.3°C).

Rain is wet season runs from January to April, inside an annual total of 1183 mm. The wettest month is March at 118 mm; the driest is May at 84 mm. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are December, January, and February.

Rain through the year

The wet season in Montevideo starts in January and ends in April (January, February, March, and April). March is the core of it at 118 mm. May is the other extreme, with 84 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. March averages 10 such days; May averages 8.

How warm Montevideo gets

The heat peaks in January, when the typical afternoon is 26.3°C. The opposite pole is July, when mornings average 8.3°C.

Mean high across all twelve months is 19.5°C and mean low is 14.3°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

What stands out month by month

January is when the wet season typically starts in Montevideo: highs near 26.3°C, and rainfall jumps to 102 mm (9 rainy days). March is the wettest month — 118 mm and 10 rainy days, with 77% humidity.

May is the driest month, averaging only 84 mm across 8 rainy days. Highs sit near 16.8°C. The year bottoms out in July. Plan for 8.3°C at night and 12.5°C in the afternoon.

Best months to visit Montevideo

The three months with the highest comfort score are December, January, and February: December (21.3°C average, 86 mm, 72% humidity); January (23.1°C average, 102 mm, 72% humidity); February (22.9°C average, 105 mm, 75% humidity). Those months sit across the year end, so they are listed in season order rather than January-to-December. 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 wet season itself — fewer crowds, greener landscape, heavier rain — aim at January–April instead of the score.

How Montevideo compares inside Uruguay

Montevideo is the only Uruguay 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.