Montevideo Temperature by Month

Montevideo in Montevideo, Uruguay sees significant seasonal temperature differences, with daytime highs between 15°C (59°F) in July and 27°C (81°F) in January, averaging 21°C (70°F) annually. Explore the full monthly breakdown below.

Depending on the time of the year, temperatures range from warm to mild in Montevideo. Nighttime lows follow the same pattern, ranging from 19°C (66°F) to 8°C (46°F).

The chart below illustrates the average maximum day and minimum night temperatures in Montevideo by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. January, the warmest month, averages 293 hours of sunshine.

The chart below shows the average temperature throughout the year:

Montevideo's average annual maximum temperature is 21°C (70°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Montevideo, July is the coolest month, with average highs of 15°C (59°F) and humidity around 80%, considered very high. In January, the warmest month, temperatures average 27°C (81°F) with 70% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Montevideo's weather, including monthly rainfall, sunshine hours, and humidity, visit our Montevideo climate page.