São João de Meriti Temperature by Month

São João de Meriti, Rio de Janeiro State, Brazil has a consistently comfortable climate year-round, with daytime highs averaging 29°C (84°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.

With little seasonal fluctuation, São João de Meriti offers a predictable and steady climate. Maximum daytime temperatures reach a very warm 33°C (91°F) in February and a comfortable 27°C (81°F) in July. At night, lows range from 23°C (73°F) to 16°C (61°F) throughout the year.

The chart below illustrates the average maximum day and minimum night temperatures in São João de Meriti by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. February, the warmest month, averages 202 hours of sunshine.

The chart below shows the average temperature throughout the year:

São João de Meriti's average annual maximum temperature is 29°C (84°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 São João de Meriti, July is the coolest month, with average highs of 27°C (81°F) and humidity around 77%, considered high. In February, the warmest month, temperatures average 33°C (91°F) with 79% 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 São João de Meriti's weather, including monthly rainfall, sunshine hours, and humidity, visit our São João de Meriti climate page.