Niterói Temperature by Month
The average annual maximum temperature in Niterói, Rio de Janeiro State, Brazil is 29°C (84°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Niterói compares to cities worldwide.
Niterói Monthly Temperatures
The temperature in Niterói changes very little across the seasons, maintaining a similar climate throughout the year. Maximum daytime temperatures range from a comfortable 26°C (79°F) in July to a very warm 32°C (90°F) in February. Nighttime lows range from 24°C (75°F) in February to 18°C (64°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Niterói by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. February, the warmest month of the year, receives 202 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Niterói vs Brazil
The map below shows the annual temperature across Brazil. You can also select individual months if you want to compare a specific time of year.
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Niterói vs World: Temperature Compared
Niterói'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:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Niterói?
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 Niterói, July is the coolest month, with average highs of 26°C (79°F) and humidity around 77% — considered high. In February, the warmest month, temperatures average 32°C (90°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 Niterói's weather — including monthly rainfall, sunshine hours, and humidity — visit our Niterói climate page.
