🇧🇷 Weather in Niterói
Map Overlays:
Hourly Forecast for Niterói
20:00
18°
8%
21:00
18°
9%
22:00
17°
10%
23:00
17°
12%
00:00
17°
12%
01:00
17°
12%
02:00
16°
12%
03:00
16°
12%
04:00
16°
12%
05:00
16°
12%
06:00
16°
12%
07:00
16°
11%
08:00
18°
8%
09:00
20°
5%
10:00
22°
4%
11:00
23°
3%
12:00
24°
2%
13:00
25°
2%
14:00
25°
2%
15:00
25°
3%
16:00
24°
4%
17:00
22°
6%
18:00
21°
7%
19:00
20°
8%
14-Day Forecast for Niterói
2026-07-09
Sunny
22° /
17°
2026-07-10
Sunny
25° /
16°
2026-07-11
Smoky haze
24° /
18°
2026-07-12
Smoky haze
24° /
20°
2026-07-13
Light rain shower
20° /
18°
2026-07-14
Patchy rain nearby
21° /
17°
2026-07-15
Sunny
23° /
16°
Additional Forecasts for Niterói
Air Quality
💨 US EPA Index 2 (Moderate)
CO (Carbon Monoxide) 274.0 μg/m³
O₃ (Ozone) 53.0 μg/m³
NO₂ (Nitrogen Dioxide) 62.2 μg/m³
SO₂ (Sulphur Dioxide) 13.1 μg/m³
PM2.5 (Fine particles) 38.0 μg/m³
PM10 (Coarse particles) 44.0 μg/m³
Historical Weather
Weather Forecasts for Other Cities in Brazil
Weather in Niterói — FAQ
Answers refreshed each request based on current conditions in Niterói.
What is the weather like right now in Niterói?
Right now in Niterói, Brazil the temperature is 20.1°C (feels like 20.1°C), with smoky haze. Relative humidity is 78% and wind is 7.2 km/h.
What is today's high and low temperature in Niterói?
Today's forecast high in Niterói is 21.9°C and the overnight low is 16.9°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Niterói today?
The chance of precipitation in Niterói today is 9%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Niterói differ from nearby cities?
Even short distances can change temperatures noticeably. Niterói's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.