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Weather extremes

How extreme does Niterói's weather get?

The hottest, coldest, wettest and snowiest days Niterói has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Santos Dumont station 7 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Niterói has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
106°F Nov 12, 2013

That is about 24°F hotter than a normal November afternoon in Niterói (typical high near 82°F).

The three most extreme on record

1 106°F Nov 12, 2013
2 104°F Dec 28, 2015
3 103°F Dec 29, 2015
❄️ Coldest night
50°F Jul 9, 1997

About 16°F colder than a normal July night in Niterói (typical low near 66°F).

The three most extreme on record

1 50°F Jul 9, 1997
2 51°F Aug 24, 1997
3 52°F Oct 10, 1996
🌧️ Most rain in one day
2.95 in Nov 8, 2015

The three most extreme on record

1 2.95 in Nov 8, 2015
2 2.68 in Jan 16, 2016
3 2.36 in Nov 5, 2015

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

30°50°70°90°110°130° all-time high 106°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Niterói's record heat sits well above even a hot day for the season — November's 106°F is about 24°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Niterói's warmest days reach the high 80s°F and its coldest nights drop to the mid-60s°F. But across the record it has gone as high as 106°F and as low as 50°F. A single day has delivered over 3 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Galeao Antonio Carlos Jobim, a weather station, about 17 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →