Nova Iguaçu climate

Name: Nova Iguaçu
Address: BR

Nova Iguaçu is warmest in February, with average highs of 32 °C, and coldest in July, when nights average 16 °C. January is the wettest month (231 mm) and August the driest (34 mm). Figures are 1991–2020 climate normals.

Across a full year Nova Iguaçu averages 1,386 mm of rain and 277 days above 25 °C.

Brazil · population 843,046 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month February 32 °C
Coldest month July 16 °C
Driest month August 34 mm
Wettest month January 231 mm
Least cloud August 45 % cloud
Hottest on record October 40 °C
Coldest on record June 8.7 °C

What to expectNova Iguaçu through the year

Nova Iguaçu has a clear annual cycle: average daily highs run from 25 °C in July to 32 °C in February, a swing of 6.6 °C in mean temperature across the year.

Counted across a normal year, 277 days a year reach 25 °C, 127 of them reach 30 °C. The warmest reading in the 1991–2020 record is 40 °C, in October.

Rain is strongly seasonal. January averages 231 mm against 34 mm in August — 6.9 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	31.0 °C	231 mm	72 %
February	31.5 °C	175 mm	64 %
March	29.9 °C	184 mm	65 %
April	28.3 °C	90 mm	55 %
May	26.0 °C	63 mm	54 %
June	25.6 °C	36 mm	48 %
July	25.4 °C	35 mm	46 %
August	26.5 °C	34 mm	45 %
September	27.5 °C	69 mm	58 %
October	28.5 °C	97 mm	68 %
November	28.5 °C	175 mm	74 %
December	30.1 °C	197 mm	72 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	31.0 °C	23.1 °C	26.5 °C	39.4 °C	18.0 °C	29	20
February	31.5 °C	23.1 °C	26.8 °C	38.3 °C	18.7 °C	28	20
March	29.9 °C	22.5 °C	25.7 °C	37.1 °C	16.7 °C	30	15
April	28.3 °C	20.8 °C	24.1 °C	35.5 °C	12.4 °C	25	9
May	26.0 °C	18.1 °C	21.6 °C	33.4 °C	11.6 °C	18	3
June	25.6 °C	16.7 °C	20.6 °C	33.0 °C	8.7 °C	17	2
July	25.4 °C	16.0 °C	20.1 °C	33.8 °C	9.1 °C	18	2
August	26.5 °C	16.5 °C	20.8 °C	35.8 °C	10.3 °C	19	7
September	27.5 °C	18.1 °C	22.2 °C	38.8 °C	11.3 °C	20	10
October	28.5 °C	19.8 °C	23.5 °C	39.7 °C	13.0 °C	23	12
November	28.5 °C	20.8 °C	24.1 °C	38.8 °C	14.0 °C	23	11
December	30.1 °C	22.2 °C	25.7 °C	38.2 °C	15.8 °C	28	16

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	231 mm	20	13 h/day	72 %	80 %	11 km/h
February	175 mm	16	13 h/day	64 %	79 %	11 km/h
March	184 mm	19	12 h/day	65 %	82 %	10 km/h
April	90 mm	12	12 h/day	55 %	81 %	10 km/h
May	63 mm	10	11 h/day	54 %	81 %	9.9 km/h
June	36 mm	6	11 h/day	48 %	81 %	9.9 km/h
July	35 mm	6	11 h/day	46 %	79 %	11 km/h
August	34 mm	7	11 h/day	45 %	76 %	12 km/h
September	69 mm	10	12 h/day	58 %	76 %	13 km/h
October	97 mm	13	13 h/day	68 %	77 %	13 km/h
November	175 mm	18	13 h/day	74 %	79 %	12 km/h
December	197 mm	19	14 h/day	72 %	80 %	12 km/h

How Nova Iguaçu compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Nova Iguaçu	32 °C	16 °C	1,386 mm	277
São João de Meriti · Brazil	32 °C	16 °C	1,633 mm	279
Duque de Caxias · Brazil	31 °C	16 °C	1,613 mm	271
Barra da Tijuca · Brazil	31 °C	17 °C	1,091 mm	277
Rio de Janeiro · Brazil	31 °C	17 °C	1,601 mm	265
Niterói · Brazil	31 °C	17 °C	1,550 mm	268
Petrópolis · Brazil	27 °C	13 °C	1,966 mm	154

Where Nova Iguaçu ranks

Ranking	Position	Value
The warmest places in South America in February	25th of 50	32 °C
The warmest places in South America in January	33rd of 50	31 °C

Planning a trip? See the best time to visit Nova Iguaçu.

QuestionsCommon questions about Nova Iguaçu’s climate

When is the best time to visit Nova Iguaçu?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, February is the warmest month and August the driest. The month-by-month table above has the full picture.

How hot does Nova Iguaçu get?

In February, the warmest month, daily highs average 32 °C. About 127 days a year pass 30 °C. The highest value in the 1991–2020 record is 40 °C.

How cold does it get in winter?

Nights average 16 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Nova Iguaçu?

January, averaging 231 mm over 20 days with rain. The driest month is August with 34 mm. The year as a whole averages 1,386 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Nova Iguaçu rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: -22.759°, -43.451° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.