Imperatriz climate

Name: Imperatriz
Address: BR

Imperatriz is warmest in September, with average highs of 35 °C, and coldest in June, when nights average 23 °C. March is the wettest month (230 mm) and August the driest (2.6 mm). Figures are 1991–2020 climate normals.

Across a full year Imperatriz averages 1,235 mm of rain and 364 days above 25 °C.

Brazil · population 273,110 · 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 September 35 °C
Coldest month June 23 °C
Driest month August 3 mm
Wettest month March 230 mm
Least cloud August 25 % cloud
Hottest on record November 38 °C
Coldest on record July 19 °C

What to expectImperatriz through the year

Imperatriz has a clear annual cycle: average daily highs run from 32 °C in June to 35 °C in September, a swing of 3.7 °C in mean temperature across the year.

Counted across a normal year, 364 days a year reach 25 °C, 239 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in November.

Rain is strongly seasonal. March averages 230 mm against 3 mm in August — 87 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	29.2 °C	216 mm	83 %
February	29.1 °C	216 mm	84 %
March	29.1 °C	230 mm	84 %
April	29.4 °C	162 mm	78 %
May	30.2 °C	77 mm	62 %
June	32.0 °C	9 mm	38 %
July	33.2 °C	7 mm	29 %
August	34.3 °C	3 mm	25 %
September	34.5 °C	10 mm	33 %
October	33.5 °C	43 mm	51 %
November	31.6 °C	111 mm	71 %
December	30.3 °C	151 mm	76 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	29.2 °C	23.0 °C	25.7 °C	32.8 °C	20.0 °C	31	9
February	29.1 °C	23.0 °C	25.6 °C	33.7 °C	20.8 °C	28	7
March	29.1 °C	23.0 °C	25.6 °C	32.8 °C	21.0 °C	31	8
April	29.4 °C	23.1 °C	25.8 °C	33.1 °C	21.2 °C	30	9
May	30.2 °C	23.1 °C	26.3 °C	35.2 °C	19.8 °C	31	17
June	32.0 °C	22.9 °C	27.2 °C	35.4 °C	19.7 °C	30	27
July	33.2 °C	23.0 °C	27.8 °C	35.9 °C	19.3 °C	31	30
August	34.3 °C	23.6 °C	28.8 °C	37.3 °C	20.1 °C	31	31
September	34.5 °C	24.4 °C	29.3 °C	37.8 °C	21.1 °C	30	30
October	33.5 °C	24.7 °C	28.8 °C	37.3 °C	20.1 °C	31	30
November	31.6 °C	24.2 °C	27.5 °C	38.2 °C	21.5 °C	30	25
December	30.3 °C	23.6 °C	26.5 °C	36.5 °C	21.7 °C	31	18

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	216 mm	26	12 h/day	83 %	85 %	9.3 km/h
February	216 mm	24	12 h/day	84 %	86 %	9.6 km/h
March	230 mm	26	12 h/day	84 %	86 %	9.4 km/h
April	162 mm	21	12 h/day	78 %	85 %	9.5 km/h
May	77 mm	12	12 h/day	62 %	81 %	11 km/h
June	9 mm	2	12 h/day	38 %	67 %	15 km/h
July	7 mm	1	12 h/day	29 %	56 %	15 km/h
August	3 mm	1	12 h/day	25 %	51 %	15 km/h
September	10 mm	2	12 h/day	33 %	55 %	14 km/h
October	43 mm	6	12 h/day	51 %	64 %	12 km/h
November	111 mm	14	12 h/day	71 %	75 %	10 km/h
December	151 mm	20	12 h/day	76 %	81 %	9.6 km/h

How Imperatriz 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
Imperatriz	35 °C	23 °C	1,235 mm	364
Marabá · Brazil	34 °C	23 °C	1,706 mm	363
Araguaína · Brazil	34 °C	21 °C	1,725 mm	363
Parauapebas · Brazil	33 °C	22 °C	1,511 mm	363

Where Imperatriz ranks

Ranking	Position	Value
The warmest places in South America in November	15th of 50	32 °C
The warmest places in South America in July	20th of 50	33 °C
The warmest places in South America in October	20th of 50	33 °C
The warmest places in South America in September	21st of 50	35 °C
The warmest places in South America in August	22nd of 50	34 °C
The warmest places in South America in June	24th of 50	32 °C

Planning a trip? See the best time to visit Imperatriz.

QuestionsCommon questions about Imperatriz’s climate

When is the best time to visit Imperatriz?

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

How hot does Imperatriz get?

In September, the warmest month, daily highs average 35 °C. About 239 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 23 °C in June, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Imperatriz?

March, averaging 230 mm over 26 days with rain. The driest month is August with 3 mm. The year as a whole averages 1,235 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 Imperatriz 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: -5.526°, -47.492° (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.