Santarém climate

Name: Santarém
Address: BR

Santarém is warmest in October, with average highs of 31 °C, and coldest in March, when nights average 24 °C. March is the wettest month (499 mm) and September the driest (68 mm). Figures are 1991–2020 climate normals.

Across a full year Santarém averages 3,098 mm of rain and 365 days above 25 °C.

Brazil · population 360,871 · 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 October 31 °C
Coldest month March 24 °C
Driest month September 68 mm
Wettest month March 499 mm
Least cloud August 43 % cloud
Hottest on record October 35 °C
Coldest on record January 23 °C

What to expectSantarém through the year

Santarém changes little through the year. Average daily highs stay between 28 and 31 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 365 days a year reach 25 °C, 124 of them reach 30 °C. The warmest reading in the 1991–2020 record is 35 °C, in October.

Rain is strongly seasonal. March averages 499 mm against 68 mm in September — 7.4 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	28.7 °C	413 mm	82 %
February	28.4 °C	400 mm	86 %
March	28.3 °C	499 mm	88 %
April	28.3 °C	463 mm	88 %
May	28.4 °C	375 mm	80 %
June	28.6 °C	191 mm	60 %
July	28.9 °C	121 mm	49 %
August	30.2 °C	73 mm	43 %
September	31.2 °C	68 mm	47 %
October	31.4 °C	107 mm	59 %
November	30.7 °C	156 mm	71 %
December	29.9 °C	233 mm	74 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.7 °C	24.7 °C	26.5 °C	33.2 °C	22.6 °C	31	5
February	28.4 °C	24.4 °C	26.2 °C	32.5 °C	22.6 °C	28	3
March	28.3 °C	24.4 °C	26.2 °C	32.0 °C	22.8 °C	31	2
April	28.3 °C	24.4 °C	26.1 °C	31.3 °C	22.9 °C	30	1
May	28.4 °C	24.5 °C	26.3 °C	32.1 °C	23.0 °C	31	1
June	28.6 °C	24.7 °C	26.5 °C	31.2 °C	22.6 °C	30	1
July	28.9 °C	24.9 °C	26.8 °C	33.0 °C	22.7 °C	31	4
August	30.2 °C	25.7 °C	27.8 °C	33.1 °C	22.8 °C	31	17
September	31.2 °C	26.2 °C	28.6 °C	33.5 °C	23.0 °C	30	26
October	31.4 °C	26.4 °C	28.7 °C	34.9 °C	23.1 °C	31	26
November	30.7 °C	26.2 °C	28.3 °C	34.3 °C	23.3 °C	30	22
December	29.9 °C	25.6 °C	27.6 °C	33.3 °C	22.8 °C	31	15

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	413 mm	27	12 h/day	82 %	83 %	13 km/h
February	400 mm	26	12 h/day	86 %	84 %	14 km/h
March	499 mm	29	12 h/day	88 %	85 %	14 km/h
April	463 mm	29	12 h/day	88 %	86 %	13 km/h
May	375 mm	30	12 h/day	80 %	86 %	13 km/h
June	191 mm	25	12 h/day	60 %	84 %	13 km/h
July	121 mm	19	12 h/day	49 %	81 %	13 km/h
August	73 mm	12	12 h/day	43 %	77 %	14 km/h
September	68 mm	10	12 h/day	47 %	73 %	15 km/h
October	107 mm	11	12 h/day	59 %	72 %	15 km/h
November	156 mm	16	12 h/day	71 %	75 %	14 km/h
December	233 mm	21	12 h/day	74 %	78 %	14 km/h

Where Santarém ranks

Ranking	Position	Value
The warmest places in South America in November	35thof 50	31 °C
The warmest places in South America in October	44thof 50	31 °C

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

QuestionsCommon questions about Santarém’s climate

When is the best time to visit Santarém?

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

How hot does Santarém get?

In October, the warmest month, daily highs average 31 °C. About 124 days a year pass 30 °C. The highest value in the 1991–2020 record is 35 °C.

How cold does it get in winter?

Nights average 24 °C in March, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Santarém?

March, averaging 499 mm over 29 days with rain. The driest month is September with 68 mm. The year as a whole averages 3,098 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 Santarém 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
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.