Climate averages 1991–2020

Santarém weather
in January.

A hot, very wet month: the 7th warmest and the 10th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 28.6°C Daytime mean, January

Average low 24.7°C Night-time mean, January

Rainfall 409 mm 28 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

January is a hot month in Santarém: daytime highs average 28.6°C and nights cool to about 24.7°C. By daytime temperature it is the 7th warmest of the 12 months.

Expect about 409 mm of rain on roughly 28 days, which makes January a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average January day.

The nearest other city in this atlas is Oriximiná (149 km away). In January its highs average 29.2°C, 0.6°C warmer than Santarém, with 329 mm of rain.

Among the 448 cities listed in Brazil, Santarém ranks joint 218th of 448 for the warmest January highs and 448th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Santarém is 0.1°C warmer than that mean.

From January to February, average highs fall by 0.3°C to 28.3°C, and monthly rainfall falls from 409 mm to 391 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Santarém climate table

1991–2020

Monthly climate averages for Santarém, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	28.6°C24.7°C	24.7°C	409	28.2	12.212 h
February	28.3°C24.5°C	24.5°C	391	26.1	12.212 h
March	28.3°C24.5°C	24.5°C	488	29.3	12.112 h
April	28.2°C24.5°C	24.5°C	450	29.2	12.112 h
May	28.3°C24.6°C	24.6°C	365	29.6	12.012 h
June	28.5°C24.8°C	24.8°C	187	24.8	12.012 h
July	28.9°C25.0°C	25.0°C	114	19.2	12.012 h
August	30.2°C25.7°C	25.7°C	74	13.0	12.012 h
September	31.2°C26.2°C	26.2°C	68	10.5	12.112 h
October	31.4°C26.5°C	26.5°C	107	11.9	12.212 h
November	30.7°C26.2°C	26.2°C	149	16.6	12.212 h
December	29.9°C25.7°C	25.7°C	233	21.7	12.312 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

January in nearby cities

Distance from Santarém

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Santarém) is explained once on the Santarém year overview and on the Sources, method and limits page.