Climate averages 1991–2020

Cruzeiro do Sul weather
in September.

A hot, wet month: the warmest and the 4th driest of the year.

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

Average high 30.6°C Daytime mean, September

Average low 22.4°C Night-time mean, September

Rainfall 109 mm 17 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Cruzeiro do Sul: daytime highs average 30.6°C and nights cool to about 22.4°C. By daytime temperature it is the warmest month of the year.

Expect about 109 mm of rain on roughly 17 days, which makes September a wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 03 min on an average September day.

The nearest other city in this atlas is Pucallpa (223 km away). In September its highs average 30.7°C, about as warm as Cruzeiro do Sul, with 148 mm of rain.

Among the 448 cities listed in Brazil, Cruzeiro do Sul ranks joint 107th of 448 for the warmest September highs and joint 354th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Cruzeiro do Sul is 3.1°C warmer than that mean.

From September to October, average highs fall by 0.3°C to 30.3°C, and monthly rainfall rises from 109 mm to 176 mm.

The annual picture

September 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

Cruzeiro do Sul climate table

1991–2020

Monthly climate averages for Cruzeiro do Sul, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	29.6°C22.7°C	22.7°C	239	25.3	12.513 h
February	29.5°C22.7°C	22.7°C	244	23.8	12.412 h
March	29.4°C22.7°C	22.7°C	282	27.4	12.112 h
April	29.0°C22.5°C	22.5°C	221	24.4	11.912 h
May	28.3°C22.0°C	22.0°C	134	20.6	11.812 h
June	27.9°C21.4°C	21.4°C	81	15.3	11.712 h
July	28.5°C21.0°C	21.0°C	56	11.7	11.712 h
August	30.2°C21.6°C	21.6°C	71	12.9	11.912 h
September, selected	30.6°C22.4°C	22.4°C	109	17.0	12.112 h
October	30.3°C22.7°C	22.7°C	176	22.6	12.312 h
November	29.6°C22.7°C	22.7°C	221	23.7	12.512 h
December	29.4°C22.7°C	22.7°C	243	26.4	12.613 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

September in nearby cities

Distance from Cruzeiro do Sul

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 Cruzeiro do Sul) is explained once on the Cruzeiro do Sul year overview and on the Sources, method and limits page.