Climate averages 1991–2020

Patos weather
in September.

A very hot, very dry month: the 5th warmest and the driest of the year.

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

Average high 34.0°C Daytime mean, September
Average low 21.1°C Night-time mean, September
Rainfall <1 mm Almost no rain
Daylight 12 h Sunrise to sunset, per day
Every month in Patos · average highYear overview

September is a very hot month in Patos: daytime highs average 34.0°C and nights cool to about 21.1°C. By daytime temperature it is the 5th warmest of the 12 months.

Rain is very rare: less than 1 mm falls in a typical September (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 04 min on an average September day.

The nearest other city in this atlas is Serra Talhada (155 km away). In September its highs average 32.4°C, 1.6°C cooler than Patos, with 1.1 mm of rain.

Among the 448 cities listed in Brazil, Patos ranks joint 27th of 448 for the warmest September highs and 1st of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Patos is 6.5°C warmer than that mean.

From September to October, average highs rise by 1.1°C to 35.1°C, and monthly rainfall rises from under 1 mm to 3.1 mm.

The annual picture

September in context

30-year average
Average highAverage low°C
Average daily high and low temperatures by month The same values are available in the monthly table below. Lines show mean daily maxima and minima, not a forecast interval. 152025303540 JanFebMarAprMayJunJulAugSepOctNovDec

Monthly rainfall

Average total · mm
Average monthly rainfall totalsEach bar is a mean monthly total over 1991–2020. Full numbers are in the table. JanFebMarAprMayJunJulAugSepOctNovDec 1500

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

Every month, side by side

Patos climate table

1991–2020
Monthly climate averages for Patos, 1991–2020
MonthAverage highHigh / lowAverage lowRainfall mm/monthRain days ≥1 mm/dayDaylight hours/dayDay­light h/day
January 34.3°C23.4°C23.4°C647.112.512 h
February 33.8°C23.2°C23.2°C658.312.312 h
March 33.3°C23.2°C23.2°C11111.712.112 h
April 32.8°C23.0°C23.0°C698.812.012 h
May 32.5°C22.6°C22.6°C335.311.812 h
June 31.5°C21.6°C21.6°C132.311.712 h
July 31.3°C20.8°C20.8°C6.41.311.812 h
August 32.4°C20.6°C20.6°C3.90.311.912 h
September, selected 34.0°C21.1°C21.1°C0.60.112.112 h
October 35.1°C21.9°C21.9°C3.10.412.312 h
November 35.5°C22.6°C22.6°C2.30.412.412 h
December 35.2°C23.1°C23.1°C131.812.513 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 Patos

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 Patos) is explained once on the Patos year overview and on the Sources, method and limits page.