Climate averages 1991–2020
Duque de Caxias weather
in September.
A warm, moderately wet month: the 8th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Duque de Caxias: daytime highs average 27.1°C and nights cool to about 18.2°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 86 mm of rain on roughly 11 days, which makes September a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 57 min on an average September day.
The nearest other city in this atlas is Belford Roxo (9 km away). In September its highs average 27.3°C, about as warm as Duque de Caxias, with 66 mm of rain.
Among the 448 cities listed in Brazil, Duque de Caxias ranks joint 240th of 448 for the warmest September highs and joint 312th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Duque de Caxias is 0.4°C cooler than that mean.
From September to October, average highs rise by 1.1°C to 28.2°C, and monthly rainfall rises from 86 mm to 121 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Duque de Caxias climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.9°C23.2°C | 23.2°C | 265 | 21.2 | 13.413 h |
| February | 31.4°C23.3°C | 23.3°C | 200 | 17.9 | 12.913 h |
| March | 29.7°C22.6°C | 22.6°C | 216 | 21.0 | 12.212 h |
| April | 28.1°C21.0°C | 21.0°C | 106 | 13.5 | 11.612 h |
| May | 25.8°C18.3°C | 18.3°C | 74 | 11.0 | 11.011 h |
| June | 25.4°C16.9°C | 16.9°C | 47 | 7.2 | 10.811 h |
| July | 25.1°C16.1°C | 16.1°C | 47 | 7.4 | 10.911 h |
| August | 26.1°C16.7°C | 16.7°C | 44 | 7.5 | 11.311 h |
| September, selected | 27.1°C18.2°C | 18.2°C | 86 | 11.0 | 11.912 h |
| October | 28.2°C19.8°C | 19.8°C | 121 | 14.3 | 12.613 h |
| November | 28.1°C20.8°C | 20.8°C | 213 | 19.0 | 13.213 h |
| December | 29.8°C22.3°C | 22.3°C | 237 | 21.1 | 13.514 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
- Belford Roxo in SeptemberBrazil · 9 kmHigh 27.3°C · Low 18.3°C · 66 mm rain
- Nova Iguaçu in SeptemberBrazil · 15 kmHigh 27.4°C · Low 18.1°C · 66 mm rain
- Rio de Janeiro in SeptemberBrazil · 19 kmHigh 26.8°C · Low 18.6°C · 75 mm rain
- Barra da Tijuca in SeptemberBrazil · 24 kmHigh 27.5°C · Low 19.0°C · 75 mm rain
- Queimados in SeptemberBrazil · 26 kmHigh 27.2°C · Low 17.8°C · 66 mm rain
- São Gonçalo in SeptemberBrazil · 27 kmHigh 26.3°C · Low 18.1°C · 85 mm rain
- Magé in SeptemberBrazil · 31 kmHigh 26.3°C · Low 17.6°C · 85 mm rain
- Petrópolis in SeptemberBrazil · 34 kmHigh 23.8°C · Low 15.1°C · 88 mm rain
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 limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Duque de Caxias) is explained once on the Duque de Caxias year overview and on the Sources, method and limits page.