Climate averages 1991–2020
Russas weather
in September.
A very hot, very dry month: one of the warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a very hot month in Russas: daytime highs average 35.2°C and nights cool to about 23.1°C. By daytime temperature it is one of the warmest months of the year.
Expect about 1.2 mm of rain on fewer than one day, which makes September a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 05 min on an average September day.
The nearest other city in this atlas is Mossoró (75 km away). In September its highs average 34.9°C, about as warm as Russas, with almost no rain (under 1 mm).
Among the 448 cities listed in Brazil, Russas ranks joint 7th of 448 for the warmest September highs and joint 9th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Russas is 7.6°C warmer than that mean.
From September to October, average highs stay level at 35.2°C, and monthly rainfall rises from 1.2 mm to 2.6 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
Russas climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 33.2°C24.2°C | 24.2°C | 74 | 11.7 | 12.412 h |
| February | 32.4°C24.0°C | 24.0°C | 95 | 14.1 | 12.312 h |
| March | 31.6°C23.9°C | 23.9°C | 161 | 19.2 | 12.112 h |
| April | 31.2°C23.8°C | 23.8°C | 152 | 17.6 | 12.012 h |
| May | 31.9°C23.8°C | 23.8°C | 71 | 10.4 | 11.912 h |
| June | 32.1°C23.3°C | 23.3°C | 29 | 6.4 | 11.812 h |
| July | 32.7°C22.9°C | 22.9°C | 18 | 3.0 | 11.912 h |
| August | 34.3°C22.7°C | 22.7°C | 3.0 | 0.6 | 12.012 h |
| September, selected | 35.2°C23.1°C | 23.1°C | 1.2 | 0.2 | 12.112 h |
| October | 35.2°C23.6°C | 23.6°C | 2.6 | 0.3 | 12.212 h |
| November | 34.9°C24.0°C | 24.0°C | 2.9 | 0.4 | 12.312 h |
| December | 34.3°C24.3°C | 24.3°C | 16 | 3.4 | 12.412 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
- Mossoró in SeptemberBrazil · 75 kmHigh 34.9°C · Low 23.1°C · 0.9 mm rain
- Cascavel, Brazil in SeptemberBrazil · 94 kmHigh 30.2°C · Low 24.2°C · 2.5 mm rain
- Pacajus in SeptemberBrazil · 101 kmHigh 32.9°C · Low 23.3°C · 2.6 mm rain
- Horizonte in SeptemberBrazil · 109 kmHigh 32.4°C · Low 23.3°C · 3.7 mm rain
- Quixadá in SeptemberBrazil · 115 kmHigh 34.4°C · Low 23.1°C · 1.3 mm rain
- Pacatuba in SeptemberBrazil · 128 kmHigh 32.5°C · Low 23.7°C · 3.7 mm rain
- Eusébio in SeptemberBrazil · 128 kmHigh 31.2°C · Low 24.1°C · 3.7 mm rain
- Maracanaú in SeptemberBrazil · 138 kmHigh 31.9°C · Low 24.0°C · 2.6 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 Russas) is explained once on the Russas year overview and on the Sources, method and limits page.