Climate averages 1991–2020
Chapadinha weather
in September.
A very hot, very dry month: the joint 2nd 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 Chapadinha: daytime highs average 34.9°C and nights cool to about 24.2°C. By daytime temperature it is the joint 2nd warmest of the 12 months.
Expect about 3.5 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 Codó (98 km away). In September its highs average 35.2°C, about as warm as Chapadinha, with 6.2 mm of rain.
Among the 448 cities listed in Brazil, Chapadinha ranks joint 10th of 448 for the warmest September highs and 27th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Chapadinha is 7.4°C warmer than that mean.
From September to October, average highs rise by 0.6°C to 35.5°C, and monthly rainfall rises from 3.5 mm to 12 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
Chapadinha climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.0°C23.5°C | 23.5°C | 198 | 21.4 | 12.312 h |
| February | 30.0°C23.1°C | 23.1°C | 253 | 23.0 | 12.212 h |
| March | 29.7°C22.9°C | 22.9°C | 300 | 27.5 | 12.112 h |
| April | 29.5°C22.9°C | 22.9°C | 312 | 26.1 | 12.012 h |
| May | 29.9°C23.0°C | 23.0°C | 175 | 18.8 | 11.912 h |
| June | 30.6°C22.9°C | 22.9°C | 42 | 8.2 | 11.912 h |
| July | 31.8°C23.0°C | 23.0°C | 23 | 3.9 | 11.912 h |
| August | 33.6°C23.6°C | 23.6°C | 3.8 | 0.7 | 12.012 h |
| September, selected | 34.9°C24.2°C | 24.2°C | 3.5 | 0.7 | 12.112 h |
| October | 35.5°C24.6°C | 24.6°C | 12 | 1.4 | 12.212 h |
| November | 34.9°C24.9°C | 24.9°C | 29 | 4.0 | 12.312 h |
| December | 33.8°C24.7°C | 24.7°C | 63 | 9.3 | 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
September in nearby cities
- Codó in SeptemberBrazil · 98 kmHigh 35.2°C · Low 24.2°C · 6.2 mm rain
- Caxias in SeptemberBrazil · 124 kmHigh 36.1°C · Low 23.9°C · 5.0 mm rain
- São José de Ribamar in SeptemberBrazil · 153 kmHigh 30.1°C · Low 25.8°C · 11 mm rain
- Teresina in SeptemberBrazil · 162 kmHigh 36.5°C · Low 24.1°C · 3.3 mm rain
- Bacabal in SeptemberBrazil · 167 kmHigh 34.9°C · Low 24.7°C · 7.4 mm rain
- São Luís in SeptemberBrazil · 171 kmHigh 31.2°C · Low 25.5°C · 11 mm rain
- Parnaíba in SeptemberBrazil · 199 kmHigh 33.8°C · Low 25.0°C · 1.1 mm rain
- Santa Inês in SeptemberBrazil · 224 kmHigh 34.0°C · Low 24.3°C · 12 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 Chapadinha) is explained once on the Chapadinha year overview and on the Sources, method and limits page.