Climate averages 1991–2020
Pinheiro weather
in September.
A hot, very dry month: the 4th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Pinheiro: daytime highs average 32.0°C and nights cool to about 24.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 14 mm of rain on roughly 4 days, which makes September a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 06 min on an average September day.
The nearest other city in this atlas is São Luís (87 km away). In September its highs average 31.2°C, 0.9°C cooler than Pinheiro, with 11 mm of rain.
Among the 448 cities listed in Brazil, Pinheiro ranks joint 69th of 448 for the warmest September highs and joint 56th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Pinheiro is 4.5°C warmer than that mean.
From September to October, average highs rise by 0.7°C to 32.7°C, and monthly rainfall rises from 14 mm to 16 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
Pinheiro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.4°C23.8°C | 23.8°C | 196 | 23.3 | 12.212 h |
| February | 29.4°C23.5°C | 23.5°C | 260 | 25.5 | 12.212 h |
| March | 29.1°C23.4°C | 23.4°C | 368 | 29.8 | 12.112 h |
| April | 29.2°C23.4°C | 23.4°C | 367 | 28.7 | 12.112 h |
| May | 29.5°C23.5°C | 23.5°C | 248 | 26.3 | 12.012 h |
| June | 29.6°C23.2°C | 23.2°C | 116 | 20.2 | 12.012 h |
| July | 29.7°C23.1°C | 23.1°C | 76 | 16.2 | 12.012 h |
| August | 30.8°C23.6°C | 23.6°C | 27 | 8.4 | 12.012 h |
| September, selected | 32.0°C24.2°C | 24.2°C | 14 | 3.6 | 12.112 h |
| October | 32.7°C24.6°C | 24.6°C | 16 | 3.6 | 12.212 h |
| November | 32.8°C24.6°C | 24.6°C | 27 | 5.5 | 12.212 h |
| December | 32.2°C24.6°C | 24.6°C | 66 | 12.1 | 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
- São Luís in SeptemberBrazil · 87 kmHigh 31.2°C · Low 25.5°C · 11 mm rain
- São José de Ribamar in SeptemberBrazil · 114 kmHigh 30.1°C · Low 25.8°C · 11 mm rain
- Santa Inês in SeptemberBrazil · 132 kmHigh 34.0°C · Low 24.3°C · 12 mm rain
- Bacabal in SeptemberBrazil · 193 kmHigh 34.9°C · Low 24.7°C · 7.4 mm rain
- Chapadinha in SeptemberBrazil · 234 kmHigh 34.9°C · Low 24.2°C · 3.5 mm rain
- Bragança in SeptemberBrazil · 248 kmHigh 30.6°C · Low 24.3°C · 20 mm rain
- Codó in SeptemberBrazil · 253 kmHigh 35.2°C · Low 24.2°C · 6.2 mm rain
- Paragominas in SeptemberBrazil · 258 kmHigh 34.1°C · Low 23.4°C · 13 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 Pinheiro) is explained once on the Pinheiro year overview and on the Sources, method and limits page.