Climate averages 1991–2020
Picos weather
in September.
A very hot, very dry month: the 3rd warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a very hot month in Picos: daytime highs average 35.7°C and nights cool to about 24.2°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 1.7 mm of rain on fewer than one day, which makes September a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 04 min on an average September day.
The nearest other city in this atlas is Araripina (120 km away). In September its highs average 31.1°C, 4.6°C cooler than Picos, with 1.2 mm of rain.
Among the 448 cities listed in Brazil, Picos ranks 3rd of 448 for the warmest September highs and joint 15th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Picos is 8.2°C warmer than that mean.
From September to October, average highs rise by 0.9°C to 36.6°C, and monthly rainfall rises from 1.7 mm to 9.4 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
Picos climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 32.1°C24.2°C | 24.2°C | 141 | 16.6 | 12.512 h |
| February | 31.2°C23.5°C | 23.5°C | 141 | 17.1 | 12.312 h |
| March | 30.9°C23.3°C | 23.3°C | 149 | 18.9 | 12.112 h |
| April | 31.4°C23.4°C | 23.4°C | 88 | 11.6 | 12.012 h |
| May | 32.5°C23.8°C | 23.8°C | 30 | 4.8 | 11.812 h |
| June | 32.5°C23.1°C | 23.1°C | 3.9 | 1.0 | 11.712 h |
| July | 32.6°C22.4°C | 22.4°C | 2.2 | 0.5 | 11.812 h |
| August | 33.9°C22.6°C | 22.6°C | 0.7 | 0.1 | 11.912 h |
| September, selected | 35.7°C24.2°C | 24.2°C | 1.7 | 0.2 | 12.112 h |
| October | 36.6°C25.9°C | 25.9°C | 9.4 | 1.4 | 12.312 h |
| November | 35.8°C26.2°C | 26.2°C | 25 | 4.5 | 12.412 h |
| December | 34.5°C25.7°C | 25.7°C | 58 | 7.8 | 12.513 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
- Araripina in SeptemberBrazil · 120 kmHigh 31.1°C · Low 19.3°C · 1.2 mm rain
- Crato in SeptemberBrazil · 228 kmHigh 32.7°C · Low 21.0°C · 2.1 mm rain
- Crateús in SeptemberBrazil · 229 kmHigh 34.3°C · Low 22.5°C · 1.3 mm rain
- Juazeiro do Norte in SeptemberBrazil · 238 kmHigh 32.9°C · Low 21.0°C · 2.1 mm rain
- Casa Nova in SeptemberBrazil · 239 kmHigh 32.8°C · Low 21.2°C · 1.0 mm rain
- Iguatu in SeptemberBrazil · 252 kmHigh 34.5°C · Low 23.1°C · 1.8 mm rain
- Teresina in SeptemberBrazil · 266 kmHigh 36.5°C · Low 24.1°C · 3.3 mm rain
- Petrolina in SeptemberBrazil · 279 kmHigh 32.4°C · Low 20.3°C · 1.0 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 Picos) is explained once on the Picos year overview and on the Sources, method and limits page.