Climate averages 1991–2020
Petrolina weather
in October.
A very hot, very dry month: the warmest and the joint 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a very hot month in Petrolina: daytime highs average 34.0°C and nights cool to about 21.8°C. By daytime temperature it is the warmest month of the year.
Expect about 10 mm of rain on roughly 2 days, which makes October a very dry month (the joint 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average October day.
The nearest other city in this atlas is Casa Nova (58 km away). In October its highs average 34.2°C, about as warm as Petrolina, with 9.5 mm of rain.
Among the 448 cities listed in Brazil, Petrolina ranks joint 24th of 448 for the warmest October highs and joint 28th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Petrolina is 5.7°C warmer than that mean.
From October to November, average highs fall by 0.2°C to 33.8°C, and monthly rainfall rises from 10 mm to 32 mm.
The annual picture
October 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
Petrolina climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 32.6°C23.0°C | 23.0°C | 80 | 8.7 | 12.613 h |
| February | 32.3°C22.9°C | 22.9°C | 67 | 9.5 | 12.412 h |
| March | 32.1°C22.9°C | 22.9°C | 79 | 10.1 | 12.212 h |
| April | 31.9°C22.6°C | 22.6°C | 32 | 6.0 | 11.912 h |
| May | 31.0°C21.8°C | 21.8°C | 10 | 2.0 | 11.712 h |
| June | 29.5°C20.6°C | 20.6°C | 3.4 | 0.7 | 11.612 h |
| July | 29.0°C19.6°C | 19.6°C | 2.8 | 0.4 | 11.612 h |
| August | 30.1°C19.4°C | 19.4°C | 1.2 | 0.2 | 11.812 h |
| September | 32.4°C20.3°C | 20.3°C | 1.0 | 0.1 | 12.012 h |
| October, selected | 34.0°C21.8°C | 21.8°C | 10 | 1.5 | 12.312 h |
| November | 33.8°C22.8°C | 22.8°C | 32 | 3.9 | 12.513 h |
| December | 33.4°C23.2°C | 23.2°C | 50 | 6.2 | 12.713 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
October in nearby cities
- Casa Nova in OctoberBrazil · 58 kmHigh 34.2°C · Low 22.8°C · 9.5 mm rain
- Senhor do Bonfim in OctoberBrazil · 123 kmHigh 29.4°C · Low 19.0°C · 30 mm rain
- Campo Formoso in OctoberBrazil · 125 kmHigh 29.3°C · Low 19.1°C · 30 mm rain
- Jacobina in OctoberBrazil · 198 kmHigh 29.5°C · Low 19.7°C · 32 mm rain
- Araripina in OctoberBrazil · 203 kmHigh 32.5°C · Low 21.2°C · 11 mm rain
- Paulo Afonso in OctoberBrazil · 251 kmHigh 32.7°C · Low 21.1°C · 11 mm rain
- Irecê in OctoberBrazil · 259 kmHigh 31.6°C · Low 19.8°C · 21 mm rain
- Crato in OctoberBrazil · 269 kmHigh 33.8°C · Low 22.4°C · 9.3 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 Petrolina) is explained once on the Petrolina year overview and on the Sources, method and limits page.