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Petrolina, Brazil climate
BSh Hot semi-arid
Petrolina has a remarkably steady tropical climate (Hot semi-arid, Köppen BSh). The hottest month is November with an average daily high near 34°C, while the coldest is July averaging around 20°C at night. Precipitation totals about 419 mm a year and is strongly seasonal — March alone averages 84 mm while August barely receives 2 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Petrolina climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 33 | 33 | 33 | 32 | 30 | 30 | 31 | 33 | 34 | 34 | 34 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 27 | 25 | 25 | 25 | 27 | 29 | 29 | 29 |
| Avg low (°C) | 24 | 24 | 24 | 23 | 23 | 21 | 20 | 20 | 21 | 23 | 23 | 24 |
| Precipitation (mm) | 83 | 78 | 84 | 46 | 11 | 6 | 4 | 2 | 2 | 9 | 47 | 47 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 33 | 33 | 33 | 32 | 30 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 27 | 25 |
| Avg low (°C) | 24 | 24 | 24 | 23 | 23 | 21 |
| Precipitation (mm) | 83 | 78 | 84 | 46 | 11 | 6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 31 | 33 | 34 | 34 | 34 |
| Avg temp (°C) | 25 | 25 | 27 | 29 | 29 | 29 |
| Avg low (°C) | 20 | 20 | 21 | 23 | 23 | 24 |
| Precipitation (mm) | 4 | 2 | 2 | 9 | 47 | 47 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 63 | 63 | 59 | 52 | 44 | 41 | 34 | 31 | 37 | 51 | 55 |
| Relative humidity (%) | 60 | 64 | 64 | 64 | 62 | 63 | 61 | 57 | 51 | 49 | 52 | 55 |
| Wind speed (mph) | 7.0 | 6.8 | 6.6 | 7.5 | 8.8 | 10.0 | 10.7 | 11.4 | 11.5 | 10.6 | 8.8 | 7.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 63 | 63 | 59 | 52 | 44 |
| Relative humidity (%) | 60 | 64 | 64 | 64 | 62 | 63 |
| Wind speed (mph) | 7.0 | 6.8 | 6.6 | 7.5 | 8.8 | 10.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 41 | 34 | 31 | 37 | 51 | 55 |
| Relative humidity (%) | 61 | 57 | 51 | 49 | 52 | 55 |
| Wind speed (mph) | 10.7 | 11.4 | 11.5 | 10.6 | 8.8 | 7.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from INMET, Brazil's national meteorological institute, measured at Petrolina, about 3 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.