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Barreiras Weather by Month
Average temperatures, rainfall and humidity for Barreiras, Brazil, month by month, built from OpenWeather’s historical records. Use it to see what a typical Barreiras month looks like before you travel — then check the live Barreiras forecast for the days ahead.
Warmest month
September
36°C average high
Coolest month
July
17°C average low
Wettest month
March
147 mm of rain
Driest month
July
2 mm of rain
Average temperature and rainfall in Barreiras by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 30°C | 20°C | 15°C / 40°C | 123 mm | 76% | 6 km/h |
| February | 30°C | 20°C | 17°C / 36°C | 80 mm | 76% | 6 km/h |
| March | 31°C | 20°C | 16°C / 41°C | 147 mm | 74% | 5 km/h |
| April | 31°C | 20°C | 15°C / 38°C | 110 mm | 70% | 6 km/h |
| May | 32°C | 19°C | 12°C / 38°C | 33 mm | 59% | 7 km/h |
| June | 32°C | 17°C | 12°C / 38°C | 3 mm | 53% | 8 km/h |
| July | 32°C | 17°C | 11°C / 39°C | 2 mm | 49% | 8 km/h |
| August | 34°C | 18°C | 11°C / 41°C | 3 mm | 43% | 9 km/h |
| September | 36°C | 19°C | 13°C / 46°C | 3 mm | 39% | 9 km/h |
| October | 36°C | 21°C | 15°C / 43°C | 32 mm | 45% | 9 km/h |
| November | 31°C | 21°C | 17°C / 42°C | 119 mm | 70% | 7 km/h |
| December | 31°C | 20°C | 17°C / 40°C | 119 mm | 72% | 6 km/h |
Best time to visit Barreiras
The most comfortable time to visit Barreiras is generally May to July, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around March, totalling about 773 mm a year.
Travellers who prefer heat should aim for September, when highs average 36°C. March is the month to avoid if rain would spoil your plans — it averages 147 mm, roughly 76× the rainfall of the driest month (July).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Barreiras forecast for what is happening now.
Weather across Brazil right now
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