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Parnaíba Weather by Month
Average temperatures, rainfall and humidity for Parnaíba, Brazil, month by month, built from OpenWeather's historical records. Use it to see what a typical Parnaíba month looks like before you travel — then check the live Parnaíba forecast for the days ahead.
Warmest month
October
33°C average high
Coolest month
July
23°C average low
Wettest month
March
153 mm of rain
Driest month
September
3 mm of rain
Average temperature and rainfall in Parnaíba 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 | 32°C | 24°C | 21°C / 37°C | 64 mm | 78% | 18 km/h |
| February | 32°C | 24°C | 21°C / 35°C | 105 mm | 82% | 15 km/h |
| March | 32°C | 24°C | 22°C / 36°C | 153 mm | 84% | 13 km/h |
| April | 32°C | 24°C | 21°C / 35°C | 136 mm | 85% | 12 km/h |
| May | 32°C | 24°C | 21°C / 36°C | 66 mm | 83% | 12 km/h |
| June | 32°C | 24°C | 20°C / 35°C | 26 mm | 78% | 14 km/h |
| July | 33°C | 23°C | 19°C / 37°C | 23 mm | 74% | 16 km/h |
| August | 33°C | 24°C | 19°C / 38°C | 7 mm | 72% | 20 km/h |
| September | 33°C | 24°C | 22°C / 36°C | 3 mm | 70% | 24 km/h |
| October | 33°C | 25°C | 21°C / 38°C | 4 mm | 69% | 25 km/h |
| November | 33°C | 25°C | 22°C / 36°C | 15 mm | 71% | 24 km/h |
| December | 33°C | 25°C | 22°C / 37°C | 21 mm | 72% | 23 km/h |
Best time to visit Parnaíba
The most comfortable time to visit Parnaíba is generally June and August to September, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around March, totalling about 623 mm a year.
Travellers who prefer heat should aim for October, when highs average 33°C. March is the month to avoid if rain would spoil your plans — it averages 153 mm, roughly 53× the rainfall of September.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Parnaíba forecast for what is happening now.