Climate Overview
The climate in São João do Piauí is hot. The average annual temperature is 29°C and approximately 549mm of precipitation falls per year. February is the wettest month, receiving around 119mm of rainfall. São João do Piauí sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
São João do Piauí sees moderate temperature variation throughout the year, ranging from 22°C to 37°C. October is the hottest month, with daytime highs reaching 37°C and an average of 31°C. July is the coolest month, with minimum temperatures around 22°C and an average of 28°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs.
Precipitation
São João do Piauí is a relatively dry area, receiving approximately 549mm of precipitation annually, which averages out to around 46mm per month. The wettest month is February, averaging 119mm of rainfall. March and January also tend to see above-average precipitation. The driest month is August, with just 0mm. That's 118mm less than February, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
São João do Piauí is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in March, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 9km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 21km/h in winter, 18km/h in spring, 13km/h in summer, 15km/h in autumn.
Seasons
87 days until Winter
It is currently autumn in São João do Piauí, which began on March 20, 2026. São João do Piauí sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in October at around 37°C, while the coldest stretch bottoms out in July near 22°C. Winter is next, beginning on June 21, 2026 — 87 days from now.
Spring
Temperatures range from 24 to 37°C. Rainfall is relatively light, with around 76mm over the season and a monthly average of 25mm. Winds are moderate at around 18km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 24 to 34°C. Precipitation is moderate at around 275mm for the season, averaging 92mm per month. Winds are generally light, averaging 13km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 33°C. Precipitation is moderate at around 196mm for the season, averaging 65mm per month. Winds are generally light, averaging 15km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 22 to 35°C. Precipitation is minimal, with only around 2mm for the entire season. Winds are moderate at around 21km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for São João do Piauí based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
