Climate Overview
The climate in Rio Formoso is hot. The average annual temperature is 26°C and approximately 930mm of precipitation falls per year. June is the wettest month, receiving around 144mm of rainfall. Rio Formoso sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Rio Formoso has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is February, when average highs reach 31°C and the mean temperature sits around 27°C. August is the coolest month, with minimum temperatures around 21°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
Rio Formoso is a moderately rainy area, receiving approximately 930mm of precipitation annually, which averages out to around 77mm per month. The wettest month is June, averaging 144mm of rainfall. May and March also tend to see above-average precipitation. The driest month is October, with just 28mm. That's 117mm less than June, 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
Rio Formoso is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.
Seasons
87 days until Winter
It is currently autumn in Rio Formoso, which began on March 20, 2026. Rio Formoso sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in February at around 31°C, while the coldest stretch bottoms out in August near 21°C. Winter is next, beginning on June 21, 2026 — 87 days from now.
Spring
Temperatures range from 22 to 30°C. Rainfall is relatively light, with around 103mm over the season and a monthly average of 34mm. Winds are moderate at around 16km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 24 to 31°C. Precipitation is moderate at around 157mm for the season, averaging 52mm per month. Winds are moderate at around 15km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 31°C. Rainfall is heavy, totalling around 344mm across the season with a monthly average of 115mm. Winds are generally light, averaging 13km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 28°C. Rainfall is heavy, totalling around 326mm across the season with a monthly average of 109mm. Winds are moderate at around 15km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Rio Formoso is during August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 58mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 31°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Rio Formoso 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.
