Climate Overview
The climate in Amarante do Maranhão is hot. The average annual temperature is 27°C and approximately 885mm of precipitation falls per year. March is the wettest month, receiving around 190mm of rainfall. Amarante do Maranhão sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Amarante do Maranhão sees moderate temperature variation throughout the year, ranging from 21°C to 35°C. The warmest month is September, when average highs reach 35°C and the mean temperature sits around 29°C. July is the coolest month, with minimum temperatures around 21°C and an average of 27°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs.
Precipitation
Amarante do Maranhão is a moderately rainy area, receiving approximately 885mm of precipitation annually, which averages out to around 74mm per month. The wettest month is March, averaging 190mm of rainfall. February and January also tend to see above-average precipitation. The driest month is August, with just 1mm. That's 189mm less than March, 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
Amarante do Maranhão is mildly breezy, with an average annual wind speed of 13km/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 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/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 17km/h in winter, 13km/h in spring, 11km/h in summer, 12km/h in autumn.
Seasons
89 days until Winter
It is currently autumn in Amarante do Maranhão, which began on March 20, 2026. Amarante do Maranhão sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in September at around 35°C, while the coldest stretch bottoms out in July near 21°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 23 to 35°C. Rainfall is relatively light, with around 102mm over the season and a monthly average of 34mm. Winds are generally light, averaging 13km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 23 to 32°C. Rainfall is heavy, totalling around 443mm across the season with a monthly average of 148mm. Winds are generally light, averaging 11km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 32°C. Rainfall is heavy, totalling around 331mm across the season with a monthly average of 110mm. Winds are generally light, averaging 12km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 34°C. Precipitation is minimal, with only around 9mm for the entire season. Winds are moderate at around 17km/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 Amarante do Maranhão 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.
