Climate Overview
The climate in Santa Isabel do Rio Negro is hot. The average annual temperature is 27°C and approximately 2813mm of precipitation falls per year. Santa Isabel do Rio Negro receives a notable amount of rainfall throughout the year, including during its driest month. Santa Isabel do Rio Negro sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Santa Isabel do Rio Negro has relatively stable temperatures year-round, staying within a 8°C range. The warmest month is September, when average highs reach 32°C and the mean temperature sits around 28°C. June is the coolest month, with minimum temperatures around 24°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
Santa Isabel do Rio Negro is a very wet location, receiving approximately 2813mm of precipitation annually, which averages out to around 234mm per month. The wettest month is May, averaging 393mm of rainfall. April and March also tend to see above-average precipitation. The driest month is September, with just 129mm. That's 264mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.
Wind
Santa Isabel do Rio Negro is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 7km/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 Santa Isabel do Rio Negro, which began on March 20, 2026. Santa Isabel do Rio Negro 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 32°C, while the coldest stretch bottoms out in June near 24°C. Winter is next, beginning on June 21, 2026 — 87 days from now.
Spring
Temperatures range from 25 to 32°C. Rainfall is heavy, totalling around 459mm across the season with a monthly average of 153mm. Winds are generally light, averaging 8km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 31°C. Rainfall is heavy, totalling around 659mm across the season with a monthly average of 220mm. Winds are generally light, averaging 9km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 30°C. Rainfall is heavy, totalling around 1030mm across the season with a monthly average of 343mm. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 24 to 31°C. Rainfall is heavy, totalling around 664mm across the season with a monthly average of 221mm. Winds are generally light, averaging 7km/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 Santa Isabel do Rio Negro 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.
