Climate Overview
The climate in Guaíba is temperate. The average annual temperature is 11°C and approximately 393mm of precipitation falls per year. Guaíba receives a notable amount of rainfall throughout the year, including during its driest month. Guaíba is in the Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: April, March, January. The coldest months are December, November, July, when temperatures can drop to 7°C.
Temperature
Guaíba has relatively stable temperatures year-round, staying within a 8°C range. April is the warmest month, though highs remain moderate at 15°C with a mean of 13°C. December is the coolest month, with minimum temperatures around 7°C and an average of 9°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.
Precipitation
Guaíba is a quite dry location, receiving approximately 393mm of precipitation annually, which averages out to around 33mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is January, with just 33mm. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Guaíba is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 7km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.
Seasons
16 days until Spring
It is currently winter in Guaíba, which began on June 21, 2026. Guaíba is in the Southern Hemisphere, where the seasons are reversed: spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in April at around 15°C, while the coldest stretch bottoms out in December near 7°C. Spring is next, beginning on September 23, 2026 (16 days from now).
Spring
Temperatures range from 9 to 13°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Winds are generally light, averaging 12km/h. Light layers work well as temperatures warm through the season. It is a great time to be outdoors.
Summer
Temperatures range from 7 to 15°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Winds are generally light, averaging 8km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 11 to 15°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Winds are generally light, averaging 9km/h. Layered clothing works best as temperatures gradually cool. Enjoy the crisp air and changing scenery.
Winter
Temperatures range from 9 to 12°C. Rainfall is relatively light, with around 98mm over the season and a monthly average of 33mm. Winds are generally light, averaging 8km/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 Guaíba 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.
