Climate Overview
The climate in Santa Helena de Goiás is hot. The average annual temperature is 25°C and approximately 1180mm of precipitation falls per year. January is the wettest month, receiving around 314mm of rainfall. Santa Helena de Goiás 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: September, October, April. The coldest months are June, July, August, when temperatures can drop to 16°C.
Temperature
Santa Helena de Goiás sees moderate temperature variation throughout the year, ranging from 16°C to 34°C. The warmest month is September, when average highs reach 34°C and the mean temperature sits around 27°C. June is the coolest month, with minimum temperatures around 16°C and an average of 22°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 3°C shift in average temperatures.
Precipitation
Santa Helena de Goiás is a moderately rainy area, receiving approximately 1180mm of precipitation annually, which averages out to around 98mm per month. The wettest month is January, averaging 314mm of rainfall. November and December also tend to see above-average precipitation. The driest month is July, with just 0mm. That's 314mm less than January, 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
Santa Helena de Goiás is relatively calm, with an average annual wind speed of 2km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
63 days until Spring
It is currently winter in Santa Helena de Goiás, which began on June 21, 2026. Santa Helena de Goiás 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 September at around 34°C, while the coldest stretch bottoms out in June near 16°C. Spring is next, beginning on September 23, 2026 — 63 days from now.
Spring
Temperatures range from 20 to 34°C. Rainfall is heavy, totalling around 373mm across the season with a monthly average of 124mm. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 22 to 31°C. Rainfall is heavy, totalling around 620mm across the season with a monthly average of 207mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 19 to 33°C. Precipitation is moderate at around 159mm for the season, averaging 53mm per month. Winds are generally light, averaging 2km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 16 to 32°C. Precipitation is minimal, with only around 28mm for the entire season. Winds are generally light, averaging 2km/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 Santa Helena de Goiás is during May, June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 9mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 34°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Santa Helena de Goiás 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.