Goiânia is warmest in September, averaging 36° by day and 20° at night. The wettest month is February with 235 mm, and the year brings about 1263 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 29° | 19° | 214 mm | 12.9 h | Rainy season |
| February | 28° | 19° | 235 mm | 12.6 h | Rainy season |
| March | 28° | 19° | 155 mm | 12.1 h | Mild |
| April | 29° | 18° | 69 mm | 11.6 h | Beach weather |
| May | 29° | 16° | 6 mm | 11.2 h | Beach weather |
| June | 29° | 15° | 3 mm | 11.0 h | Beach weather |
| July | 31° | 15° | 0 mm | 11.1 h | Beach weather |
| August | 33° | 17° | 3 mm | 11.4 h | Beach weather |
| September | 36° | 20° | 30 mm | 11.9 h | Very hot |
| October | 33° | 21° | 152 mm | 12.4 h | Mild |
| November | 31° | 20° | 210 mm | 12.8 h | Rainy season |
| December | 29° | 20° | 186 mm | 13.0 h | Rainy season |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: April, May, June, July and August — highs around 30°, nights no colder than 15°, and at most 69 mm of rain in a month.
Wet season: January, February, November and December — up to 235 mm in a single month.
Serious heat: In September the average high reaches 36°.