Goiania weather by month
Goiania runs from about 23°C in June to 28°C in September, with November the wettest month at 205 mm.
warmest month
September
28°C
coolest month
June
23°C
wettest month
November
205 mm
worst air month
March
8 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 24°C | 201 mm | 340 h | 7 |
| February | 24°C | 138 mm | 281 h | 6 |
| March | 25°C | 119 mm | 301 h | 8 |
| April | 24°C | 68 mm | 325 h | 6 |
| May | 23°C | 0 mm | 338 h | 5 |
| June | 23°C | 0 mm | 321 h | 5 |
| July | 23°C | 0 mm | 338 h | 5 |
| August | 24°C | 0 mm | 343 h | 5 |
| September | 28°C | 10 mm | 346 h | 8 |
| October | 26°C | 130 mm | 305 h | 7 |
| November | 23°C | 205 mm | 270 h | 7 |
| December | 25°C | 122 mm | 318 h | 7 |
About 3,826 hours of sun a year. Roughly 100 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.