Georgetown weather by month
Georgetown runs from about 27°C in June to 28°C in September, with June the wettest month at 371 mm.
warmest month
September
28°C
coolest month
June
27°C
wettest month
June
371 mm
worst air month
February
16 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 27°C | 115 mm | 347 h | 8 |
| February | 27°C | 54 mm | 339 h | 16 |
| March | 28°C | 60 mm | 365 h | 10 |
| April | 28°C | 122 mm | 326 h | 11 |
| May | 27°C | 314 mm | 292 h | 10 |
| June | 27°C | 371 mm | 282 h | 7 |
| July | 27°C | 331 mm | 330 h | 5 |
| August | 28°C | 161 mm | 358 h | 7 |
| September | 28°C | 106 mm | 347 h | 9 |
| October | 28°C | 143 mm | 347 h | 8 |
| November | 28°C | 112 mm | 324 h | 7 |
| December | 27°C | 171 mm | 341 h | 8 |
About 3,998 hours of sun a year. Roughly 194 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.