Georgetown weather in September
September in Georgetown: hot, rainy, with clean air — a great time to visit.
#4 of 12 months in Georgetown · #659 of 897 destinations to visit in September · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Georgetown in September
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Georgetown climate normals — September
| Daytime high | 30°C / 86°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Rainfall | 87 mm / 3.4 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 11 h/day | |
| Daylight | 12.2 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Georgetown in September — FAQ
- Is September a good time to visit Georgetown?
- September in Georgetown: hot, rainy, with clean air — a great time to visit. It ranks #4 of 12 months for Georgetown on SeasonMap's comfort score (70/100).
- What is the weather like in Georgetown in September?
- In September, Georgetown averages a daily high of 29.8°C and a low of 26°C, with about 86.8 mm of rain over roughly 17 rainy days.
- What is the air quality in Georgetown in September?
- Georgetown has a mean US Air Quality Index of about 42 in September.