Hamilton weather in October
October in Hamilton: warm, rainy, with clean air — a great time to visit.
#7 of 12 months in Hamilton · #317 of 604 destinations to visit in October · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Hamilton climate normals — October
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 26°C / 79°F | |
| Rainfall | 124 mm / 4.9 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 20°C / 69°F | |
| Sunshine | 8.8 h/day | |
| Daylight | 11.4 h | |
| Wind | 30 km/h / 19 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hamilton in October — FAQ
- Is October a good time to visit Hamilton?
- October in Hamilton: warm, rainy, with clean air — a great time to visit. It ranks #7 of 12 months for Hamilton on SeasonMap's comfort score (75/100).
- What is the weather like in Hamilton in October?
- In October, Hamilton averages a daily high of 25.2°C and a low of 23.9°C, with about 124 mm of rain over roughly 13.8 rainy days.
- What is the air quality in Hamilton in October?
- Hamilton has a mean US Air Quality Index of about 45 in October.