Hamilton weather in August
August in Hamilton: hot, rainy, with clean air — one of the best months to visit.
#1 of 12 months in Hamilton · #216 of 604 destinations to visit in August · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Hamilton climate normals — August
| Daytime high | 28°C / 82°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 80°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 91 mm / 3.6 in | 🌧 rainy |
| Rainy days | 16 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 24°C / 74°F | |
| Sunshine | 11.7 h/day | |
| Daylight | 13.3 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hamilton in August — FAQ
- Is August a good time to visit Hamilton?
- August in Hamilton: hot, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Hamilton on SeasonMap's comfort score (84/100).
- What is the weather like in Hamilton in August?
- In August, Hamilton averages a daily high of 27.8°C and a low of 26.4°C, with about 91.2 mm of rain over roughly 15.6 rainy days.
- What is the air quality in Hamilton in August?
- Hamilton has a mean US Air Quality Index of about 37 in August.