Hamilton weather in December
December in Hamilton: nice, rainy, with clean air — a good time to visit.
#10 of 12 months in Hamilton · #350 of 604 destinations to visit in December · comfort 67/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Hamilton climate normals — December
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 84 mm / 3.3 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 14°C / 57°F | |
| Sunshine | 7 h/day | |
| Daylight | 10.1 h | |
| Wind | 38 km/h / 23 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Hamilton in December — FAQ
- Is December a good time to visit Hamilton?
- December in Hamilton: nice, rainy, with clean air — a good time to visit. It ranks #10 of 12 months for Hamilton on SeasonMap's comfort score (67/100).
- What is the weather like in Hamilton in December?
- In December, Hamilton averages a daily high of 21°C and a low of 19.2°C, with about 84.1 mm of rain over roughly 11.2 rainy days.
- What is the air quality in Hamilton in December?
- Hamilton has a mean US Air Quality Index of about 44 in December.