Hamilton weather in January
January in Hamilton: nice, rainy, with clean air — a good time to visit.
#12 of 12 months in Hamilton · #387 of 604 destinations to visit in January · comfort 62/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Hamilton climate normals — January
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 18°C / 64°F | |
| Rainfall | 133 mm / 5.2 in | 🌧 rainy |
| Rainy days | 15 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 14°C / 57°F | |
| Sunshine | 7.1 h/day | |
| Daylight | 10.3 h | |
| Wind | 42 km/h / 26 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 January — FAQ
- Is January a good time to visit Hamilton?
- January in Hamilton: nice, rainy, with clean air — a good time to visit. It ranks #12 of 12 months for Hamilton on SeasonMap's comfort score (62/100).
- What is the weather like in Hamilton in January?
- In January, Hamilton averages a daily high of 20°C and a low of 17.9°C, with about 132.8 mm of rain over roughly 15.2 rainy days.
- What is the air quality in Hamilton in January?
- Hamilton has a mean US Air Quality Index of about 45 in January.