Climate almanac
Hamilton
Ontario, CA · 43.25°, -79.85°
What is the climate like in Hamilton?
The best time to visit Hamilton is typically June – September, with trip comfort peaking in September (7.3/10). Hamilton is warmest in July, when daily highs average 80°F (26°C), and coolest in January, when lows fall to about 23°F (-5°C). The wettest month is typically April and the driest is September; the year sees roughly 38 in of precipitation.
- Best time to visitJune – September — comfort peaks in September (7.3/10)
- Warmest monthJuly — average high 80°F (26°C)
- Coolest monthJanuary — average low 23°F (-5°C)
- Wettest monthApril (4.0 in)
- Driest monthSeptember (2.3 in)
- Annual precipitation38 in