Climate almanac
Perth
Ontario, CA · 44.90°, -76.25°
What is the climate like in Perth?
Perth is warmest in July, when daily highs average 80°F (27°C), and coolest in January, when lows fall to about 12°F (-11°C). The wettest month is typically April and the driest is September; the year sees roughly 41 in of precipitation.
- Warmest monthJuly — average high 80°F (27°C)
- Coolest monthJanuary — average low 12°F (-11°C)
- Wettest monthApril (4.2 in)
- Driest monthSeptember (2.1 in)
- Annual precipitation41 in