Climate almanac
Ajax
Ontario, CA · 43.85°, -79.03°
What is the climate like in Ajax?
The best time to visit Ajax is typically July – September, with trip comfort peaking in September (7.2/10). Ajax is warmest in August, when daily highs average 74°F (23°C), and coolest in January, when lows fall to about 24°F (-4°C). The wettest month is typically April and the driest is September; the year sees roughly 40 in of precipitation.
- Best time to visitJuly – September — comfort peaks in September (7.2/10)
- Warmest monthAugust — average high 74°F (23°C)
- Coolest monthJanuary — average low 24°F (-4°C)
- Wettest monthApril (4.4 in)
- Driest monthSeptember (2.5 in)
- Annual precipitation40 in