Climate almanac
Grand River South
Ontario, CA · 43.45°, -80.40°
What is the climate like in Grand River South?
The best time to visit Grand River South is typically June – September, with trip comfort peaking in September (7.0/10). Grand River South is warmest in July, when daily highs average 79°F (26°C), and coolest in January, when lows fall to about 17°F (-8°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 (7.0/10)
- Warmest monthJuly — average high 79°F (26°C)
- Coolest monthJanuary — average low 17°F (-8°C)
- Wettest monthApril (3.8 in)
- Driest monthSeptember (2.4 in)
- Annual precipitation38 in