Fontana

What is the climate like in Fontana?

The best time to visit Fontana is typically April – November, with trip comfort peaking in July (9.3/10). Fontana is warmest in August, when daily highs average 94°F (34°C), and coolest in January, when lows fall to about 44°F (6°C). The wettest month is typically January and the driest is July; the year sees roughly 20 in (520 mm) of precipitation.

• Best time to visitApril – November — comfort peaks in July (9.3/10)
• Warmest monthAugust — average high 94°F (34°C)
• Coolest monthJanuary — average low 44°F (6°C)
• Wettest monthJanuary (4.1 in (104 mm))
• Driest monthJuly (0.0 in (1 mm))
• Annual precipitation20 in (520 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromNorton AFB, 17 km away (1949-2026)