Foster City

What is the climate like in Foster City?

The best time to visit Foster City is typically April – October, with trip comfort peaking in August (8.7/10). Foster City is warmest in September, when daily highs average 76°F (24°C), and coolest in December, when lows fall to about 47°F (8°C). The wettest month is typically January and the driest is July; the year sees roughly 21 in of precipitation.

• Best time to visitApril – October — comfort peaks in August (8.7/10)
• Warmest monthSeptember — average high 76°F (24°C)
• Coolest monthDecember — average low 47°F (8°C)
• Wettest monthJanuary (4.5 in)
• Driest monthJuly (0.0 in)
• Annual precipitation21 in