October Weather in Foster City

Last updated: March 2, 2024

The weather in Foster City, United States, during October is characterized by an average temperature of 17°C (63°F). Highs can soar to 30°C (87°F), while lows may dip to 8°C (48°F). Typically, the humidity level in Foster City throughout October hovers around 62%.

8°C (48°F)

Minimum temperature

17°C (63°F)

Average temperature

30°C (87°F)

Maximum temperature

62%

Humidity

Precipitation and Sunshine hours

In October, Foster City averages 24 mm (0.9 inches) of rainfall, typically over the course of 1 rainy days. The month enjoys an average of 11 hours 10 minutes of daylight, with the sun shining for approximately 8 hours 53 minutes each day. Additionally, there is a 53% probability of sunny days during this period.

24 mm (0.9 inches)

Precipitation

1 rainy days

Rainy days

8 hours 53 minutes

Sunshine hours

53%

Chance of sun

UV Index

In October, the UV Index in Foster City reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 25 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 0 1 2 3 5 6 6 6 4 3 1 1 0
Exposure Low Moderate High Moderate Low
Time to burn 45 min 30 min 25 min 30 min 45 min

Compare Foster City's Climate with Cities Worldwide