Foster City Weather in August

August in Foster City brings high temperatures, with highs of 23°C (73°F) and nights dropping to 14°C (57°F). It's also the driest month of the year, ideal for those who want to avoid rain.

Rainfall in Foster City in August

This month is perfect for exploring, with the driest conditions of the year. Records from the past 30 years suggest around 0 days of rain, with 0 mm (0 in) average for the month.

Temperature in Foster City in August

August is a excellent month in Foster City, with 23°C (73°F) during the day and 14°C (57°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Foster City in August

The days are predominantly sunny, with an estimated total of around 288 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Foster City in August

Average wind conditions reach 6 m/s (12 knots) in August. This creates notably windy weather that is clearly felt and can influence daily activities. Keep in mind this is an average. Some days are less intense, while others can be quite gusty.

Average water temperature in August

The water temperature is 14°C (57°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.

If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Foster City's climate page.

Foster City Temperature in August

Min Temperature 14°C (57°F)  

Max Temperature 23°C (73°F)  

Water Temperature 14°C (57°F) *  

Chance of Rain 0%  

Precipitation 0 mm (0 in)  

Rainy days 0 days  

Humidity 75% *  

Windspeed 6 m/s (12 knots) *  

Sunshine 288 hours *  

Percentage Sunshine 68% *  

* Data from: San Francisco, the United States of America (11 KM, 7 Miles).

What to Wear in Foster City in August

For Foster City in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Expect water temperatures of around 14°C (57°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Foster City in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

10/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Foster City's climate page.

More climate data for Foster City

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Foster City climate overview or explore weather in the United States of America.