Foster City Weather in April
April in Foster City sees daytime temperatures around 19°C (66°F) and lows of 9°C (48°F) at night. Pack a rain jacket because some rainfall is likely.
Rainfall in Foster City in April
Expect around 7 days of rain based on historical data, with 38 mm (1.5 in) average. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Foster City in April
April in Foster City sees highs of 19°C (66°F) and lows of 9°C (48°F) overnight. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 9°C (48°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Foster City in April
Expect sunny days throughout the month, with an estimated 310 hours of sunshine. This makes it a pleasant time to visit Foster City.
Wind Speed in Foster City in April
Average wind conditions reach 6 m/s (12 knots) in April. 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 April
At 13°C (55°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.If you prefer enjoying temperate temperatures and rain-free days, May, June, July, August, September and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
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 April
Min Temperature
9°C (48°F)
Max Temperature
19°C (66°F)
Water Temperature
13°C (55°F) *
Chance of Rain
23%
Precipitation
38 mm (1.5 in)
Rainy days
7 days
Humidity
72% *
Windspeed
6 m/s (12 knots) *
Sunshine
310 hours *
Percentage Sunshine
78% *
Best Places in the United States of America in April
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in April →
perfect weather
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unpleasant
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What to Wear in Foster City in April
Pleasant temperatures in April mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers. Expect water temperatures of around 13°C (55°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Foster City in April
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
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.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Foster City climate overview or explore weather in the United States of America.
