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.