San Bruno Weather in April

April in San Bruno brings moderate temperatures, with highs of 18°C (64°F) and nights dropping to 9°C (48°F). Expect some rainfall, with around 46 mm (1.8 in) typical for the month.

Rainfall in San Bruno in April

Expect around 7 days of rain based on historical data, with 46 mm (1.8 in) average. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in San Bruno in April

In April, San Bruno sees moderate temperatures, with highs of 18°C (64°F). Nights drop to around 9°C (48°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. 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 San Bruno in April

There are approximately 310 hours of sunshine this month, resulting in mostly clear days.

Wind Speed in San Bruno 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

The water is 13°C (55°F) this month — cool enough to feel refreshing on a warm day, but cold enough that most people won't stay in for long without a wetsuit.

Should you favor a climate that's both dry and comfortably warm, May, June, July, August, September and October typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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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 San Bruno's climate page.

San Bruno Temperature in April

Min Temperature 9°C (48°F)  

Max Temperature 18°C (64°F)  

Water Temperature 13°C (55°F) *  

Chance of Rain 25%  

Precipitation 46 mm (1.8 in)  

Rainy days 7 days  

Humidity 72% *  

Windspeed 6 m/s (12 knots) *  

Sunshine 310 hours *  

Percentage Sunshine 78% *  

* Data from: San Francisco, the United States of America (2 KM, 1 Miles).

What to Wear in San Bruno in April

For San Bruno in April, 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. Rain is likely on several days, so bring a good rain jacket. 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 San Bruno in April

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

Cycling

6/10

Walking

6/10

Camping

5/10

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 San Bruno's climate page.

More climate data for San Bruno

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full San Bruno climate overview or explore weather in the United States of America.