San Bruno Weather in March

March in San Bruno brings moderate temperatures, with highs of 17°C (63°F) and nights dropping to 9°C (48°F). Rainfall is on the higher side this month, averaging around 87 mm (3.4 in), so keep a rain jacket handy.

Rainfall in San Bruno in March

You can expect rain on roughly 12 days based on historical data, averaging 87 mm (3.4 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in San Bruno in March

March in San Bruno sees highs of 17°C (63°F) and lows of 9°C (48°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights fall to 9°C (48°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in San Bruno in March

The days are predominantly sunny, with an estimated total of around 270 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in San Bruno in March

Average wind conditions reach 5 m/s (10 knots) in March. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in March

At 12°C (54°F), the water is too cold for most people to swim comfortably. A wetsuit is pretty much essential if you plan to go in.

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.

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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 March

Min Temperature 9°C (48°F)  

Max Temperature 17°C (63°F)  

Water Temperature 12°C (54°F) *  

Chance of Rain 40%  

Precipitation 87 mm (3.4 in)  

Rainy days 12 days  

Humidity 75% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 270 hours *  

Percentage Sunshine 73% *  

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

What to Wear in San Bruno in March

For San Bruno in March, 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. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 12°C (54°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 San Bruno in March

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

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

9/10

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.