San Mateo Weather in April
April in San Mateo typically sees daytime highs of 19°C (66°F) and nighttime lows of 9°C (48°F). Expect some rainfall during the month.
Rainfall in San Mateo in April
You can expect rain on around 7 days based on historical patterns, with 40 mm (1.6 in) average for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in San Mateo in April
April in San Mateo brings typical temperatures with highs around 19°C (66°F) and lows of 9°C (48°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in San Mateo in April
The city usually sees around 310 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in San Mateo in April
Wind speeds average 6 m/s (12 knots) during April. At this speed, expect strong winds that make large branches move and create some resistance when walking. Since this is an average, some days have fresh winds while others have strong breezes that can make umbrellas tricky to control.
Average water temperature in April
With water at 13°C (55°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.For San Mateo itself, May, June, July, August, September and October generally stand out with 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 San Mateo's climate page.
San Mateo 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
40 mm (1.6 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 →
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What to Wear in San Mateo 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. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 13°C (55°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in San Mateo 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 San Mateo's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full San Mateo climate overview or explore weather in the United States of America.
