San Mateo Weather in May
With daytime temperatures of 21°C (70°F) and nighttime lows of 11°C (52°F), May in San Mateo brings pleasant temperatures during the day. The excellent weather makes it an appealing time to visit.
Rainfall in San Mateo in May
On average, there are about 2 days with rain during this month, averaging 5.2 mm (0.2 in). The occasional light shower is possible, but rain is rarely an issue this month.
Temperature in San Mateo in May
The excellent temperature in San Mateo in May makes it a solid month to visit, with 21°C (70°F) during the day and 11°C (52°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in San Mateo in May
Expect a lot of sunshine this month, with about 324 hours of sun. These sunny conditions add to the overall experience.
Wind Speed in San Mateo in May
Wind speeds average 6 m/s (12 knots) during May. 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 May
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.If you favor pleasant temperatures and minimal rainfall, May is one of the best months to visit San Mateo.
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 May
Min Temperature
11°C (52°F)
Max Temperature
21°C (70°F)
Water Temperature
13°C (55°F) *
Chance of Rain
7%
Precipitation
5.2 mm (0.2 in)
Rainy days
2 days
Humidity
72% *
Windspeed
6 m/s (12 knots) *
Sunshine
324 hours *
Percentage Sunshine
73% *
Best Places in the United States of America in May
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 May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in San Mateo in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Dry conditions mean you won't need to worry about rain protection. 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 May
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.
