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.