Current Conditions

San Mateo, California

67°F20°C
Partly Cloudy

Wind

WSW 3 mph4 km/h

Humidity

71%

Cloud Cover

87%

As of Tuesday, September 8, 2026 at 10:34 PM PDT

Today's Outlook

Night

Mostly cloudy, with a low around 66°F19°C. Light wind from the WNW around 3 mph6 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Partly CloudyHigh 86°F30°CLow 66°F19°CPrecip 0 in0 mmCloud 68%Wind NW 4 mph7 km/hWednesday: Mostly cloudy and warm, with a high of 86°F30°C and morning low of 67°F20°C. Breezy from the NNW at 5 to 8 mph8 to 13 km/h. Wednesday Night: Mostly cloudy, with a low around 66°F19°C. Light wind from the WNW around 3 mph6 km/h.
ClearHigh 79°F26°CLow 65°F18°CPrecip 0 in0 mmCloud 25%Wind W 6 mph9 km/hThursday: Partly cloudy and warm, with a high of 79°F26°C and morning low of 67°F20°C. Breezy from the W at 6 to 9 mph10 to 14 km/h. Thursday Night: Mostly clear, with a low around 65°F18°C. Light wind from the W around 5 mph8 km/h.
ClearHigh 71°F21°CLow 61°F16°CPrecip 0 in0 mmCloud 35%Wind W 7 mph11 km/hFriday: Partly cloudy and warm, with a high of 71°F21°C and morning low of 62°F17°C. Breezy from the W at 8 to 9 mph12 to 14 km/h. Friday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h.
ClearHigh 69°F20°CLow 59°F15°CPrecip 0 in0 mmCloud 21%Wind W 9 mph14 km/hSaturday: Mostly clear and warm, with a high of 69°F20°C and morning low of 61°F16°C. Breezy from the W at 10 to 12 mph16 to 19 km/h. Saturday Night: Mostly clear, with a low around 59°F15°C. Breezy from the W at 8 to 10 mph13 to 17 km/h.
ClearHigh 71°F22°CLow 58°F14°CPrecip 0 in0 mmCloud 11%Wind WNW 9 mph14 km/hSunday: Mostly clear and warm, with a high of 71°F22°C and morning low of 61°F16°C. Breezy from the WNW at 9 to 12 mph15 to 19 km/h. Sunday Night: Mostly clear, with a low around 58°F14°C. Breezy from the WNW at 8 to 9 mph12 to 15 km/h.
ClearHigh 72°F22°CLow 57°F14°CPrecip 0 in0 mmCloud 23%Wind W 6 mph10 km/hMonday: Mostly clear and warm, with a high of 72°F22°C and morning low of 59°F15°C. Breezy from the WNW at 7 to 10 mph11 to 16 km/h. Monday Night: Mostly clear, with a low around 57°F14°C. Breezy from the W at 5 to 7 mph9 to 11 km/h.
Partly CloudyHigh 69°F20°CLow 58°F14°CPrecip 0 in0 mmCloud 52%Wind WSW 6 mph10 km/hTuesday: Partly cloudy and warm, with a high of 69°F20°C and morning low of 60°F16°C. Breezy from the WSW at 7 to 9 mph11 to 14 km/h. Tuesday Night: Mostly cloudy, with a low around 58°F14°C. Breezy from the WSW at 6 to 7 mph9 to 11 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 986°F30°C66°F19°C0 in0 mm· —68%Partly CloudyNW 4 mph7 km/h
ThursdaySep 1079°F26°C65°F18°C0 in0 mm· —25%ClearW 6 mph9 km/h
FridaySep 1171°F21°C61°F16°C0 in0 mm· —35%ClearW 7 mph11 km/h
SaturdaySep 1269°F20°C59°F15°C0 in0 mm· —21%ClearW 9 mph14 km/h
SundaySep 1371°F22°C58°F14°C0 in0 mm· —11%ClearWNW 9 mph14 km/h
MondaySep 1472°F22°C57°F14°C0 in0 mm· —23%ClearW 6 mph10 km/h
TuesdaySep 1569°F20°C58°F14°C0 in0 mm· —52%Partly CloudyWSW 6 mph10 km/h
WednesdaySep 1668°F20°C59°F15°C0 in0 mm· —44%Partly CloudyWSW 6 mph10 km/h
ThursdaySep 1770°F21°C58°F14°C0 in0 mm· —31%ClearW 5 mph8 km/h
FridaySep 1871°F21°C58°F14°C0 in0.1 mm· 2%34%ClearW 5 mph9 km/h
SaturdaySep 1970°F21°C58°F15°C0 in0 mm· —43%Partly CloudyW 6 mph10 km/h
SundaySep 2070°F21°C58°F15°C0 in0.1 mm· 3%41%Partly CloudyW 6 mph10 km/h
MondaySep 2170°F21°C58°F15°C0 in0 mm· —44%Partly CloudyW 6 mph10 km/h
TuesdaySep 2271°F22°C59°F15°C0 in0.1 mm· 2%43%Partly CloudyW 6 mph9 km/h
WednesdaySep 2372°F22°C59°F15°C0 in0.1 mm· 3%41%Partly CloudyW 6 mph9 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 37.5630°N, 122.3255°W·Elevation: 13m·Timezone: America/Los_Angeles·Population: 103,536