Observed 3:30 AM PDT at KSFO
San Mateo, CA weather
Mostly cloudy and 57°14°.
Today: low 55°13° (likely 53°12° to 58°14°), high 69°21° (likely 65°18° to 69°21°).
Now 57°14°
Mostly cloudy
- Wind
- Calm
- Up to 10 mph16 km/h through 4 PM
- Dew point
- 54°12°
- Comfortable
- UV index
- 0Low
- Moderate 12–4 PM · peak 4
- Air quality
- 33Good
- Main pollutant: PM2.5 (fine particles)
- Pressure
- 29.99 inHg1016 hPa
- Rising slowly · +0.02 inHg+0.8 hPa in 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
TonightNear 56°13° · Partly cloudy
This morningUp to 62°17° by 11 AM · Mostly cloudy
This afternoonUp to 68°20° by 3 PM · Partly cloudy
TonightDown to 52°11° by 5 AM · Clear
Tomorrow morningUp to 63°17° by 11 AM · Clear
Tomorrow afternoonUp to 72°22° by 4 PM · Clear
Tomorrow nightDown to 52°11° by 2 AM · Clear
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Fri 4a | Clear | 56°13° (likely 54°12° to 59°15°) | 56°13° | 0% | 2 mph3 km/h from WSW, gusts 5 mph9 km/h | 91% | 33% | 0 |
| Fri 5a | Partly cloudy | 55°13° (likely 53°12° to 59°15°) | 55°13° | 0% | 2 mph3 km/h from WSW, gusts 5 mph7 km/h | 91% | 52% | 0 |
| Fri 6a | Partly cloudy | 55°13° (likely 53°12° to 58°14°) | 55°13° | 0% | 1 mph2 km/h from WSW, gusts 3 mph5 km/h | 93% | 61% | 0 |
| Fri 7a | Partly sunny | 55°13° (likely 53°12° to 58°14°) | 55°13° | 0% | 1 mph2 km/h from WSW, gusts 3 mph5 km/h | 93% | 58% | 0 |
| Fri 8a | Mostly sunny | 55°13° (likely 53°12° to 58°14°) | 55°13° | 0% | 2 mph3 km/h from SE, gusts 4 mph6 km/h | 94% | 50% | 0 |
| Fri 9a | Mostly cloudy | 58°14° (likely 57°14° to 59°15°) | 58°14° | 0% | 3 mph5 km/h from N, gusts 3 mph4 km/h | 91% | 60% | 0 |
| Fri 10a | Mostly cloudy | 60°16° (likely 59°15° to 60°16°) | 60°16° | 0% | 5 mph8 km/h from N, gusts 6 mph10 km/h | 89% | 61% | 1 |
| Fri 11a | Cloudy | 62°17° (likely 60°16° to 62°17°) | 62°17° | 0% | 7 mph11 km/h from N, gusts 8 mph14 km/h | 86% | 92% | 1 |
| Fri 12p | Partly sunny | 64°18° (likely 61°16° to 64°18°) | 64°18° | 0% | 8 mph13 km/h from N, gusts 11 mph17 km/h | 84% | 78% | 3 |
| Fri 1p | Partly sunny | 66°19° (likely 63°17° to 66°19°) | 66°19° | 0% | 8 mph13 km/h from NNW, gusts 11 mph18 km/h | 78% | 69% | 4 |
| Fri 2p | Mostly sunny | 67°19° (likely 64°18° to 67°19°) | 67°19° | 0% | 9 mph14 km/h from NNW, gusts 11 mph18 km/h | 72% | 31% | 4 |
| Fri 3p | Mostly sunny | 68°20° (likely 64°18° to 68°20°) | 68°20° | 0% | 9 mph14 km/h from NNW, gusts 11 mph17 km/h | 68% | 18% | 3 |
| Fri 4p | Sunny | 68°20° (likely 65°18° to 68°20°) | 68°20° | 0% | 10 mph16 km/h from NW, gusts 11 mph18 km/h | 66% | 9% | 2 |
| Fri 5p | Sunny | 67°19° (likely 64°18° to 68°20°) | 67°19° | 0% | 12 mph19 km/h from WNW, gusts 12 mph19 km/h | 65% | 9% | 2 |
| Fri 6p | Clear | 65°18° (likely 62°17° to 65°18°) | 65°18° | 0% | 10 mph16 km/h from WNW, gusts 13 mph22 km/h | 71% | 0% | 1 |
| Fri 7p | Clear | 61°16° (likely 60°16° to 62°17°) | 61°16° | 0% | 9 mph14 km/h from WNW, gusts 13 mph21 km/h | 76% | 0% | 0 |
| Fri 8p | Clear | 60°16° (likely 58°14° to 61°16°) | 60°16° | 0% | 8 mph13 km/h from WNW, gusts 11 mph18 km/h | 77% | 0% | 0 |
| Fri 9p | Clear | 59°15° (likely 57°14° to 60°16°) | 59°15° | 0% | 6 mph10 km/h from WNW, gusts 11 mph17 km/h | 78% | 0% | 0 |
| Fri 10p | Clear | 58°14° (likely 56°13° to 59°15°) | 58°14° | 0% | 5 mph8 km/h from WNW, gusts 10 mph16 km/h | 77% | 0% | 0 |
| Fri 11p | Clear | 57°14° (likely 55°13° to 59°15°) | 57°14° | 0% | 5 mph8 km/h from W, gusts 6 mph10 km/h | 78% | 0% | 0 |
| Sat 12a | Clear | 56°13° (likely 54°12° to 58°14°) | 56°13° | 0% | 3 mph5 km/h from W, gusts 6 mph10 km/h | 78% | 0% | 0 |
| Sat 1a | Clear | 56°13° (likely 53°12° to 57°14°) | 56°13° | 0% | 2 mph3 km/h from WNW, gusts 5 mph8 km/h | 79% | 0% | 0 |
| Sat 2a | Clear | 54°12° (likely 52°11° to 57°14°) | 54°12° | 0% | 2 mph3 km/h from WNW, gusts 4 mph6 km/h | 80% | 0% | 0 |
| Sat 3a | Clear | 53°12° (likely 50°10° to 57°14°) | 53°12° | 0% | 2 mph3 km/h from WNW, gusts 5 mph8 km/h | 79% | 1% | 0 |
| Sat 4a | Clear | 53°12° (likely 50°10° to 57°14°) | 53°12° | 0% | 2 mph3 km/h from N, gusts 4 mph6 km/h | 80% | 1% | 0 |
| Sat 5a | Clear | 52°11° (likely 50°10° to 57°14°) | 52°11° | 0% | 2 mph3 km/h from ESE, gusts 3 mph5 km/h | 75% | 2% | 0 |
| Sat 6a | Clear | 52°11° (likely 50°10° to 57°14°) | 52°11° | 0% | 2 mph3 km/h from ESE, gusts 3 mph5 km/h | 76% | 2% | 0 |
| Sat 7a | Sunny | 52°11° (likely 50°10° to 56°13°) | 52°11° | 0% | 2 mph3 km/h from ESE, gusts 3 mph4 km/h | 74% | 1% | 0 |
| Sat 8a | Sunny | 52°11° (likely 50°10° to 56°13°) | 52°11° | 0% | 3 mph5 km/h from E, gusts 2 mph4 km/h | 73% | 1% | 0 |
| Sat 9a | Sunny | 57°14° (likely 54°12° to 58°14°) | 57°14° | 0% | 3 mph5 km/h from E, gusts 4 mph7 km/h | 66% | 1% | 1 |
| Sat 10a | Sunny | 60°16° (likely 58°14° to 62°17°) | 60°16° | 0% | 3 mph5 km/h from E, gusts 7 mph11 km/h | 59% | 0% | 2 |
| Sat 11a | Sunny | 63°17° (likely 61°16° to 67°19°) | 63°17° | 0% | 6 mph10 km/h from NNE, gusts 5 mph8 km/h | 50% | 0% | 3 |
| Sat 12p | Sunny | 65°18° (likely 64°18° to 69°21°) | 65°18° | 0% | 6 mph10 km/h from NNE, gusts 4 mph7 km/h | 47% | 0% | 4 |
| Sat 1p | Sunny | 68°20° (likely 65°18° to 70°21°) | 69°21° | 0% | 6 mph10 km/h from NNE, gusts 4 mph7 km/h | 42% | 1% | 5 |
| Sat 2p | Sunny | 70°21° (likely 66°19° to 71°22°) | 70°21° | 0% | 6 mph10 km/h from NW, gusts 5 mph9 km/h | 40% | 1% | 5 |
| Sat 3p | Sunny | 71°22° (likely 67°19° to 72°22°) | 71°22° | 0% | 6 mph10 km/h from NW, gusts 6 mph10 km/h | 40% | 4% | 4 |
| Sat 4p | Sunny | 72°22° (likely 67°19° to 72°22°) | 72°22° | 0% | 6 mph10 km/h from NW, gusts 7 mph12 km/h | 40% | 40% | 3 |
| Sat 5p | Sunny | 71°22° (likely 67°19° to 71°22°) | 71°22° | 0% | 7 mph11 km/h from NW, gusts 9 mph15 km/h | 41% | 40% | 2 |
| Sat 6p | Clear | 68°20° (likely 64°18° to 68°20°) | 68°20° | 0% | 7 mph11 km/h from NW, gusts 11 mph17 km/h | 51% | 10% | 1 |
| Sat 7p | Clear | 63°17° (likely 61°16° to 63°17°) | 63°17° | 0% | 7 mph11 km/h from NW, gusts 6 mph10 km/h | 61% | 0% | 0 |
| Sat 8p | Clear | 59°15° (likely 58°14° to 62°17°) | 59°15° | 0% | 3 mph5 km/h from WNW, gusts 4 mph7 km/h | 69% | 0% | 0 |
| Sat 9p | Clear | 57°14° (likely 56°13° to 60°16°) | 57°14° | 0% | 3 mph5 km/h from WNW, gusts 4 mph7 km/h | 74% | 31% | 0 |
| Sat 10p | Clear | 56°13° (likely 55°13° to 59°15°) | 56°13° | 0% | 3 mph5 km/h from WNW, gusts 3 mph6 km/h | 76% | 30% | 0 |
| Sat 11p | Clear | 56°13° (likely 54°12° to 59°15°) | 56°13° | 0% | 1 mph2 km/h from W, gusts 4 mph6 km/h | 77% | 16% | 0 |
| Sun 12a | Clear | 54°12° (likely 52°11° to 62°17°) | 54°12° | 0% | 1 mph2 km/h from W, gusts 5 mph7 km/h | 78% | 2% | 0 |
| Sun 1a | Clear | 53°12° (likely 51°11° to 61°16°) | 53°12° | 0% | 1 mph2 km/h from W, gusts 4 mph7 km/h | 80% | 2% | 0 |
| Sun 2a | Mostly clear | 52°11° (likely 50°10° to 61°16°) | 52°11° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 80% | 9% | 0 |
| Sun 3a | Clear | 52°11° (likely 49°9° to 60°16°) | 52°11° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 80% | 2% | 0 |
Days ahead
Today, Oct 23. Cloudy. High 69°21°, low 55°13°. Typical 71°22° / 52°11°. Dry. Mostly agree.
Morning
6 AM–noon
Mostly cloudy, 55°13°Dry
Afternoon
noon–6 PM
Mostly sunny, 68°20°Dry
Evening
6 PM–midnight
Clear, 60°16°Dry
Overnight
midnight–6 AM
Clear, 52°11°Dry
Official NWS forecast
Today: Patchy fog between 8am and 9am. Mostly sunny. High near 69, with temperatures falling to around 67 in the afternoon. Northwest wind 1 to 12 mph.
Tonight: Mostly cloudy, with a low around 55. West southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 65°18°–69°21°
- Low, likely
- 53°12°–58°14°
- Typical high / low
- 71°22° / 52°11°
- Wind
- 9 mph15 km/h, gusts 19 mph31 km/h
- UV peak
- 5
Tomorrow, Oct 24. Mostly sunny. High 72°22°, low 50°10°. Typical 71°22° / 52°11°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 52°11°Dry
Afternoon
noon–6 PM
Sunny, 72°22°Dry
Evening
6 PM–midnight
Clear, 59°15°Dry
Overnight
midnight–6 AM
Clear, 52°11°Dry
Official NWS forecast
Day: Sunny, with a high near 72. North northeast wind 2 to 7 mph.
Night: Mostly clear, with a low around 50. West northwest wind 1 to 7 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 67°19°–72°22°
- Low, likely
- 49°9°–56°13°
- Typical high / low
- 71°22° / 52°11°
- Wind
- 8 mph13 km/h
- UV peak
- 5
Sunday, Oct 25. Mostly sunny. High 72°22°, low 52°11°. Typical 71°22° / 52°11°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 53°12°Dry
Afternoon
noon–6 PM
Cloudy, 70°21°Dry
Evening
6 PM–midnight
Cloudy, 59°15°Dry
Overnight
midnight–6 AM
Clear, 54°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 72.
Night: Mostly clear, with a low around 52.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 66°19°–73°23°
- Low, likely
- 49°9°–57°14°
- Typical high / low
- 71°22° / 52°11°
- Wind
- 7 mph12 km/h, gusts 13 mph22 km/h
- UV peak
- 5
Monday, Oct 26. Partly sunny. High 69°21°, low 51°11°. Typical 70°21° / 52°11°. Dry. Forecasts differ.
Morning
6 AM–noon
Cloudy, 54°12°Dry
Afternoon
noon–6 PM
Sunny, 67°20°Dry
Evening
6 PM–midnight
Clear, 59°15°Dry
Overnight
midnight–6 AM
Clear, 54°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Mostly clear, with a low around 51.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 64°18°–69°21°
- Low, likely
- 51°11°–58°14°
- Typical high / low
- 70°21° / 52°11°
- Wind
- 11 mph18 km/h, gusts 21 mph34 km/h
- UV peak
- 5
Tuesday, Oct 27. Partly sunny. High 69°21°, low 51°11°. Typical 70°21° / 52°11°. Dry. Mostly agree.
Morning
6 AM–noon
Mostly sunny, 53°12°Dry
Afternoon
noon–6 PM
Sunny, 65°19°Dry
Evening
6 PM–midnight
Clear, 59°15°Dry
Overnight
midnight–6 AM
Cloudy, 53°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Partly cloudy, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 63°17°–69°21°
- Low, likely
- 50°10°–56°13°
- Typical high / low
- 70°21° / 52°11°
- Wind
- 9 mph14 km/h, gusts 18 mph28 km/h
- UV peak
- 5
Wednesday, Oct 28. Partly sunny. High 69°21°, low 52°11°. Typical 70°21° / 52°11°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 52°11°Dry
Afternoon
noon–6 PM
Cloudy, 66°19°Dry
Evening
6 PM–midnight
Partly cloudy, 59°15°Dry
Overnight
midnight–6 AM
Cloudy, 55°13°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Partly cloudy, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 63°17°–69°21°
- Low, likely
- 50°10°–55°13°
- Typical high / low
- 70°21° / 52°11°
- Wind
- 9 mph14 km/h
- UV peak
- 4
Thursday, Oct 29. Cloudy. High 68°20°, low 54°12°. Typical 70°21° / 52°11°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 55°13°Dry
Afternoon
noon–6 PM
Cloudy, 65°18°Dry
Evening
6 PM–midnight
Cloudy, 60°15°Dry
Overnight
midnight–6 AM
Cloudy, 55°13°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 68.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 62°17°–68°20°
- Low, likely
- 53°12°–56°13°
- Typical high / low
- 70°21° / 52°11°
- Wind
- 7 mph11 km/h, gusts 13 mph20 km/h
- UV peak
- 4
Friday, Oct 30. Sunny. High 66°19°, low 54°12°. Typical 69°21° / 51°11°. Rain 0.1 in2.5 mm, 20% chance. Forecasts differ.
Morning
6 AM–noon
Sunny, 55°13°Dry
Afternoon
noon–6 PM
Sunny, 67°20°Dry
Evening
6 PM–midnight
Clear, 60°16°20% chance · 0.05 in1.4 mm
Overnight
midnight–6 AM
Drizzle, 56°13°30% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 61°16°–69°21°
- Low, likely
- 50°10°–56°13°
- Typical high / low
- 69°21° / 51°11°
- Wind
- 9 mph14 km/h, gusts 16 mph25 km/h
- UV peak
- 4
Saturday, Oct 31. Cloudy. High 64°18°, low 55°13°. Typical 69°21° / 51°11°. Rain 0.19 in4.8 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Sunny, 57°14°30% chance · 0.11 in2.7 mm
Afternoon
noon–6 PM
Cloudy, 65°18°30% chance · 0.04 in0.9 mm
Evening
6 PM–midnight
Drizzle, 63°17°30% chance · 0.05 in1.2 mm
Overnight
midnight–6 AM
Cloudy, 59°15°30% chance · 0.14 in3.7 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 60°16°–68°20°
- Low, likely
- 55°13°–56°13°
- Typical high / low
- 69°21° / 51°11°
- Wind
- 8 mph13 km/h
- UV peak
- 4
Sunday, Nov 1. Cloudy. High 65°18°, low 58°14°. Typical 69°21° / 51°11°. Rain 0.53 in13 mm, 30% chance. Mostly agree.
Morning
6 AM–noon
Cloudy, 59°15°30% chance · 0.29 in7.5 mm
Afternoon
noon–6 PM
Partly sunny, 65°18°20% chance · 0.04 in1.1 mm
Evening
6 PM–midnight
Cloudy, 65°18°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 63°17°–69°21°
- Low, likely
- 55°13°–60°16°
- Typical high / low
- 69°21° / 51°11°
- Wind
- 11 mph17 km/h, gusts 33 mph54 km/h
- UV peak
- 4
The outlook
Today
Dry, high 69°, low 55°.
Tomorrow
Dry, high 72°, low 50°, warming up.
Sunday
Dry, high 72°, low 52°.
Rest of week
Mostly dry, highs 64–69°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (MTR) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 55% less heating than a typical week.
Heating degree days, base 65°F
Comfort
Dry air outside (dew point 54°F).
Open the windows?
Today, 10:00 AM–8:00 PM
Good stretch to open the windows.
Is this typical?
Oct 23, today vs a typical year
Today’s expected high is 2°1° colder than typical.
- Normal high / low
- 71°22° / 52°11°
- Forecast high / low
- 69°21° / 55°13°
- Record high
- 90°32° in 1959
- Record low
- 40°4° in 1949
Last 7 days vs normal
On average 1° warmer than normal (daily mean temperature).
- +9°+5°SatOct 17
- −1°SunOct 18
- −2°−1°MonOct 19
- −1°TueOct 20
- ±0°WedOct 21
- —ThuOct 22
- —FriOct 23
San Mateo weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:25 AM, sunset 6:21 PM.
- Daylight
- 10 h 56 min
- Losing 2 min 11 s a day; shortest Dec 21, 1 h 22 min less
- Golden hour
- 5:45–6:37 PM
- Morning 7:08–8:01 AM
- Blue hour
- 6:37–6:47 PM
- Morning 6:58–7:08 AM; first light 6:58 AM
Stars tonight? Poor
Clouds most of the night (about 49% cover).
Moon
Waxing gibbous
91% lit · growing
- Today
- sets 4:41 AM · rises 4:53 PM
- Full moon
- Oct 25
- New moon
- Nov 8
