Observed 3:35 AM PDT at KNUQ
Sunnyvale, CA weather
Overcast and 59°15°.
Today: low 52°11° (likely 52°11° to 54°12°), high 67°19° (likely 66°19° to 68°20°).
Now 59°15°
Cloudy
- Wind
- Calm
- Up to 9 mph14 km/h through 4 PM
- Dew point
- 54°12°
- Comfortable
- UV index
- 0Low
- Moderate 11 AM–4 PM · peak 5
- Air quality
- 52Moderate
- PM2.5 (fine particles) · tomorrow good
- Pressure
- 30 inHg1016 hPa
- Rising slowly · +0.02 inHg+0.7 hPa in 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
TonightNear 54°12° · Mostly cloudy
This morningUp to 61°16° by 11 AM · Mostly cloudy
This afternoonNear 65°18° · Partly cloudy
TonightDown to 47°8° by 5 AM · Clear
Tomorrow morningUp to 62°17° by 11 AM · Clear
Tomorrow afternoonUp to 70°21° by 3 PM · Clear
Tomorrow nightDown to 51°11° by 3 AM · Clear
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Fri 4a | Cloudy | 54°12° (likely 54°12° to 58°14°) | 54°12° | 0% | 2 mph3 km/h from W, gusts 4 mph6 km/h | 100% | 83% | 0 |
| Fri 5a | Cloudy | 53°12° (likely 53°12° to 58°14°) | 53°12° | 0% | 2 mph3 km/h from WNW, gusts 3 mph4 km/h | 100% | 86% | 0 |
| Fri 6a | Cloudy | 53°12° (likely 53°12° to 58°14°) | 53°12° | 0% | 1 mph2 km/h from W, gusts 3 mph5 km/h | 100% | 85% | 0 |
| Fri 7a | Cloudy | 52°11° (likely 52°11° to 58°14°) | 52°11° | 0% | 1 mph2 km/h from S, gusts 3 mph5 km/h | 100% | 82% | 0 |
| Fri 8a | Fog | 53°12° (likely 53°12° to 57°14°) | 53°12° | 0% | 1 mph2 km/h from N, gusts 3 mph4 km/h | 100% | 66% | 0 |
| Fri 9a | Fog | 56°13° (likely 56°13° to 59°15°) | 56°13° | 0% | 1 mph2 km/h from NNW, gusts 3 mph5 km/h | 100% | 48% | 1 |
| Fri 10a | Mostly sunny | 59°15° (likely 59°15° to 60°16°) | 59°15° | 0% | 3 mph5 km/h from NW, gusts 7 mph11 km/h | 100% | 47% | 2 |
| Fri 11a | Partly sunny | 61°16° (likely 61°16° to 62°17°) | 61°16° | 0% | 6 mph10 km/h from NNW, gusts 9 mph15 km/h | 95% | 70% | 3 |
| Fri 12p | Partly sunny | 64°18° (likely 62°17° to 64°18°) | 64°18° | 0% | 7 mph11 km/h from NNW, gusts 10 mph16 km/h | 88% | 76% | 4 |
| Fri 1p | Partly sunny | 65°18° (likely 63°17° to 65°18°) | 65°18° | 0% | 8 mph13 km/h from NNW, gusts 11 mph17 km/h | 85% | 70% | 5 |
| Fri 2p | Mostly sunny | 66°19° (likely 64°18° to 67°19°) | 66°19° | 0% | 8 mph13 km/h from NNW, gusts 12 mph20 km/h | 83% | 61% | 4 |
| Fri 3p | Mostly sunny | 67°19° (likely 66°19° to 68°20°) | 67°19° | 0% | 9 mph14 km/h from NNW, gusts 13 mph21 km/h | 78% | 41% | 3 |
| Fri 4p | Sunny | 67°19° (likely 66°19° to 68°20°) | 67°19° | 0% | 9 mph14 km/h from NNW, gusts 15 mph23 km/h | 73% | 17% | 1 |
| Fri 5p | Sunny | 66°19° (likely 65°18° to 68°20°) | 67°19° | 0% | 9 mph14 km/h from NNW, gusts 13 mph21 km/h | 73% | 10% | 2 |
| Fri 6p | Clear | 64°18° (likely 63°17° to 65°18°) | 64°18° | 0% | 7 mph11 km/h from NW, gusts 12 mph19 km/h | 78% | 1% | 1 |
| Fri 7p | Clear | 60°16° (likely 59°15° to 62°17°) | 61°16° | 0% | 6 mph10 km/h from NW, gusts 12 mph20 km/h | 84% | 0% | 0 |
| Fri 8p | Clear | 59°15° (likely 56°13° to 60°16°) | 59°15° | 0% | 5 mph8 km/h from NW, gusts 9 mph15 km/h | 84% | 0% | 0 |
| Fri 9p | Clear | 58°14° (likely 54°12° to 58°14°) | 58°14° | 0% | 5 mph8 km/h from NW, gusts 6 mph10 km/h | 85% | 0% | 0 |
| Fri 10p | Clear | 56°13° (likely 53°12° to 56°13°) | 56°13° | 0% | 5 mph8 km/h from WNW, gusts 6 mph9 km/h | 85% | 0% | 0 |
| Fri 11p | Clear | 55°13° (likely 52°11° to 55°13°) | 55°13° | 0% | 5 mph8 km/h from W, gusts 6 mph9 km/h | 85% | 0% | 0 |
| Sat 12a | Clear | 54°12° (likely 51°11° to 54°12°) | 54°12° | 0% | 3 mph5 km/h from W, gusts 5 mph8 km/h | 85% | 0% | 0 |
| Sat 1a | Clear | 53°12° (likely 49°9° to 53°12°) | 53°12° | 0% | 3 mph5 km/h from W, gusts 5 mph9 km/h | 84% | 2% | 0 |
| Sat 2a | Clear | 51°11° (likely 48°9° to 53°12°) | 51°11° | 0% | 3 mph5 km/h from W, gusts 4 mph6 km/h | 84% | 0% | 0 |
| Sat 3a | Clear | 50°10° (likely 47°8° to 53°12°) | 50°10° | 0% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 83% | 0% | 0 |
| Sat 4a | Clear | 49°9° (likely 47°8° to 53°12°) | 49°9° | 0% | 2 mph3 km/h from W, gusts 5 mph7 km/h | 83% | 0% | 0 |
| Sat 5a | Clear | 47°8° (likely 46°8° to 53°12°) | 47°8° | 0% | 2 mph3 km/h from ENE, gusts 3 mph5 km/h | 83% | 0% | 0 |
| Sat 6a | Clear | 47°8° (likely 45°7° to 52°11°) | 47°8° | 0% | 2 mph3 km/h from ENE, gusts 4 mph6 km/h | 85% | 1% | 0 |
| Sat 7a | Sunny | 47°8° (likely 45°7° to 51°11°) | 47°8° | 0% | 2 mph3 km/h from ENE, gusts 3 mph5 km/h | 84% | 1% | 0 |
| Sat 8a | Sunny | 47°8° (likely 45°7° to 51°11°) | 47°8° | 0% | 2 mph3 km/h from NNE, gusts 3 mph5 km/h | 80% | 8% | 0 |
| Sat 9a | Sunny | 53°12° (likely 49°9° to 55°13°) | 53°12° | 0% | 2 mph3 km/h from NNE, gusts 4 mph7 km/h | 74% | 6% | 1 |
| Sat 10a | Sunny | 58°14° (likely 55°13° to 61°16°) | 58°14° | 0% | 2 mph3 km/h from NNE, gusts 6 mph10 km/h | 67% | 1% | 2 |
| Sat 11a | Sunny | 62°17° (likely 60°16° to 64°18°) | 62°17° | 0% | 3 mph5 km/h from NNW, gusts 6 mph9 km/h | 57% | 1% | 3 |
| Sat 12p | Sunny | 66°19° (likely 63°17° to 67°19°) | 66°19° | 0% | 3 mph5 km/h from NNW, gusts 6 mph9 km/h | 49% | 0% | 4 |
| Sat 1p | Sunny | 68°20° (likely 66°19° to 69°21°) | 68°20° | 0% | 3 mph5 km/h from NNW, gusts 6 mph10 km/h | 48% | 1% | 5 |
| Sat 2p | Sunny | 69°21° (likely 67°19° to 71°22°) | 69°21° | 0% | 5 mph8 km/h from NNW, gusts 6 mph10 km/h | 48% | 1% | 5 |
| Sat 3p | Sunny | 70°21° (likely 68°20° to 72°22°) | 70°21° | 0% | 5 mph8 km/h from NNW, gusts 6 mph10 km/h | 48% | 0% | 4 |
| Sat 4p | Sunny | 70°21° (likely 67°19° to 72°22°) | 70°21° | 0% | 5 mph8 km/h from NNW, gusts 7 mph11 km/h | 48% | 9% | 3 |
| Sat 5p | Sunny | 69°21° (likely 66°19° to 71°22°) | 69°21° | 0% | 2 mph3 km/h from NW, gusts 8 mph13 km/h | 51% | 40% | 2 |
| Sat 6p | Clear | 66°19° (likely 64°18° to 68°20°) | 66°19° | 0% | 2 mph3 km/h from NW, gusts 9 mph14 km/h | 60% | 40% | 1 |
| Sat 7p | Clear | 63°17° (likely 60°16° to 63°17°) | 63°17° | 0% | 2 mph3 km/h from NW, gusts 9 mph14 km/h | 65% | 33% | 0 |
| Sat 8p | Clear | 60°16° (likely 57°14° to 60°16°) | 60°16° | 0% | 0 mph0 km/h, gusts 5 mph7 km/h | 68% | 30% | 0 |
| Sat 9p | Clear | 58°14° (likely 55°13° to 59°15°) | 58°14° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 70% | 35% | 0 |
| Sat 10p | Clear | 56°13° (likely 52°11° to 59°15°) | 56°13° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 71% | 24% | 0 |
| Sat 11p | Clear | 55°13° (likely 51°11° to 60°16°) | 55°13° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 72% | 13% | 0 |
| Sun 12a | Clear | 54°12° (likely 47°8° to 63°17°) | 54°12° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 73% | 0% | 0 |
| Sun 1a | Clear | 53°12° (likely 45°7° to 62°17°) | 53°12° | 0% | 1 mph2 km/h from E, gusts 3 mph5 km/h | 73% | 2% | 0 |
| Sun 2a | Clear | 52°11° (likely 44°7° to 61°16°) | 52°11° | 0% | 1 mph2 km/h from ESE, gusts 3 mph5 km/h | 74% | 2% | 0 |
| Sun 3a | Mostly clear | 51°11° (likely 43°6° to 61°16°) | 51°11° | 0% | 1 mph2 km/h from ESE, gusts 3 mph5 km/h | 75% | 8% | 0 |
Days ahead
Today, Oct 23. Fog. High 67°19°, low 52°11°. Typical 74°23° / 51°11°. Dry. Forecasts agree.
Morning
6 AM–noon
Fog, 53°12°Dry
Afternoon
noon–6 PM
Mostly sunny, 67°19°Dry
Evening
6 PM–midnight
Clear, 59°15°Dry
Overnight
midnight–6 AM
Clear, 47°8°Dry
Official NWS forecast
Today: Areas of fog before 10am. Mostly sunny, with a high near 67. Northwest wind 1 to 9 mph.
Tonight: Patchy fog after 5am. Mostly cloudy, with a low around 52. West northwest wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 66°19°–68°20°
- Low, likely
- 52°11°–54°12°
- Typical high / low
- 74°23° / 51°11°
- Wind
- 9 mph14 km/h, gusts 19 mph30 km/h
- UV peak
- 5
Tomorrow, Oct 24. Mostly sunny. High 70°21°, low 47°8°. Typical 74°23° / 51°11°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 47°8°Dry
Afternoon
noon–6 PM
Sunny, 70°21°Dry
Evening
6 PM–midnight
Clear, 60°16°Dry
Overnight
midnight–6 AM
Mostly clear, 51°11°Dry
Official NWS forecast
Day: Sunny, with a high near 70. North wind around 5 mph.
Night: Mostly clear, with a low around 47. East northeast wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 68°20°–72°22°
- Low, likely
- 45°7°–50°10°
- Typical high / low
- 74°23° / 51°11°
- Wind
- 6 mph10 km/h, gusts 15 mph23 km/h
- UV peak
- 5
Sunday, Oct 25. Mostly sunny. High 72°22°, low 47°8°. Typical 74°23° / 51°11°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 51°10°Dry
Afternoon
noon–6 PM
Cloudy, 72°22°Dry
Evening
6 PM–midnight
Clear, 61°16°Dry
Overnight
midnight–6 AM
Clear, 52°11°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 72.
Night: Patchy fog after 3am. Partly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 69°21°–74°23°
- Low, likely
- 45°7°–56°13°
- Typical high / low
- 74°23° / 51°11°
- Wind
- 10 mph15 km/h
- UV peak
- 5
Monday, Oct 26. Fog. High 69°21°, low 47°8°. Typical 73°23° / 50°10°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 51°10°Dry
Afternoon
noon–6 PM
Sunny, 68°20°Dry
Evening
6 PM–midnight
Clear, 59°15°Dry
Overnight
midnight–6 AM
Cloudy, 51°10°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 10am. Mostly sunny, with a high near 69.
Night: Patchy fog after 2am. Mostly clear, with a low around 47.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 65°18°–71°22°
- Low, likely
- 45°7°–57°14°
- Typical high / low
- 73°23° / 50°10°
- Wind
- 12 mph19 km/h, gusts 18 mph29 km/h
- UV peak
- 5
Tuesday, Oct 27. Fog. High 67°19°, low 47°8°. Typical 73°23° / 50°10°. Dry. Forecasts agree.
Morning
6 AM–noon
Sunny, 50°10°Dry
Afternoon
noon–6 PM
Sunny, 67°19°Dry
Evening
6 PM–midnight
Clear, 59°15°Dry
Overnight
midnight–6 AM
Clear, 51°10°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 10am. Mostly sunny, with a high near 67.
Night: Patchy fog after 5am. Partly cloudy, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 66°19°–68°20°
- Low, likely
- 46°8°–55°13°
- Typical high / low
- 73°23° / 50°10°
- Wind
- 8 mph14 km/h, gusts 15 mph24 km/h
- UV peak
- 5
Wednesday, Oct 28. Fog. High 67°19°, low 48°9°. Typical 73°23° / 50°10°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 51°10°Dry
Afternoon
noon–6 PM
Cloudy, 68°20°Dry
Evening
6 PM–midnight
Clear, 60°15°Dry
Overnight
midnight–6 AM
Clear, 52°11°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 10am. Partly sunny, with a high near 67.
Night: Patchy fog after 4am. Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 65°18°–69°21°
- Low, likely
- 48°9°–53°12°
- Typical high / low
- 73°23° / 50°10°
- Wind
- 11 mph17 km/h, gusts 16 mph26 km/h
- UV peak
- 4
Thursday, Oct 29. Fog. High 66°19°, low 52°11°. Typical 72°22° / 50°10°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 53°12°Dry
Afternoon
noon–6 PM
Cloudy, 66°19°Dry
Evening
6 PM–midnight
Cloudy, 60°16°Dry
Overnight
midnight–6 AM
Clear, 54°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 10am. Mostly sunny, with a high near 66.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 64°18°–69°21°
- Low, likely
- 50°10°–53°12°
- Typical high / low
- 72°22° / 50°10°
- Wind
- 9 mph14 km/h
- UV peak
- 4
Friday, Oct 30. Sunny. High 67°19°, low 52°11°. Typical 72°22° / 50°10°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 53°12°Dry
Afternoon
noon–6 PM
Sunny, 68°20°Dry
Evening
6 PM–midnight
Clear, 61°16°Dry
Overnight
midnight–6 AM
Clear, 55°13°20% 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 64°18°–70°21°
- Low, likely
- 47°8°–54°12°
- Typical high / low
- 72°22° / 50°10°
- Wind
- 8 mph13 km/h, gusts 16 mph26 km/h
- UV peak
- 4
Saturday, Oct 31. Cloudy. High 66°19°, low 53°12°. Typical 72°22° / 49°9°. Rain 0.2 in5.1 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Sunny, 56°13°30% chance · 0.06 in1.4 mm
Afternoon
noon–6 PM
Cloudy, 66°19°30% chance · 0.09 in2.3 mm
Evening
6 PM–midnight
Drizzle, 63°17°30% chance · 0.05 in1.2 mm
Overnight
midnight–6 AM
Cloudy, 58°15°30% chance · 0.08 in2.1 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
- 59°15°–71°22°
- Low, likely
- 51°11°–54°12°
- Typical high / low
- 72°22° / 49°9°
- Wind
- 5 mph9 km/h, gusts 14 mph22 km/h
- UV peak
- 4
Sunday, Nov 1. Cloudy. High 68°20°, low 57°14°. Typical 72°22° / 49°9°. Rain 0.36 in9.1 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 59°15°20% chance · 0.2 in5 mm
Afternoon
noon–6 PM
Partly sunny, 67°19°20% chance · 0.03 in0.8 mm
Evening
6 PM–midnight
Cloudy, 66°19°20% chance · 0.02 in0.6 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
- 65°18°–73°23°
- Low, likely
- 51°11°–60°16°
- Typical high / low
- 72°22° / 49°9°
- Wind
- 9 mph15 km/h, gusts 27 mph43 km/h
- UV peak
- 4
The outlook
Today
Dry, high 67°, low 52°.
Tomorrow
Dry, high 70°, low 47°, warming up.
Sunday
Dry, high 72°, low 47°.
Rest of week
Mostly dry, highs 66–69°.
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 33% less heating than a typical week.
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 4
- h below 17°F
- 0
- h below 5°F
- 0
47, 17 and 5°F are the test points heat pumps are rated at.
Comfort
Dry air outside (dew point 54°F).
Open the windows?
Today, 2:00 PM–7:00 PM
Good stretch to open the windows.
Is this typical?
Oct 23, today vs a typical year
Today’s expected high is 7°4° colder than typical.
- Normal high / low
- 74°23° / 51°11°
- Forecast high / low
- 67°19° / 52°11°
- Record high
- 90°32° in 1959
- Record low
- 35°2° in 1906
Last 7 days vs normal
On average 1° warmer than normal (daily mean temperature).
- +8°+4°SatOct 17
- +1°±0°SunOct 18
- ±0°MonOct 19
- −2°−1°TueOct 20
- ±0°WedOct 21
- —ThuOct 22
- —FriOct 23
Sunnyvale weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:24 AM, sunset 6:20 PM.
- Daylight
- 10 h 56 min
- Losing 2 min 16 s a day; shortest Dec 21, 1 h 21 min less
- Golden hour
- 5:44–6:36 PM
- Morning 7:07–7:59 AM
- Blue hour
- 6:36–6:46 PM
- Morning 6:57–7:07 AM; first light 6:57 AM
Stars tonight? Poor
Clouds most of the night (about 85% cover).
Moon
Waxing gibbous
91% lit · growing
- Today
- sets 4:40 AM · rises 4:52 PM
- Full moon
- Oct 25
- New moon
- Nov 8
