Sunnyvale, California weather
United States · America/Los_Angeles · 37.37, -122.04
“Use my location” asks your browser for your coordinates so we can load your local forecast and any official warnings for your area. Your coordinates are used for that request only: they are not stored on our servers, sold, or used to build a profile. If your browser blocks location, we fall back to an approximate city-level lookup from your IP address.
Sunnyvale, CA Weather Today
Current conditions, hourly and 7 day forecast, official severe weather alerts, and air quality for Sunnyvale, California. Every section shows where the data came from and when it was last checked.
Your briefing
Sunnyvale, California
- Right now
- No official warning for this location. 87° and clear sky.Observed
- Next few hours
- No rain in the forecast for the next few hours.Forecast
- Your day
- Best outdoor window: 6 AM to 9 AM.Our reading
Official warnings for this location come from NOAA / National Weather Service. Lines marked Our reading are WeatherSignal’s reading of the measurements and forecast, not an official statement.
Sunnyvale, California
87°
Clear sky
Feels like 87° · High 90° · Low 87°
Clear sky here right now. Nothing falling.
Warm and clear tonight. 87° right now. Overnight low around 87°. Tomorrow starts clear sky. Sunrise is at 11:00 PM.
- Overnight low 87°
- Sunrise 11:00 PM
- Rain overnight 0%
Next few hours
Now
87°
—
3 PM
90°
—
4 PM
90°
—
5 PM
89°
—
6 PM
84°
—
- Rain chance
- 0%
- Wind
- 4 mph NNW
- Humidity
- 18%
- Air quality
- No reading
Source updated: 10:00:59 PM · WeatherSignal checked: 10:00:59 PM
What matters today
Six quick answers for Sunnyvale. Tap Why? on any of them to see the reasoning.
Umbrella
Nah (Good)
Best time
11 PM (Good)
Dog walk
11 PM (Good)
Car wash
Go for it (Good)
Cookout
Green light (Good)
Windows
Crack them (Mixed)
Today's Signal
Good day
82/100
Mostly favorable, but the warmth and poor visibility will make it less comfortable outside.
Feels like 87° · Visibility 0.0 mi
Today is about 18° warmer than the rest of the week.
See exactly how this number was worked out
Every location starts at 100. Points come off for heat, cold, rain, wind, UV, humidity, poor visibility, and any official alert. Nothing is ever added back.
- Starting score100
- Feels like 87°: warm-8
- Visibility 0.0 mi-10
- Final Signal82
Next 12 hours
Steady conditions, but the temperature swings about 22° across the next 12 hours.
- 4 PMWarmest stretch · 90°
- 11 PMSunrise
- 2 AMCoolest stretch · 68°
- 3 PM—90 degrees, 0 percent chance of rain
- 4 PM—90 degrees, 0 percent chance of rain
- 5 PM—89 degrees, 0 percent chance of rain
- 6 PM—84 degrees, 0 percent chance of rain
- 7 PM—79 degrees, 0 percent chance of rain
- 8 PM—77 degrees, 0 percent chance of rain
- 9 PM—73 degrees, 0 percent chance of rain
- 10 PM—71 degrees, 0 percent chance of rain
- 11 PM—70 degrees, 0 percent chance of rain
- 12 AM—69 degrees, 0 percent chance of rain
- 1 AM—69 degrees, 0 percent chance of rain
- 2 AM—68 degrees, 0 percent chance of rain
The line is temperature by hour. The number under each hour is the chance of rain. Scroll sideways for the full 12 hours.
Next change
It keeps cooling down overnight
Temperatures fall from about 90° to 68° over the next 12 hours. There is no meaningful rain signal in the next several hours.
WeatherSignal NOW: Sunnyvale, California
One number for everything happening around you, from 0 to 100.
96
NORMAL
Nothing here needs your attention right now.
Tap any line to see exactly what added or subtracted points. Every rule is published on our methodology page. This is an informational signal, not a safety rating: official warnings always come first.
What this means
Generated from the forecast values above using fixed rules: not an AI guess.
- No significant precipitation is expected in the next 24 hours.
Next 24 hours
Will it rain during your commute? When does the storm arrive?
See all 47 hours (2 days) — free
| Time | Condition | Temp | Feels | Precip % | Amount | Wind | Humidity |
|---|---|---|---|---|---|---|---|
| 3 PM | Clear sky | 90° | 90° | 0% | 0.00″ | 5 NNW | 15% |
| 4 PM | Clear sky | 90° | 90° | 0% | 0.00″ | 5 NNW | 14% |
| 5 PM | Clear sky | 89° | 89° | 0% | 0.00″ | 6 NW | 15% |
| 6 PM | Clear sky | 84° | 84° | 0% | 0.00″ | 5 NW | 18% |
| 7 PM | Clear sky | 79° | 79° | 0% | 0.00″ | 5 NNW | 23% |
| 8 PM | Clear sky | 77° | 77° | 0% | 0.00″ | 4 NNW | 27% |
| 9 PM | Clear sky | 73° | 73° | 0% | 0.00″ | 3 NW | 33% |
| 10 PM | Clear sky | 71° | 71° | 0% | 0.00″ | 3 WSW | 38% |
| 11 PM | Clear sky | 70° | 70° | 0% | 0.00″ | 2 SSE | 39% |
| 12 AM | Clear sky | 69° | 69° | 0% | 0.00″ | 3 SSE | 38% |
| 1 AM | Clear sky | 69° | 69° | 0% | 0.00″ | 2 S | 37% |
| 2 AM | Clear sky | 68° | 68° | 0% | 0.00″ | 2 W | 40% |
| 3 AM | Clear sky | 67° | 67° | 0% | 0.00″ | 3 SSW | 38% |
| 4 AM | Clear sky | 66° | 66° | 0% | 0.00″ | 3 S | 37% |
| 5 AM | Clear sky | 66° | 66° | 0% | 0.00″ | 2 SSE | 36% |
| 6 AM | Clear sky | 66° | 66° | 0% | 0.00″ | 2 SW | 38% |
| 7 AM | Clear sky | 65° | 65° | 0% | 0.00″ | 1 WSW | 39% |
| 8 AM | Clear sky | 66° | 66° | 0% | 0.00″ | 2 WSW | 38% |
| 9 AM | Clear sky | 70° | 70° | 0% | 0.00″ | 3 NNW | 31% |
| 10 AM | Clear sky | 75° | 75° | 0% | 0.00″ | 3 NNW | 27% |
| 11 AM | Clear sky | 80° | 80° | 0% | 0.00″ | 4 N | 22% |
| 12 PM | Clear sky | 85° | 85° | 0% | 0.00″ | 5 N | 19% |
| 1 PM | Clear sky | 88° | 88° | 0% | 0.00″ | 5 N | 17% |
| 2 PM | Clear sky | 89° | 89° | 0% | 0.00″ | 7 NNW | 16% |
7-day forecast
Confidence decreases the further out you look.
Today
Clear sky
90° / 87°
- Precip:
- 0% · 0.00″
- Wind:
- 5 mph
- UV:
- 4.8
- Sun:
- 11 PM to 11 AM
Sat, Oct 17
Clear sky
90° / 65°
- Precip:
- 0% · 0.00″
- Wind:
- 8 mph
- UV:
- 5.1
- Sun:
- 11 PM to 11 AM
Sun, Oct 18
Clear sky
86° / 57°
- Precip:
- 0% · 0.00″
- Wind:
- 11 mph
- UV:
- 5.1
- Sun:
- 11 PM to 11 AM
Mon, Oct 19
Partly cloudy
67° / 56°
- Precip:
- 0% · 0.00″
- Wind:
- 9 mph
- UV:
- 0.5
- Sun:
- 11 PM to 11 AM
Tue, Oct 20
Clear sky
64° / 57°
- Precip:
- 0% · 0.00″
- Wind:
- 8 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Wed, Oct 21
Clear sky
62° / 53°
- Precip:
- 0% · 0.00″
- Wind:
- 1 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Thu, Oct 22
Clear sky
66° / 52°
- Precip:
- 0% · 0.00″
- Wind:
- 4 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Forecasts describe likely conditions, not guaranteed outcomes. Official warnings from your national weather service always take precedence over anything shown here.
Sunnyvale hourly weather
Hour by hour, out to eight days ahead.
Sunnyvale 7 day forecast
Highs, lows and rain chance for the week.
Air quality detail
Pollutants, category, and official guidance.