🇺🇸 Weather in Sunnyvale
Map Overlays:
Hourly Forecast for Sunnyvale
15:00
26°
0%
16:00
25°
0%
17:00
24°
0%
18:00
23°
0%
19:00
20°
0%
20:00
18°
0%
21:00
14°
0%
22:00
12°
2%
23:00
11°
2%
00:00
11°
3%
01:00
10°
3%
02:00
10°
4%
03:00
10°
4%
04:00
9°
4%
05:00
9°
5%
06:00
10°
4%
07:00
11°
3%
08:00
14°
1%
09:00
16°
1%
10:00
19°
0%
11:00
21°
0%
12:00
22°
0%
13:00
23°
0%
14:00
23°
1%
14-Day Forecast for Sunnyvale
2026-06-06
Sunny
27° /
10°
2026-06-07
Sunny
24° /
9°
2026-06-08
Partly Cloudy
22° /
10°
2026-06-09
Patchy rain nearby
24° /
12°
2026-06-10
Sunny
29° /
10°
2026-06-11
Sunny
32° /
14°
2026-06-12
Sunny
33° /
15°
Additional Forecasts for Sunnyvale
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 103.0 μg/m³
O₃ (Ozone) 83.0 μg/m³
NO₂ (Nitrogen Dioxide) 0.8 μg/m³
SO₂ (Sulphur Dioxide) 0.7 μg/m³
PM2.5 (Fine particles) 8.2 μg/m³
PM10 (Coarse particles) 12.8 μg/m³
Historical Weather
Weather Forecasts for Other Cities in United States
Weather in Sunnyvale — FAQ
Answers refreshed each request based on current conditions in Sunnyvale.
What is the weather like right now in Sunnyvale?
Right now in Sunnyvale, United States the temperature is 23.2°C (feels like 23.8°C), with sunny. Relative humidity is 31% and wind is 16.6 km/h.
What is today's high and low temperature in Sunnyvale?
Today's forecast high in Sunnyvale is 26.8°C and the overnight low is 10.5°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Sunnyvale today?
The chance of precipitation in Sunnyvale today is 1%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Sunnyvale differ from nearby cities?
Even short distances can change temperatures noticeably. Sunnyvale's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.