Current Conditions

Vallejo, California

65°F18°C
Clear

Wind

SW 6 mph10 km/h

Humidity

76%

Cloud Cover

3%

As of Tuesday, September 22, 2026 at 6:31 PM PDT

Today's Outlook

Night

Partly cloudy, with a low around 55°F13°C. Light wind from the SW around 4 mph6 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
ClearHigh 85°F29°CLow 55°F13°CPrecip 0 in0 mmCloud 29%Wind WSW 3 mph5 km/hWednesday: Partly cloudy and warm, with a high of 85°F29°C and morning low of 56°F14°C. Light wind from the WSW around 2 mph4 km/h. Wednesday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the SW around 4 mph6 km/h.
Partly CloudyHigh 82°F28°CLow 56°F13°CPrecip 0 in0 mmCloud 64%Wind WSW 5 mph8 km/hThursday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 57°F14°C. Breezy from the WSW at 5 to 9 mph9 to 14 km/h. Thursday Night: Mostly cloudy, with a low around 56°F13°C. Light wind from the WSW around 5 mph7 km/h.
ClearHigh 80°F26°CLow 59°F15°CPrecip 0 in0 mmCloud 26%Wind WSW 6 mph10 km/hFriday: Partly cloudy and warm, with a high of 80°F26°C and morning low of 61°F16°C. Breezy from the WSW at 8 to 9 mph12 to 14 km/h. Friday Night: Partly cloudy, with a low around 59°F15°C. Light wind from the SW around 5 mph8 km/h.
ClearHigh 78°F26°CLow 54°F12°CPrecip 0 in0 mmCloud 33%Wind SW 4 mph7 km/hSaturday: Partly cloudy and warm, with a high of 78°F26°C and morning low of 56°F13°C. Breezy from the SW at 5 to 8 mph7 to 12 km/h. Dry air. Saturday Night: Partly cloudy, with a low around 54°F12°C. Light wind from the SW around 4 mph7 km/h.
ClearHigh 73°F23°CLow 55°F13°CPrecip 0 in0 mmCloud 36%Wind SW 7 mph11 km/hSunday: Partly cloudy and warm, with a high of 73°F23°C and morning low of 57°F14°C. Breezy from the SW at 8 to 9 mph12 to 15 km/h. Sunday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the SW around 6 mph9 km/h.
ClearHigh 77°F25°CLow 54°F12°CPrecip 0 in0 mmCloud 23%Wind WSW 5 mph8 km/hMonday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 55°F13°C. Breezy from the WSW at 5 to 8 mph8 to 12 km/h. Monday Night: Mostly clear, with a low around 54°F12°C. Light wind from the SW around 4 mph7 km/h.
ClearHigh 81°F27°CLow 54°F12°CPrecip 0 in0 mmCloud 19%Wind WSW 4 mph7 km/hTuesday: Mostly clear and warm, with a high of 81°F27°C and morning low of 57°F14°C. Breezy from the WSW at 5 to 7 mph7 to 11 km/h. Dry air. Tuesday Night: Mostly clear, with a low around 54°F12°C. Light wind from the WSW around 4 mph7 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2385°F29°C55°F13°C0 in0 mm· —29%ClearWSW 3 mph5 km/h
ThursdaySep 2482°F28°C56°F13°C0 in0 mm· —64%Partly CloudyWSW 5 mph8 km/h
FridaySep 2580°F26°C59°F15°C0 in0 mm· —26%ClearWSW 6 mph10 km/h
SaturdaySep 2678°F26°C54°F12°C0 in0 mm· —33%ClearSW 4 mph7 km/h
SundaySep 2773°F23°C55°F13°C0 in0 mm· —36%ClearSW 7 mph11 km/h
MondaySep 2877°F25°C54°F12°C0 in0 mm· —23%ClearWSW 5 mph8 km/h
TuesdaySep 2981°F27°C54°F12°C0 in0 mm· —19%ClearWSW 4 mph7 km/h
WednesdaySep 3081°F27°C56°F13°C0 in0 mm· —26%ClearWSW 5 mph8 km/h
ThursdayOct 180°F27°C57°F14°C0 in0 mm· —30%ClearWSW 5 mph8 km/h
FridayOct 283°F28°C56°F13°C0 in0 mm· —15%ClearW 4 mph7 km/h
SaturdayOct 385°F29°C58°F14°C0 in0 mm· —13%ClearW 4 mph7 km/h
SundayOct 484°F29°C58°F14°C0 in0 mm· —18%ClearWSW 5 mph7 km/h
MondayOct 582°F28°C58°F14°C0 in0.1 mm· 2%16%ClearWSW 4 mph7 km/h
TuesdayOct 682°F28°C58°F14°C0 in0 mm· —22%ClearWSW 5 mph8 km/h
WednesdayOct 781°F27°C58°F14°C0.01 in0.3 mm· 3%28%ClearWSW 4 mph7 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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 38.1041°N, 122.2566°W·Elevation: 21m·Timezone: America/Los_Angeles·Population: 121,692