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Vallejo, CA Weather
Current conditions
Observed at Vacaville Nut Tree Airport · 1 hr ago
Forecast
10-day-
Wednesday Night
A chance of rain after 7pm. Mostly cloudy, with a low around 56. West wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
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Thursday
A chance of rain before 5pm. Mostly cloudy, with a high near 61. West southwest wind 2 to 10 mph. Chance of precipitation is 40%.
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Thursday Night
Partly cloudy, with a low around 53.
National Weather Service forecast updated 1 day ago.
Hourly
Hourly forecast- Now62°45%
- 8 PM62°
- 9 PM61°11%
- 10 PM61°39%
- 11 PM60°34%
- Thu12 AM59°42%
- 1 AM59°31%
- 2 AM58°26%
- 3 AM58°37%
- 4 AM57°36%
- 5 AM57°35%
- 6 AM57°35%
- 7 AM56°35%
- 8 AM56°35%
- 9 AM57°35%
- 10 AM58°35%
- 11 AM59°39%
- 12 PM60°39%
- 1 PM60°39%
- 2 PM60°39%
- 3 PM60°39%
- 4 PM60°39%
- 5 PM60°
- 6 PM60°
Daily forecast
Details- TueOct 20Mostly Cloudy14%56°61°
- TodayOct 21Chance Light Rain45%56°63°
- ThuOct 22Chance Light Rain39%53°61°
- FriOct 23Mostly Sunny52°65°
- SatOct 24Sunny53°66°
- SunOct 25Mostly Sunny53°65°
- MonOct 26Mostly Sunny52°65°
- TueOct 27Cloudy56°78°
- WedOct 28Cloudy56°74°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Vallejo
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- WedGood (36)
- ThuGood (37)
- FriGood
Concord, CA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Nearby
- San Francisco 39 km
- Oakland 33 km
- Santa Rosa 55 km
- Hayward 51 km
- Concord 24 km
- Berkeley 26 km
- Fairfield 25 km
- Antioch 41 km
- Richmond 20 km
- Daly City 48 km
- Vacaville 37 km
- San Leandro 43 km
Forecasters' discussion
From the National Weather Service office in STO, issued 6 hrs ago
Key Messages
- Scattered showers, thunderstorms, and high elevation snow showers expected through late Thursday.
- Drier weather moves in Friday and into the weekend, with breezy north to east winds Friday.
- Ridge builds in over the weekend, with slight chances for showers in Shasta county.
.DISCUSSION...
...Today through Thursday...
Current radar has a swath of rain and isolated thunderstorms through the Coastal Range down toward the Sierra Foothills. The track is to the north-northwest. We have seen a few lightning strikes over the past couple of hours, but they remain few and far between storms. There are gaps of coverage in the rain as it moves through the area, but HIRES guidance continues to show the swath of rain filling in completely over the next several hours and begin to push toward the north and east as the main upper level system off the coast moves onshore. Instability has been lacking in the latest observations, with only up to 250 J/kg across the Valley, foothills, and mountains. This will likely continue for the rest of the afternoon. Cloud coverage is the key into keeping the instability lower than expected. None the less, moisture content is high and lift is present to development thunderstorms and at least maintain them through this evening. The question remains on if these storms will be able to sustain hail shafts long enough to produce nickel or even quarter size hail. As of right now, we are leaning toward small hail as a possibility and brief gusty winds in the strongest of storms. Brief heavy rain and frequent lightning will also be a hazard to watch out for.
Aviation
Showers and isolated thunderstorms will be possible through the afternoon and into the evening hours, with lowered ceilings. Ceilings should remain VFR, but chances are there for MVFR for all sites post 00z. Best timeframe for thunderstorms will be 2000z through 0400z for all sites. Winds will remain light throughout the day. Areas in and around thunderstorms may see erratic winds, brief moderate rain reducing visibilities and IFR ceilings. Otherwise, we are looking at a lull in activity later tonight around 09-10z through the mid morning hours. During this lull isolated to scattered showers at times for the sites. Near the end of the TAF period thunderstorm chances start to increase once again.
Sto Watches
None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.