Williams, CA Weather

Colusa County2:36 PM PDT39.15°N, 122.15°WElevation 82 ft

Current conditions

Slight Chance Showers And Thunderstorms
67°
Slight Chance Showers And Thunderstorms
Feels like 67°
High 73°·Low 53°
WindENE 3 mph
Humidity79%
Dew point60°
Cloud cover90%
UV index3 Moderate
Sunrise7:25 AM
Sunset6:23 PM

Observed at SAC NWR · 1 hr ago

Forecast

10-day

  • This Afternoon

    A slight chance of showers and thunderstorms before 3pm. Mostly cloudy, with a high near 73. Southeast wind around 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

  • Tonight

    Rain likely. Cloudy. Low around 53, with temperatures rising to around 56 overnight. Southeast wind 1 to 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

  • Thursday

    Rain likely. Mostly cloudy. High near 69, with temperatures falling to around 67 in the afternoon. Southeast wind 1 to 5 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.

National Weather Service forecast updated 3 hrs ago.

Hourly

Hourly forecast
  1. Now Slight Chance Showers And Thunderstorms 71°16%
  2. 3 PM Cloudy 72°12%
  3. 4 PM Mostly Cloudy 71°12%
  4. 5 PM Partly Sunny 72°14%
  5. 6 PM Slight Chance Light Rain 71°15%
  6. 7 PM Slight Chance Light Rain 66°15%
  7. 8 PM Chance Light Rain 63°25%
  8. 9 PM Chance Light Rain 61°46%
  9. 10 PM Light Rain Likely 60°64%
  10. 11 PM Light Rain Likely 59°61%
  11. Thu12 AM Chance Light Rain 59°49%
  12. 1 AM Chance Light Rain 58°37%
  13. 2 AM Slight Chance Light Rain 57°19%
  14. 3 AM Slight Chance Light Rain 57°19%
  15. 4 AM Chance Light Rain 56°29%
  16. 5 AM Chance Light Rain 56°44%
  17. 6 AM Chance Light Rain 55°46%
  18. 7 AM Chance Light Rain 54°31%
  19. 8 AM Chance Light Rain 56°35%
  20. 9 AM Chance Light Rain 58°31%
  21. 10 AM Chance Light Rain 61°25%
  22. 11 AM Chance Light Rain 61°43%
  23. 12 PM Chance Light Rain 63°49%
  24. 1 PM Light Rain Likely 64°57%

Daily forecast

Details
  1. TodayOct 21 Slight Chance Showers And Thunderstorms Slight Chance Showers And Thunderstorms64%53°73°
  2. ThuOct 22 Light Rain Likely Light Rain Likely65%51°69°
  3. FriOct 23 Mostly Sunny Mostly Sunny46°73°
  4. SatOct 24 Sunny Sunny43°75°
  5. SunOct 25 Mostly Sunny Mostly Sunny44°74°
  6. MonOct 26 Sunny Sunny45°73°
  7. TueOct 27 Mostly Sunny Mostly Sunny44°73°
  8. WedOct 28 Sunny Sunny52°81°
  9. ThuOct 29 Sunny Sunny49°78°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

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Weather news near Williams

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Air quality

59
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • WedGood
  • ThuGood

Gridley, CA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:25 AM
Sunset 6:23 PM
Daylight 10 h 57 min (−2 min 24 s tomorrow)
Waxing Gibbous · 80% lit
Moonrise 4:01 PM Moonset 2:36 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Record high92° (2003)
Record low41° (2004)

County Line California, records since 1994. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in STO, issued 1 hr 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.