Ukiah, CA Weather

Mendocino County4:32 PM PDT39.15°N, 123.21°WElevation 633 ft

Current conditions

Mostly Clear
72°
Mostly Clear
Feels like 70°
High 74°·Low 51°
WindCalm
Humidity35%
Dew point43°
Pressure29.82 inHg
Visibility10 mi
Cloud cover83%
UV index1 Low
Sunrise7:29 AM
Sunset6:27 PM

Observed at Ukiah Municipal Airport · 52 min ago

Forecast

10-day

  • Today

    A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 74. Southwest wind 0 to 7 mph. Chance of precipitation is 30%.

  • Tonight

    Rain showers likely. Cloudy, with a low around 51. West wind 0 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.

  • Thursday

    Rain showers likely before 8am, then rain showers likely and areas of fog between 8am and 5pm. Cloudy, with a high near 67. West northwest wind 0 to 3 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.

National Weather Service forecast updated 6 hrs ago.

Hourly

Hourly forecast
  1. Now Chance Showers And Thunderstorms 72°33%
  2. 5 PM Slight Chance Rain Showers 71°17%
  3. 6 PM Slight Chance Rain Showers 69°17%
  4. 7 PM Slight Chance Rain Showers 67°17%
  5. 8 PM Chance Rain Showers 63°43%
  6. 9 PM Chance Rain Showers 62°43%
  7. 10 PM Chance Rain Showers 60°43%
  8. 11 PM Rain Showers Likely 58°63%
  9. Thu12 AM Rain Showers Likely 58°63%
  10. 1 AM Rain Showers Likely 56°63%
  11. 2 AM Rain Showers Likely 55°60%
  12. 3 AM Rain Showers Likely 54°60%
  13. 4 AM Rain Showers Likely 54°60%
  14. 5 AM Rain Showers Likely 52°74%
  15. 6 AM Rain Showers Likely 52°74%
  16. 7 AM Rain Showers Likely 51°74%
  17. 8 AM Rain Showers Likely 51°74%
  18. 9 AM Rain Showers Likely 53°74%
  19. 10 AM Rain Showers Likely 56°74%
  20. 11 AM Rain Showers Likely 58°64%
  21. 12 PM Rain Showers Likely 59°64%
  22. 1 PM Rain Showers Likely 62°64%
  23. 2 PM Rain Showers Likely 63°64%
  24. 3 PM Rain Showers Likely 63°64%

Daily forecast

Details
  1. TodayOct 21 Chance Showers And Thunderstorms Chance Showers And Thunderstorms74%51°74°
  2. ThuOct 22 Rain Showers Likely Rain Showers Likely74%46°67°
  3. FriOct 23 Areas Of Fog then Mostly Sunny Areas Of Fog then Mostly Sunny40°75°
  4. SatOct 24 Sunny Sunny43°80°
  5. SunOct 25 Mostly Sunny Mostly Sunny43°77°
  6. MonOct 26 Mostly Sunny Mostly Sunny12%41°74°
  7. TueOct 27 Mostly Sunny Mostly Sunny43°75°
  8. WedOct 28 Mostly clear Mostly clear40°76°
  9. ThuOct 29 Sunny Sunny43°76°

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

Radar

Full map
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Weather news in California

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Air quality

37
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Ukiah, 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 7:29 AM
Sunset 6:27 PM
Daylight 10 h 57 min (−2 min 24 s tomorrow)
Waxing Gibbous · 81% lit
Moonrise 4:06 PM Moonset 2:40 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low77° / 44°
Record high96° (1929)
Record low26° (1906)
Wettest1.44 in (1985)
Yesterday71° / 48°
Month to date0.00 in (normal 0.91 in)

Ukiah Area, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in EKA, issued 16 hrs ago

Key Messages

* Probable rainfall totals trend higher Wednesday through Thursday afternoon, mainly for the interior.

* Seasonable temperatures, with a higher chance for frost and subfreezing temperatures for the interior late in the week and beyond.

* A drier scenario is becoming more likely for the expected weekend disturbance.

Synopsis

Chance for rainfall increases throughout Wednesday, with higher chances overnight and into Wednesday. A cold front will then quickly dry out the environment and bring broad areas of frost and some interior freezes late in the week.

Discussion

An area of low pressure is observed on mid level water vapor imagery off the coast of central and southern California. The low is sending wraparound moisture into N California from the SE. Ongoing shower activity will increase through the day for areas initially generally south of Cape Mendocino. This moisture will then push farther north through Humboldt and likely to Del Norte County later Wednesday through Thursday.

The low is forecast to tap into some deeper subtropical moisture south of southern California and send it our way. Now to complications in the forecast. There remains question in how much moisture wraps into our area from over the higher terrain to the east. The current forecast of total rainfall is on the lower end, with areas east through Lake, Southern Mendocino, and Trinty County in the 0.25 to 0.5 in inch total through Thursday. These forecast amounts have increased, and align closer to the mean estimate. There is very large differences from the high resolution REFS ensemble max, which has a broad area over 1 inch, and locally 1.75 inches that expands farther west into Humboldt for the extreme scenario.

We've discussed the argument for the lower end amounts, but a scenario for the higher end is plausible. The low will usher in modest elevated instability, with a potential for some thunderstorms. The mentioned subtropical moisture will yield some precipitable water values over 1 inch. Given the nature of cutoff, stalled lows, small deviations in the track are possible, and this can yield much large changes in the rainfall amount. Anytime there is instability with anomalously high precipitable waters amounts, models can underestimate what is actually produced.

Northerly winds will turn gusty Friday, followed by a strong NE wind surge Friday night. Any valleys that do clear out Thursday night will likely see frost or freezing temperatures, and if we get the forecast coverage of rainfall, interior fog would suppress the chances for frost and freezes. The dry offshore winds Friday night should allow for things to clear and and get cold, particularly Saturday morning when frost conditions may expand to the coast. JJW

Aviation

6Z TAFs...Low level moisture is increasing under a shallow inversion. There is a potential for shallow marine stratus advancing down the coast, with at least tempo fog visibility. Probability of LIFR CIGS are around 40 to 50% at CEC and up to 64% for ACV. Chances for visibly under 1sm is near 30%. An area of low pressure offshore will deliver instability, which has been know to weaken the inversion and allow for scattering. This continues to give uncertainty in the forecast, though the instability is elevated which may keep to TAF forecast on track.

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 4Search index and reflects what the press published. Terms of use.