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Alta Sierra, CA 95949 Weather

Today: Mostly Sunny, high 64°F, low 49°F. Hourly and 10-day forecast from the National Weather Service. Times are local (PDT).

Alta Sierra, CA 95949 current weather

63°F

Mostly Sunny

Forecast for this hour. No recent report from a nearby station.

H 64° / L 49°

  • No rain expected in the next 12 hours

No recent station report. NWS hourly forecast updated 10/30/2026, 2:21 PM PT

Hourly forecast

NWS, updated 10/30/2026, 2:21 PM PT

  1. Now63°11%
  2. 5 PM62°
  3. 6 PM60°
  4. 7 PM57°
  5. 8 PM52°
  6. 9 PM51°
  7. 10 PM50°
  8. 11 PM50°
  9. 12 AM50°Sat
  10. 1 AM50°
  11. 2 AM50°14%
  12. 3 AM50°27%
  13. 4 AM50°29%
  14. 5 AM50°59%
  15. 6 AM49°56%
  16. 7 AM49°56%
  17. 8 AM50°36%
  18. 9 AM51°37%
  19. 10 AM53°46%
  20. 11 AM54°48%
  21. 12 PM54°42%
  22. 1 PM54°57%
  23. 2 PM55°56%
  24. 3 PM56°54%
  25. 4 PM56°56%
  26. 5 PM55°47%
  27. 6 PM54°35%
  28. 7 PM51°16%
  29. 8 PM50°31%
  30. 9 PM50°31%
  31. 10 PM49°28%
  32. 11 PM49°41%
  33. 12 AM48°19%Sun
  34. 1 AM48°
  35. 1 AM48°16%
  36. 2 AM47°30%
  37. 3 AM47°24%
  38. 4 AM46°18%
  39. 5 AM46°18%
  40. 6 AM46°18%
  41. 7 AM46°18%
  42. 8 AM48°18%
  43. 9 AM50°18%
  44. 10 AM53°
  45. 11 AM55°
  46. 12 PM58°
  47. 1 PM59°
  48. 2 PM60°

10-day forecast

Tap a day for details

  • Today10/3059% chance of precipitationLow 49°High 64°

    This Afternoon: Mostly sunny. High near 64, with temperatures falling to around 62 in the afternoon. South southwest wind around 3 mph.

    Tonight: Rain likely after 3am. Mostly cloudy, with a low around 49. East southeast wind around 3 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

    Mostly Sunny
  • Sat10/3157% chance of precipitationLow 46°High 56°

    Saturday: Rain likely before 8am, then showers and thunderstorms likely between 8am and 5pm, then a chance of rain. Cloudy, with a high near 56. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

    Saturday Night: A chance of rain before 11pm, then areas of fog and a chance of rain between 11pm and 2am, then a chance of rain and patchy fog between 2am and 3am, then patchy fog and a slight chance of rain. Mostly cloudy, with a low around 46. East southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

    Showers And Thunderstorms Likely
  • Sun11/118% chance of precipitationLow 43°High 60°

    Sunday: A slight chance of rain before 10am. Mostly sunny, with a high near 60. West northwest wind around 5 mph. Chance of precipitation is 20%.

    Sunday Night: Mostly clear, with a low around 43.

    Slight Chance Light Rain then Mostly Sunny
  • Mon11/2Low 46°High 63°

    Monday: Mostly sunny, with a high near 63.

    Monday Night: Mostly cloudy, with a low around 46.

    Mostly Sunny
  • Tue11/312% chance of precipitationLow 46°High 64°

    Tuesday: Mostly sunny, with a high near 64.

    Tuesday Night: Partly cloudy, with a low around 46.

    Mostly Sunny
  • Wed11/417% chance of precipitationLow 46°High 63°

    Wednesday: A slight chance of rain between 10am and 4pm. Partly sunny, with a high near 63.

    Wednesday Night: Partly cloudy, with a low around 46.

    Slight Chance Light Rain
  • Thu11/523% chance of precipitationLow 45°High 62°

    Thursday: A slight chance of rain after 10am. Mostly sunny, with a high near 62.

    Thursday Night: A slight chance of rain before 10pm. Partly cloudy, with a low around 45.

    Slight Chance Light Rain
  • Fri11/6Model blendLow 45°High 68°

    Friday: Partly cloudy. High near 68°. Low that night near 45°. About 0.01 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Sat11/7Model blendLow 46°High 70°

    Saturday: Mostly sunny. High near 70°. Low that night near 46°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Sun11/8Model blendLow 48°High 70°

    Sunday: Partly cloudy. High near 70°. Low that night near 48°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 39.112, -121.127 from the NWS STO office, updated 10/30/2026, 2:21 PM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KLHM (Lincoln Rgnl, 18 mi), model run 10/30/2026, 1:00 PM PDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now63°Mostly Sunny11%3 mph
  2. 5 PM62°Mostly Sunny7%3 mph
  3. 6 PM60°Mostly Clear5%2 mph
  4. 7 PM57°Mostly Clear5%2 mph
  5. 8 PM52°Partly Cloudy7%3 mph
  6. 9 PM51°Partly Cloudy7%3 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

What is the high temperature today in Alta Sierra, CA 95949?
The National Weather Service forecast for this afternoon calls for a high near 64°F. Mostly Sunny.
Will it rain in Alta Sierra, CA 95949 in the next 24 hours?
The hourly forecast shows a 59% chance of precipitation around 10/31/2026, 5:00 AM PDT.
What is the 10-day forecast for Alta Sierra, CA 95949?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 6 to Nov 8) come from the NOAA National Blend of Models, with highs of 68°F to 70°F. Model guidance this far out often changes.
What time is sunrise and sunset in Alta Sierra, CA 95949 today?
Sunrise is about 7:30 AM PDT and sunset is about 6:05 PM PDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Alta Sierra, CA 95949?
At Grass Valley #2, the 1991 to 2020 normal high in October is 72°F and the normal low is 44°F.

Nearby hazards

California hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: None reported

UV and air quality forecast

EPA and AirNow

AQI forecast today (Colfax)
38GoodOzone
AQI forecast tomorrow (Colfax)
34GoodOzone

UV index guide · Air quality

Drought

By county

Nevada County, week of 10/27/2026

10% of the county is in moderate drought or worse.

Sun and moon

Local time, center of the area

Sunrise
7:30 AM
Sunset
6:05 PM
Daylight
10 hr 36 min
Moon
Waning Gibbous 76% lit
First light (civil dawn)
7:02 AM
Last light (civil dusk)
6:33 PM
Moonrise
9:54 PM
Moonset
12:47 PM

Normal October weather

Climate

Normal October high 72°, low 44°, precipitation 2.56 in for the month. 1991 to 2020 normals at Grass Valley #2, 7 mi away.

Other places nearby

Data sources

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About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

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