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Alleghany, CA Weather
It is 45°F in Alleghany, CA, observed at 1:33 AM PDT. Today: Showers And Thunderstorms, high 45°F, low 43°F. Hourly and 7-day forecast from the National Weather Service. Times are local (PDT).
Alleghany, CA current weather
45°F
Chance Light Rain
H 45° / L 43°Feels like 45°
Observed at WHITE CLOUD (10.2 mi away), 10/31/2026, 1:33 AM PDT
Hourly forecast
NWS, updated 10/31/2026, 2:01 AM PT
7-day forecast
Tap a day for details
Today10/3193% chance of precipitationLow 43°High 45°
Saturday: Rain before 11am, then showers and thunderstorms between 11am and 5pm, then rain likely. Cloudy, with a high near 45. South wind around 3 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Overnight: Rain. Mostly cloudy. Low around 43, with temperatures rising to around 45 overnight. Wind around 0 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers And ThunderstormsSun11/1Low 39°High 48°
Sunday: Mostly sunny, with a high near 48. West southwest wind around 2 mph.
Sunday Night: Mostly clear, with a low around 39. Northeast wind 1 to 6 mph.
Mostly SunnyMon11/228% chance of precipitationLow 44°High 57°
Monday: Mostly sunny, with a high near 57.
Monday Night: A chance of rain after 4am. Mostly cloudy, with a low around 44.
Mostly SunnyTue11/341% chance of precipitationLow 42°High 53°
Tuesday: A chance of rain. Partly sunny, with a high near 53.
Tuesday Night: A chance of rain. Partly cloudy, with a low around 42.
Chance Light RainWed11/426% chance of precipitationLow 44°High 55°
Wednesday: A chance of rain. Mostly sunny, with a high near 55.
Wednesday Night: A chance of rain. Partly cloudy, with a low around 44.
Chance Light RainThu11/527% chance of precipitationLow 42°High 54°
Thursday: A chance of rain. Mostly sunny, with a high near 54.
Thursday Night: A chance of rain. Partly cloudy, with a low around 42.
Chance Light RainFri11/627% chance of precipitationLow High 57°
Friday: A chance of rain before 4pm. Mostly sunny, with a high near 57.
Chance Light Rain
Forecast for 39.467, -120.842 from the NWS STO office, updated 10/31/2026, 2:01 AM PT · Official forecast on weather.gov
From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.
Next 6 hours
NWS hourly forecast
- Now45°Chance Light Rain29%0 mph
- 3 AM45°Chance Light Rain37%0 mph
- 4 AM45°Chance Light Rain49%0 mph
- 5 AM45°Light Rain79%0 mph
- 6 AM45°Light Rain77%1 mph
- 7 AM43°Light Rain79%1 mph
Hourly details
Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShowHide
Radar and satellite
National radarNEXRAD (up to 24 hours) and GOES
Frequently asked questions
- What is the weather in Alleghany, CA right now?
- The latest observation from WHITE CLOUD was 45°F, reported at 10/31/2026, 1:33 AM PDT.
- What is the high temperature today in Alleghany, CA?
- The National Weather Service forecast for saturday calls for a high near 45°F. Showers And Thunderstorms.
- Will it rain in Alleghany, CA in the next 24 hours?
- The hourly forecast shows a 79% chance of precipitation around 10/31/2026, 5:00 AM PDT.
- What time is sunrise and sunset in Alleghany, CA today?
- Sunrise is about 7:30 AM PDT and sunset is about 6:02 PM PDT (calculated for the center of the area, within a few minutes).
- What is the normal October weather in Alleghany, CA?
- At Downieville, the 1991 to 2020 normal high in October is 72°F and the normal low is 39°F.
Nearby hazards
California hazardsSevere 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)
- 34GoodOzone
- AQI forecast tomorrow (Colfax)
- 34GoodOzone
Drought
By countySierra County, week of 10/27/2026
22% of the county is in moderate drought or worse.
Sun and moon
Local time, center of the area
- Sunrise
- 7:30 AM
- Sunset
- 6:02 PM
- Daylight
- 10 hr 32 min
- Moon
- Waning Gibbous 72% lit
- First light (civil dawn)
- 7:03 AM
- Last light (civil dusk)
- 6:30 PM
- Moonrise
- 11:08 PM
- Moonset
- 1:36 PM
Normal October weather
ClimateNormal October high 72°, low 39°, precipitation 3.34 in for the month. 1991 to 2020 normals at Downieville, 7 mi away.
Other places nearby
Data sources
- National Weather Service APINOAA · Official site
- Convective Outlooks and Storm ReportsNOAA Storm Prediction Center · Official site
- Excessive Rainfall Outlook and Quantitative Precipitation ForecastsNOAA Weather Prediction Center · Official site
- National Water Prediction ServiceNOAA National Weather Service · Official site
- WFIGS Current Wildland Fire IncidentsNational Interagency Fire Center · Official site
- UV Index Forecast (Envirofacts)U.S. Environmental Protection Agency and NOAA · Official site
- AirNowU.S. Environmental Protection Agency · Official site
- NWS HeatRisk (experimental)NOAA National Weather Service · Official site
- U.S. Drought MonitorNational Drought Mitigation Center, USDA and NOAA · Official site
- BEACON 2.0 Beach Advisory and Closing On-line NotificationU.S. Environmental Protection Agency · Official site
- U.S. Climate Normals 1991-2020NOAA National Centers for Environmental Information · Official site
- Tides & Currents (CO-OPS API)NOAA Center for Operational Oceanographic Products and Services · Official site
- NEXRAD radar tilesIowa Environmental Mesonet, Iowa State University · Official site
- GOES-East and GOES-West GeoColor imageryNOAA NESDIS Center for Satellite Applications and Research · Official site
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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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