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Blackhawk, CA Weather

It is 55°F in Blackhawk, CA, observed at 8:30 PM PDT. Tonight: Mostly Cloudy, low 46°F. Hourly and 10-day forecast from the National Weather Service. Times are local (PDT).

Blackhawk, CA current weather

55°F

Partly Cloudy

H -- / L 46°Feels like 55°

  • No rain expected in the next 12 hours

Observed at FW3625 San Ramon (5.8 mi away), 10/30/2026, 8:30 PM PDT

Hourly forecast

NWS, updated 10/30/2026, 1:26 PM PT

  1. Now53°
  2. 9 PM51°
  3. 10 PM50°
  4. 11 PM49°
  5. 12 AM49°Sat
  6. 1 AM48°
  7. 2 AM48°
  8. 3 AM48°
  9. 4 AM47°
  10. 5 AM48°
  11. 6 AM47°
  12. 7 AM48°
  13. 8 AM48°
  14. 9 AM51°
  15. 10 AM54°
  16. 11 AM57°
  17. 12 PM58°
  18. 1 PM59°
  19. 2 PM60°
  20. 3 PM60°
  21. 4 PM60°
  22. 5 PM58°
  23. 6 PM55°
  24. 7 PM52°
  25. 8 PM50°
  26. 9 PM49°
  27. 10 PM48°
  28. 11 PM48°
  29. 12 AM47°Sun
  30. 1 AM47°16%
  31. 1 AM46°22%
  32. 2 AM46°28%
  33. 3 AM46°16%
  34. 4 AM46°
  35. 5 AM45°
  36. 6 AM45°
  37. 7 AM46°
  38. 8 AM49°
  39. 9 AM52°
  40. 10 AM56°
  41. 11 AM58°
  42. 12 PM60°
  43. 1 PM61°
  44. 2 PM62°
  45. 3 PM62°
  46. 4 PM60°
  47. 5 PM57°
  48. 6 PM53°

10-day forecast

Tap a day for details

  • Today10/30Low 46°High

    Tonight: Mostly cloudy. Low around 46, with temperatures rising to around 48 overnight. Southwest wind around 2 mph.

    Mostly Cloudy
  • Sat10/3128% chance of precipitationLow 45°High 60°

    Saturday: Mostly cloudy. High near 60, with temperatures falling to around 58 in the afternoon. Southwest wind 2 to 7 mph.

    Saturday Night: A chance of rain showers between 1am and 4am, then patchy fog. Mostly cloudy, with a low around 45. West southwest wind 1 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

    Mostly Cloudy
  • Sun11/1Low 43°High 62°

    Sunday: Patchy fog before 8am. Mostly sunny, with a high near 62. Northwest wind 1 to 6 mph.

    Sunday Night: Mostly clear, with a low around 43. North wind 0 to 6 mph.

    Patchy Fog then Mostly Sunny
  • Mon11/2Low 45°High 62°

    Monday: Mostly sunny, with a high near 62.

    Monday Night: Mostly cloudy, with a low around 45.

    Mostly Sunny
  • Tue11/310% chance of precipitationLow 46°High 63°

    Tuesday: Mostly sunny, with a high near 63.

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

    Mostly Sunny
  • Wed11/413% chance of precipitationLow 47°High 62°

    Wednesday: Patchy fog between 7am and 8am. Mostly sunny, with a high near 62.

    Wednesday Night: Patchy fog after 5am. Partly cloudy, with a low around 47.

    Patchy Fog then Mostly Sunny
  • Thu11/514% chance of precipitationLow 46°High 61°

    Thursday: Areas of fog before 9am. Mostly sunny, with a high near 61.

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

    Areas Of Fog then Mostly Sunny
  • Fri11/610% chance of precipitationLow High 63°

    Friday: Mostly sunny, with a high near 63.

    Mostly Sunny
  • 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 72°

    Sunday: Mostly sunny. High near 72°. 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 37.819, -121.916 from the NWS MTR office, updated 10/30/2026, 1:26 PM PT · Official forecast on weather.gov

Days 9 to 10: NOAA National Blend of Models, station KLVK (Livermore Muni, 10 mi), model run 10/30/2026, 7:00 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. Now53°Partly Cloudy1%2 mph
  2. 9 PM51°Partly Cloudy1%1 mph
  3. 10 PM50°Partly Cloudy1%1 mph
  4. 11 PM49°Partly Cloudy1%1 mph
  5. 12 AM49°Partly Cloudy1%1 mph
  6. 1 AM48°Mostly Cloudy0%1 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 weather in Blackhawk, CA right now?
The latest observation from FW3625 San Ramon was 55°F, reported at 10/30/2026, 8:30 PM PDT.
Will it rain in Blackhawk, CA in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Blackhawk, CA?
The first 8 days come from the National Weather Service forecast. Days 9 to 10 (Nov 7 to Nov 8) come from the NOAA National Blend of Models, with highs of 70°F to 72°F. Model guidance this far out often changes.
What time is sunrise and sunset in Blackhawk, CA today?
Sunrise is about 7:31 AM PDT and sunset is about 6:11 PM PDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Blackhawk, CA?
At Mt Diablo Junction, the 1991 to 2020 normal high in October is 72°F and the normal low is 54°F.

Rain and snow totals

Next 3 days, NWS forecast grid

Rain (liquid)
0.03 in
Snow
0.00 in
Ice
0.00 in

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 tomorrow (Concord)
50GoodPM2.5
AQI forecast tomorrow (Concord)
44GoodPM2.5

UV index guide · Air quality

Drought

By county

Contra Costa County, week of 10/27/2026

No drought or abnormal dryness in this county.

Tides nearby

NOAA tide stations

Sun and moon

Local time, center of the area

Sunrise
7:31 AM
Sunset
6:11 PM
Daylight
10 hr 40 min
Moon
Waning Gibbous 74% lit
First light (civil dawn)
7:04 AM
Last light (civil dusk)
6:38 PM
Moonrise
10:02 PM
Moonset
12:45 PM

Normal October weather

Climate

Normal October high 72°, low 54°, precipitation 1.19 in for the month. 1991 to 2020 normals at Mt Diablo Junction, 4 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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