Weather WorldHalley Grade, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Halley Grade Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  | | | | | | | | | | |
| Mostly Clear | Sunny | Clear | Mostly Sunny | Clear | Sunny | Clear | Clear | Clear | Mostly Clear | Mostly Clear | Clear |
| Lo: 68°FLo: 20°C | Hi: 90°FHi: 32°C | Lo: 64°FLo: 18°C | Hi: 82°FHi: 28°C | Lo: 54°FLo: 12°C | Hi: 77°FHi: 25°C | Lo: 59°FLo: 15°C | Hi: 83°FHi: 28°C Lo: 60°FLo: 16°C | Hi: 83°FHi: 28°C Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 62°FLo: 17°C | Hi: 81°FHi: 27°C Lo: 62°FLo: 17°C | Hi: 81°FHi: 27°C Lo: 62°FLo: 17°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 202 PM PDT Thu Sep 10 2026 
Halley Grade Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Halley Grade Weather Map
Halley Grade Quick Facts
Halley Grade Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1230 PM PDT Thu Sep 10 2026
Key Messages
- Hot, dry and breezy through Thursday, with areas of Moderate HeatRisk and elevated fire weather conditions
- Notable cool down over the weekend, with near to below normal temperatures expected
- Breezy onshore winds Thursday-Saturday followed by gustier north winds Saturday night-Monday with elevated to critical fire weather conditions over the weekend
Discussion
...
Today-Friday:
Mid to high level clouds are once again passing through portions of interior NorCal on GOES-West visible satelli...