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Lake Arrowhead Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | | | | | | |  |  | |  |
| Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Clearing |
| Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C |
| POP: 20% | POP: 40% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 605 AM CDT Thu Sep 17 2026 
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Issued: 1051 PM CDT Wed Sep 16 2026
Key Messages
Issued at 1050 PM CDT Wed Sep 16 2026- Hazardous heat will persist through the weekend, with little rainfall expected over the next seven days.
- An areawide Heat Advisory is in effect through 8 PM Saturday.
- A frontal boundary will bring increased rain chances to the Mid-South early next week. Above normal temperatures are likely to continue into next week
Discussion
... (Tonight through next Wednesday) Issued at 1050 PM CDT Wed Sep 16 2026
A 600 dam upper ridge is centered over the Mid-So...