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Perth Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  | | | | | | |  | | |
| Chance of T-Storm | Chance of T-Storm | Clearing | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Cloudy |
| Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C Lo: 59°FLo: 15°C |
| POP: 50% | POP: 30% | POP: 20% | POP: 30% | POP: 20% | POP: 20% | POP: 50% | POP: 50% | POP: 40% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 351 PM EDT Thu Sep 17 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 234 PM EDT Thu Sep 17 2026
Key Messages
- Hot temperatures will continue at times into Saturday, especially south. Heat indices around 100 again today southwest.
- Persistent showers and storms overnight could lead to narrow swaths of 2+ inches of rain. A Flood Watch has been issued beginning at 10AM and ending at 10PM EDT
- Shower and storm chances persist for much of the time into next week, with temperatures turning cooler next week
Discussion
(This evening through Thursday)... Issued at 223 PM EDT Thu Sep 17 2026
Today and Toni...