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Belfast Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | |  |  | | | |  | |  |  |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Clearing | Mostly Clear | Chance of Showers |
| Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C |
| POP: 90% | POP: 90% | POP: 70% | POP: 50% | POP: 60% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 405 PM EDT Wed Sep 09 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 727 PM EDT Wed Sep 9 2026
Key Messages
1) Hot today, cooler the next couple of days, and then warming again into early next week.
2) A system will bring thunderstorms to the region today into Thursday. This will bring the potential for severe weather this afternoon into the evening hours and a flood potential Wednesday night into Thursday. Additional thunderstorms possible Friday into Saturday.
Discussion
... KEY MESSAGE 1) Hot conditions will be present today with highs in the upper 80s to lower 90s. Some heat index values ...