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Belfast Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  | |  | | | |  | | |
| Chance of Showers | Mostly Sunny | Mostly Cloudy | Partly Sunny | Chance of Showers | Showers | Chance of Showers | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Lo: 55°FLo: 13°C | Hi: 70°FHi: 21°C | Lo: 45°FLo: 7°C | Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Lo: 49°FLo: 9°C | Hi: 59°FHi: 15°C | Lo: 45°FLo: 7°C | Hi: 59°FHi: 15°C | |
| POP: 40% | POP: 90% | POP: 90% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM EDT Thu Sep 17 2026 
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Instant definitions for any meteorological term.
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Issued: 734 PM EDT Thu Sep 17 2026
Key Messages
1) Any scattered showers will end this evening, with some patchy fog overnight across the higher terrain of the Southern Tier.
2) Dry weather will prevail Friday through Saturday.
3) A chance of showers will return Saturday night through Sunday, followed by a cooler pattern next week.
Discussion
... KEY MESSAGE 1...Any scattered showers will end this evening, with some patchy fog overnight across the higher terrain of the Southern Tier.
A weak east-west oriented frontal zone will remain s...