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Bethlehem Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
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| Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Partly Sunny | Partly Cloudy | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy |
| Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C |
| POP: 20% | POP: 50% | POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 641 AM EDT Sat Sep 05 2026 
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Issued: 1127 AM EDT Sat Sep 5 2026
Key Messages
1. Slight risk of severe thunderstorms across most of the forecast area this afternoon and evening. The risk for severe storms is less on Sunday, but non-zero. Make sure you have multiple ways to receive warnings, especially if you have outdoor plans. 2. Hot and humid again today with triple digit heat index values returning east of the mountains. A Heat Advisory remains in effect today from 11 AM to 8 PM for the southern zones. Make sure to stay hydrated and take frequent breaks in ...