Weather WorldRadnor, PA Weather Forecast
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| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Clear | Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny |
| Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 59°FHi: 15°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM EDT Sun Oct 18 2026 
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Issued: 724 PM EDT Sun Oct 18 2026
Key Messages
1. Frost concerns for portions of the area later tonight into early Monday morning.
2. A nor`easter developing off the coast of the southern Mid- Atlantic is expected to bring coastal impacts and create hazardous marine conditions through at least the middle of this week.
3. A prolonged period of onshore flow will lead to multiple elevated high tide cycles this week resulting in rounds of coastal flooding.
Discussion
... KEY MESSAGE 1. Frost concerns for portions of the area later tonigh...