Weather WorldLake Jefferson, NY Weather Forecast
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Lake Jefferson Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Chance of Rain | Partly Sunny | Patchy Fog | Chance of Showers | Chance of Showers | Chance of T-Storm | Partly Cloudy | Partly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Sunny |
| Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C |
| POP: 20% | POP: 50% | POP: 50% | POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 935 PM EDT Thu Aug 20 2026 
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Issued: 749 PM EDT Thu Aug 20 2026
Key Messages
1) A low pressure system will bring cool temperatures and rain showers to the area this afternoon into the evening. Most of the rain will be south of the Mohawk Valley. High pressure builds in behind the system, bringing pleasant and dry conditions to the region on Friday
2) A deep upper level trough over the east coast this weekend will drive periods of showers across the area Saturday and Sunday, lingering into Monday. High pressure will move into the r...