Weather World
Grayson County, KY Official WebsiteGrayson County, KY Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Grayson County Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  |  | | |  | | | | |
| Partly Cloudy | Partly Sunny | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C |
| POP: 40% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 308 PM CDT Sun Sep 20 2026 
Grayson County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Grayson County Weather Map
Grayson County Quick Facts
Grayson County Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 720 PM EDT Sun Sep 20 2026
Key Messages
- Unseasonably hot weather will continue area-wide this afternoon and over southern Kentucky tomorrow, with afternoon heat indices near 100 degrees.
- While an isolated storm can`t be ruled out this afternoon, the best chances (30-40%) will be tonight into Monday morning near and north of I-64, and again Monday afternoon and evening along and south of the Western Kentucky and Bluegrass Parkways. Dry weather is forecast to rest of the week.
- Milder weather will gradually overspread the are...