Weather World
Greenbrier, MO Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Greenbrier Weather Forecast
| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY | WEDNESDAY |
 |  |  | | | | | | | |
| Chance of Showers | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear |
| Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 237 PM CDT Thu Sep 03 2026 
Greenbrier Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Greenbrier Weather Map
Greenbrier Quick Facts
Greenbrier Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 239 PM CDT Thu Sep 3 2026
Key Messages
- An Extreme Heat Warning remains in effect through Saturday for a prolonged dangerous heatwave with daily heat index values ranging from 103-110 degrees. There is a 30-70% chance of needing to extend advisory level heat headlines into Sunday over southeast Missouri and adjacent portions of southern Illinois and west Kentucky.
- Multiple consecutive days of near record high temperatures in the upper 90s to 100 degrees and several record warm overnight low temperatures in the mid to upper...