Weather World
Glenallen, MO Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Glenallen Weather Forecast
| THIS AFTERNOON | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | MONDAY NIGHT | TUESDAY |
 |  |  | | | | |  |  |  |  | |
| Chance of Showers | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Mostly Sunny |
| 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 | 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: 70°FLo: 21°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 90°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 90°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C |
| POP: 20% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1233 PM CDT Wed Sep 16 2026 
Glenallen Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Glenallen Weather Map
Glenallen Quick Facts
Glenallen Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1211 PM CDT Wed Sep 16 2026
Key Messages
- The dangerous record breaking late season heat wave will continue over the next several days. A Heat Advisory is now in effect through Sunday evening for the entire region.
- There is a 20-30% chance of an isolated shower or thunderstorm this afternoon, mainly near and north of I-64. Lower chances linger Thursday into Friday.
- Relief from the heat and humidity arrives early next week with high temperatures trending cooler into the 80s. Daily isolated showers and thunderstorms will also ...