Weather World
Foster Lake, MO Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Foster Lake Weather Forecast
| THIS AFTERNOON | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY |
 |  |  |  |  |  | | |  | | |
| Sunny | Partly Cloudy | Partly Sunny | Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy |
| Hi: 95°FHi: 35°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C Lo: 59°FLo: 15°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 Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 55°FLo: 13°C |
| POP: 50% | POP: 70% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1227 PM CDT Sat Sep 19 2026 
Foster Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Foster Lake Weather Map
Foster Lake Quick Facts
Foster Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 130 PM CDT Sat Sep 19 2026
Key Messages
- A Heat Advisory remains in effect through 8 PM tonight. Highs in the upper 90s with heat index values of 100 to 105 degrees can be expected. Daily records may continue to be tied or broken.
- Shower and thunderstorm chances (40-70%) return Sunday afternoon and evening, and persist into Monday. A low chance (5%) for an isolated strong to severe thunderstorm, with the primary risk being quarter sized hail and damaging wind gusts up to 60 mph.
- Near average temperatures in the 70s to near ...