Weather WorldG-1 Lake, MO Weather Forecast
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G-1 Lake Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  |  |  |  | | | | | | |  |
| Mostly Sunny | Clearing | Patchy Fog | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Sunny | Chance of T-Storm | Mostly Sunny | Mostly Clear |
| Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Hi: 81°FHi: 27°C Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C Lo: 65°FLo: 18°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C |
| POP: 70% | POP: 40% | POP: 50% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 323 AM CDT Mon Aug 17 2026 
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G-1 Lake Forecast Discussion
Issued: 317 AM CDT Mon Aug 17 2026
Key Messages
- Temperatures more typical of late summer are forecast this week.
- Multiple rounds of showers and thunderstorms are possible Tuesday night through Thursday.
Aviation
/00Z TAFS THROUGH 06Z TUESDAY/... Issued at 1118 PM CDT Sun Aug 16 2026
Scattered showers and thunderstorms will continue moving through eastern Missouri and southern Illinois tonight. While the strongest storms will likely be through our area into eastern Illinois by 06-07Z, a few lingering weak...