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Gretna, MO Weather Forecast
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Gretna Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY |
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| Sunny | Partly Cloudy | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Partly Sunny | Partly Cloudy | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C Lo: 55°FLo: 13°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C |
| POP: 70% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 602 AM CDT Sat Sep 19 2026 
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Issued: 608 AM CDT Sat Sep 19 2026
Key Messages
- A Heat Advisory remains in effect through 8 PM tonight. Highs near 100 with heat index values of 100-105 degrees can be expected. Daily records may continue to be tied or broken.
- Rain and storm chances (15-40%) return late tonight, increasing to 40-80% Sunday and lingering into Monday with a cold frontal passage.
- If several factors align properly, strong winds 50-60 mph and large hail up to the size of quarters could be possible Sunday afternoon (Marginal/Level 1 of 5 Risk for severe...