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Armstrong, MO Weather Forecast
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Armstrong Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  | | | | | | | |  |  |
| Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Sunny | Chance of Showers | Chance of Showers |
| Lo: 75°FLo: 24°C | Hi: 102°FHi: 39°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 100°FHi: 38°C Lo: 75°FLo: 24°C | Hi: 100°FHi: 38°C Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Hi: 90°FHi: 32°C Lo: 70°FLo: 21°C | Hi: 90°FHi: 32°C Lo: 70°FLo: 21°C |
| POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1042 PM CDT Fri Sep 04 2026 
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Instant definitions for any meteorological term.
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Issued: 520 PM CDT Fri Sep 4 2026
Key Messages
- Hazardous heat continues. An Extreme Heat Warning remains in effect areawide until 8 PM Saturday. Areas along and south of a line from St. Joseph, MO to Boonville, MO will remain under a Extreme Heat Warning until 8 PM Tuesday.
- Low-end chances (20-30%) for rain Sunday into Monday morning, generally across northern Missouri. Next rain chances arrive midweek.
Discussion
... Issued at 201 PM CDT Fri Sep 4 2026
No significant changes to the forecast were made in this cycle. Deterministic an...