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St. John, MO Weather Forecast

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St. John, MO Weather Forecast

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St. John MO weather - Mostly Clear - 71°F
Mostly Clear
71°F
Updated 5:46 am
Feels Like 76°F
Humidity 90%
Wind N 0 mph
Barometer  29.86 in
Dew Point 68°F
St. John MO weather - Mostly Clear - 22°C
Mostly Clear
22°C
Updated 5:46 am
Feels Like 24°C
Humidity 90%
Wind N 0 km/h
Barometer  101.1 kPa
Dew Point 20°C
WX Settings

St. John Weather Forecast

REST OF TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY
St. John, MO Weather - Rest Of Tonight Patchy Fog St. John, MO Weather - Saturday Patchy Fog St. John, MO Weather - Saturday Night Partly Cloudy St. John, MO Weather - Sunday Chance Of T-Storm St. John, MO Weather - Sunday Night Chance Of T-Storm St. John, MO Weather - Monday Chance Of T-Storm St. John, MO Weather - Monday Night Mostly Clear St. John, MO Weather - Tuesday Mostly Clear St. John, MO Weather - Tuesday Night Partly Cloudy St. John, MO Weather - Wednesday Chance Of T-Storm St. John, MO Weather - Wednesday Night Chance Of T-Storm St. John, MO Weather - Thursday Chance Of T-Storm
Patchy Fog Patchy Fog Partly Cloudy Chance of T-Storm Chance of T-Storm Chance of T-Storm Mostly Clear Mostly Clear Partly Cloudy Chance of T-Storm Chance of T-Storm Chance of T-Storm
Lo: 69°FLo: 21°C Hi: 91°FHi: 33°C
 Lo: 69°FLo: 21°C Hi: 89°FHi: 32°C
 Lo: 61°FLo: 16°C Hi: 89°FHi: 32°C
 Hi: 95°FHi: 35°C
Lo: 70°FLo: 21°C		 Hi: 95°FHi: 35°C
Lo: 70°FLo: 21°C		 Lo: 71°FLo: 22°C Hi: 95°FHi: 35°C
 Lo: 71°FLo: 22°C Hi: 89°FHi: 32°C
POP: 40% POP: 40% POP: 40% POP: 20% POP: 20% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 202 AM CDT Sat Sep 12 2026 St. John, MO Weather - WeatherWorld.com

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Issued: 304 AM CDT Sat Sep 12 2026

Key Messages

  • There is a chance (20-30%) for showers and thunderstorms across central and northeast Missouri into west central Illinois late this afternoon and tonight. The chance for rain spreads southeast across the area on Sunday.
  • Temperatures will remain above normal for most of the area into next week with a chance for rain continuing, mainly across northern Missouri into central Illinois.

Aviation

/00Z TAFS THROUGH 06Z SUNDAY/... Issued at 1037 PM CDT Fri Sep 11 2026

VFR conditions with calm to...