Weather Alert
Union Weather Warning NWS WEATHER ALERT FOR THE UNION, MO AREA - Issued: 219 AM CDT Thu Sep 17 2026 Union Weather Warning

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Union, MO Weather Forecast

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Union, MO Weather Forecast

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Union MO weather - Clear - 89°F
Clear
89°F
Updated 11:42 am
Feels Like 91°F
Humidity 66%
Wind N 0 mph
Barometer  30.23 in
Dew Point 77°F
Union MO weather - Clear - 32°C
Clear
32°C
Updated 11:42 am
Feels Like 33°C
Humidity 66%
Wind N 0 km/h
Barometer  102.4 kPa
Dew Point 25°C
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Union Weather Forecast

REST OF TODAY TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT
Union, MO Weather - Rest Of Today Chance Of T-Storm Union, MO Weather - Tonight Chance Of T-Storm Union, MO Weather - Friday Sunny Union, MO Weather - Friday Night Mostly Clear Union, MO Weather - Saturday Sunny Union, MO Weather - Saturday Night Partly Cloudy Union, MO Weather - Sunday Chance Of T-Storm Union, MO Weather - Sunday Night Chance Of T-Storm Union, MO Weather - Monday Chance Of T-Storm Union, MO Weather - Monday Night Chance Of T-Storm Union, MO Weather - Tuesday Chance Of Showers Union, MO Weather - Tuesday Night Partly Cloudy
Chance of T-Storm Chance of T-Storm Sunny Mostly Clear Sunny Partly Cloudy Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Showers Partly Cloudy
Hi: 95°FHi: 35°C
 Lo: 71°FLo: 22°C Hi: 95°FHi: 35°C
 Lo: 71°FLo: 22°C Hi: 95°FHi: 35°C
 Lo: 70°FLo: 21°C Hi: 91°FHi: 33°C
 Lo: 69°FLo: 21°C Hi: 85°FHi: 29°C
 Lo: 61°FLo: 16°C Hi: 79°FHi: 26°C
 Hi: 80°FHi: 27°C
Lo: 59°FLo: 15°C
POP: 20% POP: 20% POP: 20% POP: 50% POP: 60% POP: 50% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 958 AM CDT Thu Sep 17 2026 Union, MO Weather - WeatherWorld.com

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Issued: 625 AM CDT Thu Sep 17 2026

Key Messages

  • A late season heat wave continues through at least Saturday with peak heat index values of 100-105F+ along/south of I-70.
  • Scattered showers with an isolated sub-severe thunderstorm are possible (20-30%) across portions of the area this afternoon/evening.

Aviation

/12Z TAFS THROUGH 18Z FRIDAY/... Issued at 615 AM CDT Thu Sep 17 2026

Dry VFR conditions exist across the regional terminals this morning, now completely on the warm side of a stalled front across southern Iowa and northern Ill...