Weather in Union, IA
Updated 2026-09-26 11:45 local time · ZIP codes 50258
Light rain
No government weather alerts were returned for this location at the latest update.
Next hours
51°80% rain52°78% rain
57°26% rain55°28% rain
56°29% rain56°27% rain
56°15% rain58°29% rain
59°30% rain59°22% rain
59°17% rain
58°27% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance reaches about 78% over the next 12 hours.
It feels like 47°F with winds near 10 mph.
56°F, 15% rain chance and 11 mph wind.
Visibility is around 5 mi; gusts may reach 24 mph.
Current temperature is 51°F, wind 10 mph, rain chance up to 78%.
UV index is 1.
Local weather characteristics in Union
Iowa has a continental climate with hot summers, cold winters, strong winds and a notable spring and summer severe-thunderstorm season.
Union is part of the Midwest weather region. The forecast point is near 42.25°N latitude and 93.06°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Union weather today
Light rain and 51°F in Union, IA. Today's high is 59°F with a 91% rain chance. Winds are around 10 mph with gusts near 23 mph. Relative humidity is 96%, pressure is 30.14 inHg, and visibility is about 5 miles.
Tonight and tomorrow in Union
Sunrise is at 07:04 AM and sunset is at 07:03 PM. Tomorrow's forecast calls for Overcast with a high near 64°F and a low near 57°F. The maximum rain chance is 52%.