Weather World
Union County, IA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Union County, IA Weather Forecast
Union County, IA Weather Forecast Date: 258 PM CDT Fri Sep 18 2026
The area/counties/county of: Union, including the city of Creston.or toggle through each period.
Tonight... Mostly sunny early, then partly cloudy with a slight chance of showers and thunderstorms this evening. Mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50%.
Saturday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms, mainly in the morning. Humid with highs in the lower 80s. Southwest winds around 10 mph, becoming west in the afternoon. Chance of rain 40%.
Saturday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers. Humid with lows in the lower 60s. North winds 5 to 10 mph. Chance of rain 50%.
Sunday... Cloudy with a slight chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Humid. Near steady temperature in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 60%.
Sunday Night... Cloudy with a 50% chance of showers. Lows in the upper 50s. Northeast winds around 10 mph with gusts up to 20 mph.
Monday... Showers likely, mainly in the morning. Near steady temperature in the upper 50s. Chance of rain 60%.
Monday Night... Mostly cloudy. A slight chance of showers in the evening. Lows in the lower 50s. Chance of rain 20%.
Tuesday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 50s.
Tuesday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 40s.
Wednesday... Mostly sunny. Highs in the lower 60s.
Wednesday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 50s.
Thursday... Mostly cloudy in the morning, then becoming partly sunny. A 20% chance of showers. Highs in the mid 60s.
Thursday Night... Mostly cloudy. A slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 20%.
POP = Probability of Precipitation
Union County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...