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Union, IA 50258 Weather

Tonight: Chance Showers And Thunderstorms, low 50°F. Hourly and 10-day forecast from the National Weather Service. Times are local (CDT).

Union, IA 50258 current weather

62°F

Chance Showers And Thunderstorms

Forecast for this hour. No recent report from a nearby station.

H -- / L 50°

No recent station report. NWS hourly forecast updated 10/28/2026, 9:31 PM PT

Hourly forecast

NWS, updated 10/28/2026, 9:31 PM PT

  1. Now62°47%
  2. 12 AM62°32%Thu
  3. 1 AM62°14%
  4. 2 AM62°
  5. 3 AM61°
  6. 4 AM59°
  7. 5 AM56°
  8. 6 AM54°
  9. 7 AM52°
  10. 8 AM50°
  11. 9 AM52°
  12. 10 AM56°
  13. 11 AM59°
  14. 12 PM61°
  15. 1 PM63°
  16. 2 PM64°
  17. 3 PM64°
  18. 4 PM65°
  19. 5 PM63°
  20. 6 PM61°
  21. 7 PM57°
  22. 8 PM52°
  23. 9 PM50°
  24. 10 PM48°
  25. 11 PM47°
  26. 12 AM46°Fri
  27. 1 AM45°
  28. 2 AM45°
  29. 3 AM44°
  30. 4 AM44°
  31. 5 AM43°
  32. 6 AM44°
  33. 7 AM44°19%
  34. 8 AM42°48%
  35. 9 AM45°51%
  36. 10 AM50°34%
  37. 11 AM52°42%
  38. 12 PM54°26%
  39. 1 PM55°40%
  40. 2 PM56°50%
  41. 3 PM57°54%
  42. 4 PM58°75%
  43. 5 PM57°75%
  44. 6 PM56°75%
  45. 7 PM55°55%
  46. 8 PM54°55%
  47. 9 PM53°55%
  48. 10 PM52°55%

10-day forecast

Tap a day for details

  • Today10/2847% chance of precipitationLow 50°High

    Tonight: A chance of showers and thunderstorms before 1am. Mostly cloudy. Low around 50, with temperatures rising to around 56 overnight. North northwest wind 0 to 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

    Chance Showers And Thunderstorms
  • Thu10/29Low 41°High 66°

    Thursday: Sunny. High near 66, with temperatures falling to around 63 in the afternoon. North northeast wind 5 to 8 mph.

    Thursday Night: Mostly clear. Low around 41, with temperatures rising to around 43 overnight. East northeast wind around 3 mph. New rainfall amounts less than a tenth of an inch possible.

    Sunny
  • Fri10/3081% chance of precipitationLow 47°High 59°

    Friday: A chance of rain showers between 7am and 10am, then showers and thunderstorms. Mostly cloudy. High near 59, with temperatures falling to around 57 in the afternoon. East wind 5 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Friday Night: Showers and thunderstorms. Cloudy, with a low around 47. East wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

    Showers And Thunderstorms
  • Sat10/3181% chance of precipitationLow 50°High 66°

    Saturday: Showers and thunderstorms. Cloudy, with a high near 66. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.

    Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.

    Showers And Thunderstorms
  • Sun11/117% chance of precipitationLow 52°High 67°

    Sunday: A slight chance of rain showers before noon. Mostly cloudy, with a high near 67. Chance of precipitation is 20%.

    Sunday Night: A slight chance of rain showers after midnight. Mostly cloudy, with a low around 52.

    Slight Chance Rain Showers then Mostly Cloudy
  • Mon11/275% chance of precipitationLow 55°High 66°

    Monday: Rain showers likely. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    Monday Night: Rain showers. Mostly cloudy, with a low around 55. Chance of precipitation is 80%.

    Rain Showers Likely
  • Tue11/377% chance of precipitationLow 49°High 67°

    Tuesday: Rain showers. Cloudy, with a high near 67. Chance of precipitation is 80%.

    Tuesday Night: A chance of rain showers. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.

    Rain Showers
  • Wed11/443% chance of precipitationLow High 62°

    Wednesday: A chance of rain showers. Mostly cloudy, with a high near 62.

    Chance Rain Showers
  • Thu11/5Model blend18% chance of precipitationLow 38°High 59°

    Thursday: Mostly cloudy, slight chance of rain. High near 59°. Low that night near 38°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Fri11/6Model blend17% chance of precipitationLow 37°High 58°

    Friday: Partly cloudy, slight chance of rain. High near 58°. Low that night near 37°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 42.220, -93.079 from the NWS DMX office, updated 10/28/2026, 9:31 PM PT · Official forecast on weather.gov

Days 9 to 10: NOAA National Blend of Models, station KMIW (Marshalltown Muni, 11 mi), model run 10/28/2026, 9:00 PM CDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now62°Chance Showers And Thunderstorms47%0 mph
  2. 12 AM62°Chance Showers And Thunderstorms32%5 mph
  3. 1 AM62°Mostly Cloudy14%7 mph
  4. 2 AM62°Mostly Cloudy7%7 mph
  5. 3 AM61°Mostly Cloudy3%8 mph
  6. 4 AM59°Mostly Cloudy3%8 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

Will it rain in Union, IA 50258 in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Union, IA 50258?
The first 8 days come from the National Weather Service forecast. Days 9 to 10 (Nov 5 to Nov 6) come from the NOAA National Blend of Models, with highs of 58°F to 59°F. Model guidance this far out often changes.
What time is sunrise and sunset in Union, IA 50258 today?
Sunrise is about 7:40 AM CDT and sunset is about 6:11 PM CDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Union, IA 50258?
At Eldora, the 1991 to 2020 normal high in October is 62°F and the normal low is 38°F.

Nearby hazards

Iowa hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:General thunderstormsOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: None reported

UV and air quality forecast

EPA and AirNow

AQI forecast tomorrow (North-central Iowa)
43GoodOzone
AQI forecast tomorrow (North-central Iowa)
31GoodOzone

UV index guide · Air quality

Drought

By county

Hardin County, week of 10/20/2026

No drought or abnormal dryness in this county.

Sun and moon

Local time, center of the area

Sunrise
7:40 AM
Sunset
6:11 PM
Daylight
10 hr 30 min
Moon
Waning Gibbous 90% lit
First light (civil dawn)
7:11 AM
Last light (civil dusk)
6:40 PM
Moonrise
7:32 PM
Moonset
10:52 AM

Normal October weather

Climate

Normal October high 62°, low 38°, precipitation 2.80 in for the month. 1991 to 2020 normals at Eldora, 10 mi away.

Other places nearby

Data sources

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About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

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