Union, IA Weather Forecast
Local 7-day forecast
Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Union, IA in one place.
Rain showers. Cloudy. High near 60, with temperatures falling to around 55 in the afternoon. Northwest wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Union, IA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 6:14 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Union, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 6:14 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Union
Wednesday looks like the warmest upcoming period in Union at 73 degrees F.
Friday Night is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Friday at about 17 to 25 mph NNW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 6:14 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DMX
- Radar station
- KDMX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain showers likely before 10pm. Mostly cloudy. Low around 42, with temperatures rising to around 44 overnight. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
A slight chance of rain showers between 7am and 10am. Mostly cloudy, with a high near 51. North northwest wind 17 to 25 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.
Widespread frost after 11pm. Mostly clear, with a low around 30. Northwest wind 0 to 14 mph, with gusts as high as 23 mph.
Widespread frost before 9am. Sunny, with a high near 57. Southwest wind 1 to 13 mph.
Clear, with a low around 39.
Sunny, with a high near 65.
Mostly clear, with a low around 43.
Mostly sunny, with a high near 67.
Partly cloudy, with a low around 45.
Mostly sunny, with a high near 71.
Mostly clear, with a low around 50.
Sunny, with a high near 73.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Rain Showers
|
60°F |
16 mph
NW
|
|
Tonight
Oct 15
|
Rain Showers Likely then Mostly Cloudy
|
42°F |
15 to 18 mph
NW
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Mostly Cloudy
|
51°F |
17 to 25 mph
NNW
|
|
Friday Night
Oct 16
|
Widespread Frost
|
30°F |
0 to 14 mph
NW
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
57°F |
1 to 13 mph
SW
|
|
Saturday Night
Oct 17
|
Clear
|
39°F |
9 mph
SSW
|
|
Sunday
Oct 18
|
Sunny
|
65°F |
10 to 16 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
43°F |
3 to 12 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
67°F |
6 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
45°F |
1 to 5 mph
SSE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
71°F |
1 to 7 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
50°F |
6 mph
SE
|
|
Wednesday
Oct 21
|
Sunny
|
73°F |
3 to 10 mph
SSE
|
|
Wednesday Night
Oct 21
|
Partly Cloudy then Slight Chance Rain Showers
|
54°F |
8 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Union.