Diagonal, IA Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Diagonal, IA in one place.
Mostly sunny, with a high near 90. Heat index values as high as 102. South southeast wind 3 to 16 mph, with gusts as high as 24 mph. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Diagonal, 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: Jun 8, 2026 10:39 PM CDT.
The active forecast window currently covers Jun 9 to Jun 15, 2026 for Diagonal, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 9 to Jun 15, 2026
- Latest sync
- Jun 8, 2026 10:39 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Diagonal
Tuesday looks like the warmest upcoming period in Diagonal at 90 degrees F.
Sunday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Wednesday at about 16 to 23 mph SSW.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 10:39 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
Partly cloudy. Low around 73, with temperatures rising to around 75 overnight. South wind around 16 mph, with gusts as high as 25 mph.
Showers and thunderstorms likely after 1pm. Mostly sunny, with a high near 89. South southwest wind 16 to 23 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Partly cloudy, with a low around 66. South southwest wind 5 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 58. Chance of precipitation is 40%.
Sunny, with a high near 83.
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 62.
A chance of showers and thunderstorms. Sunny, with a high near 84. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
A slight chance of rain showers before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Mostly cloudy, with a low around 57.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jun 9
|
Mostly Sunny
|
90°F |
3 to 16 mph
SSE
|
|
Tuesday Night
Jun 9
|
Partly Cloudy
|
73°F |
16 mph
S
|
|
Wednesday
Jun 10
|
Mostly Sunny then Showers And Thunderstorms Likely
|
89°F |
16 to 23 mph
SSW
|
|
Wednesday Night
Jun 10
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
66°F |
5 to 15 mph
SSW
|
|
Thursday
Jun 11
|
Showers And Thunderstorms Likely
|
82°F |
6 to 17 mph
SW
|
|
Thursday Night
Jun 11
|
Chance Showers And Thunderstorms then Mostly Clear
|
58°F |
3 to 13 mph
NW
|
|
Friday
Jun 12
|
Sunny
|
83°F |
5 to 10 mph
W
|
|
Friday Night
Jun 12
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
62°F |
7 mph
SW
|
|
Saturday
Jun 13
|
Chance Showers And Thunderstorms
|
84°F |
5 to 10 mph
W
|
|
Saturday Night
Jun 13
|
Chance Showers And Thunderstorms
|
60°F |
6 to 9 mph
N
|
|
Sunday
Jun 14
|
Chance Showers And Thunderstorms
|
78°F |
6 to 12 mph
NNE
|
|
Sunday Night
Jun 14
|
Slight Chance Showers And Thunderstorms
|
57°F |
5 to 10 mph
ESE
|
|
Monday
Jun 15
|
Slight Chance Rain Showers
|
76°F |
6 to 12 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Diagonal.