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 78. South southwest wind 7 to 17 mph, with gusts as high as 24 mph.
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: Apr 21, 2026 12:27 PM CDT.
The active forecast window currently covers Apr 22 to Apr 27, 2026 for Diagonal, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 27, 2026
- Latest sync
- Apr 21, 2026 12:27 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Diagonal
Wednesday looks like the warmest upcoming period in Diagonal at 78 degrees F.
Friday Night is the coolest period ahead with temperatures near 43 degrees F.
The strongest winds are forecast for Thursday at about 17 to 24 mph S.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 21, 2026 12:27 PM CDT
- Coverage
- 6 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, with a low around 59. South wind 14 to 17 mph, with gusts as high as 24 mph.
Showers and thunderstorms likely after 7am. Mostly cloudy, with a high near 75. South wind 17 to 24 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 48. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
A chance of rain showers before 1pm. Mostly sunny, with a high near 67. Chance of precipitation is 40%.
Partly cloudy, with a low around 43.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 65.
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 62. Chance of precipitation is 40%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
A chance of rain showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Mostly cloudy, with a low around 43.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Mostly Sunny
|
78°F |
7 to 17 mph
SSW
|
|
Wednesday Night
Apr 22
|
Partly Cloudy
|
59°F |
14 to 17 mph
S
|
|
Thursday
Apr 23
|
Showers And Thunderstorms Likely
|
75°F |
17 to 24 mph
S
|
|
Thursday Night
Apr 23
|
Showers And Thunderstorms
|
48°F |
9 to 21 mph
WSW
|
|
Friday
Apr 24
|
Chance Rain Showers
|
67°F |
14 mph
NNW
|
|
Friday Night
Apr 24
|
Partly Cloudy
|
43°F |
6 to 10 mph
N
|
|
Saturday
Apr 25
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
65°F |
6 to 12 mph
NE
|
|
Saturday Night
Apr 25
|
Slight Chance Showers And Thunderstorms
|
43°F |
6 to 10 mph
NE
|
|
Sunday
Apr 26
|
Chance Showers And Thunderstorms
|
62°F |
7 to 14 mph
ENE
|
|
Sunday Night
Apr 26
|
Showers And Thunderstorms Likely
|
47°F |
9 to 13 mph
E
|
|
Monday
Apr 27
|
Showers And Thunderstorms Likely
|
63°F |
10 to 16 mph
NE
|
|
Monday Night
Apr 27
|
Chance Showers And Thunderstorms
|
43°F |
8 to 15 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Diagonal.