Grinnell, IA Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Grinnell, IA in one place.
A chance of showers and thunderstorms before 3pm. Mostly cloudy, with a high near 80. Southeast wind around 13 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Grinnell, 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: May 30, 2026 8:19 PM CDT.
The active forecast window currently covers May 31 to Jun 6, 2026 for Grinnell, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 31 to Jun 6, 2026
- Latest sync
- May 30, 2026 8:19 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grinnell
Saturday looks like the warmest upcoming period in Grinnell at 86 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Sunday at about 13 mph SE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 8:19 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
A slight chance of showers and thunderstorms before 2am, then a chance of showers and thunderstorms between 2am and 4am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 59, with temperatures rising to around 62 overnight. East southeast wind 3 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms. Partly sunny, with a high near 82. East wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 57. East northeast wind around 5 mph. Chance of precipitation is 20%.
Sunny, with a high near 82.
Partly cloudy, with a low around 55.
Sunny, with a high near 84.
Partly cloudy, with a low around 58.
A chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 31
|
Chance Showers And Thunderstorms
|
80°F |
13 mph
SE
|
|
Sunday Night
May 31
|
Slight Chance Showers And Thunderstorms
|
59°F |
3 to 10 mph
ESE
|
|
Monday
Jun 1
|
Chance Showers And Thunderstorms
|
82°F |
5 mph
E
|
|
Monday Night
Jun 1
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
57°F |
5 mph
ENE
|
|
Tuesday
Jun 2
|
Sunny
|
82°F |
5 to 8 mph
E
|
|
Tuesday Night
Jun 2
|
Partly Cloudy
|
55°F |
6 mph
ESE
|
|
Wednesday
Jun 3
|
Sunny
|
84°F |
5 to 8 mph
SSE
|
|
Wednesday Night
Jun 3
|
Partly Cloudy
|
58°F |
7 mph
S
|
|
Thursday
Jun 4
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
85°F |
8 to 12 mph
S
|
|
Thursday Night
Jun 4
|
Chance Showers And Thunderstorms
|
62°F |
7 to 10 mph
S
|
|
Friday
Jun 5
|
Chance Showers And Thunderstorms
|
85°F |
8 to 12 mph
SSW
|
|
Friday Night
Jun 5
|
Chance Showers And Thunderstorms
|
62°F |
5 to 9 mph
SW
|
|
Saturday
Jun 6
|
Chance Showers And Thunderstorms
|
86°F |
7 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grinnell.
