City of Grinnell Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for City of Grinnell in one place.
A chance of showers and thunderstorms. Mostly cloudy, with a high near 72. East wind 6 to 9 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for City of Grinnell 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: Sep 15, 2026 12:54 PM CDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for City of Grinnell.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 12:54 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in City of Grinnell
Friday looks like the warmest upcoming period in City of Grinnell at 81 degrees F.
Monday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Friday at about 12 mph SE.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 12:54 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
A chance of rain showers before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers and thunderstorms. Mostly cloudy. Low around 62, with temperatures rising to around 65 overnight. East wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 79. North northeast wind 0 to 3 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 70%.
A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Partly cloudy, with a low around 65. Chance of precipitation is 70%.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 70%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly sunny, with a high near 71. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 70.
Partly cloudy, with a low around 51.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Chance Showers And Thunderstorms
|
72°F |
6 to 9 mph
E
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
62°F |
0 to 5 mph
E
|
|
Thursday
Sep 17
|
Showers And Thunderstorms
|
79°F |
0 to 3 mph
NNE
|
|
Thursday Night
Sep 17
|
Chance Showers And Thunderstorms
|
63°F |
3 to 8 mph
ENE
|
|
Friday
Sep 18
|
Showers And Thunderstorms Likely
|
81°F |
12 mph
SE
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
65°F |
12 mph
S
|
|
Saturday
Sep 19
|
Showers And Thunderstorms Likely
|
79°F |
10 mph
WSW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
59°F |
8 mph
NNW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
71°F |
8 mph
NNE
|
|
Sunday Night
Sep 20
|
Slight Chance Showers And Thunderstorms
|
54°F |
7 mph
NNE
|
|
Monday
Sep 21
|
Slight Chance Rain Showers then Mostly Sunny
|
70°F |
7 mph
NE
|
|
Monday Night
Sep 21
|
Partly Cloudy
|
51°F |
5 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around City of Grinnell.