Grant City, IA Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Grant City, IA in one place.
A slight chance of rain showers before 1pm. Mostly cloudy, with a high near 72. North wind 3 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Grant City, 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: Sep 15, 2026 1:26 PM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Grant City, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 1:26 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grant City
Friday looks like the warmest upcoming period in Grant City at 82 degrees F.
Monday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Friday at about 8 to 13 mph SE.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 1:26 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
Mostly cloudy. Low around 54, with temperatures rising to around 56 overnight. Northeast wind 1 to 5 mph.
A chance of rain showers before 4pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 70, with temperatures falling to around 67 in the afternoon. East wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 4am, then a chance of showers and thunderstorms. Cloudy. Low around 60, with temperatures rising to around 63 overnight. South southeast wind 1 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely. Mostly cloudy, with a high near 79. North northeast wind 0 to 3 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a high near 78. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 70.
A slight chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 52.
Partly sunny, with a high near 70.
Partly cloudy, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Sep 15
|
Slight Chance Rain Showers
|
72°F |
3 to 10 mph
N
|
|
Tonight
Sep 15
|
Mostly Cloudy
|
54°F |
1 to 5 mph
NE
|
|
Wednesday
Sep 16
|
Chance Rain Showers
|
70°F |
5 to 8 mph
E
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
60°F |
1 to 5 mph
SSE
|
|
Thursday
Sep 17
|
Showers And Thunderstorms Likely
|
79°F |
0 to 3 mph
NNE
|
|
Thursday Night
Sep 17
|
Chance Showers And Thunderstorms
|
62°F |
3 to 8 mph
E
|
|
Friday
Sep 18
|
Showers And Thunderstorms
|
82°F |
8 to 13 mph
SE
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
65°F |
10 mph
SSW
|
|
Saturday
Sep 19
|
Showers And Thunderstorms
|
78°F |
8 mph
WNW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
57°F |
3 to 7 mph
N
|
|
Sunday
Sep 20
|
Slight Chance Showers And Thunderstorms
|
70°F |
3 to 7 mph
N
|
|
Sunday Night
Sep 20
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
52°F |
5 mph
NE
|
|
Monday
Sep 21
|
Partly Sunny
|
70°F |
5 mph
NE
|
|
Monday Night
Sep 21
|
Partly Cloudy
|
50°F |
2 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grant City.