Grinnell, IA Weather Forecast
Local 7-day forecast
Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Grinnell, IA in one place.
Rain showers before 1pm, then showers and thunderstorms. Cloudy. High near 64, with temperatures falling to around 61 in the afternoon. Northeast wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters 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: Oct 13, 2026 11:20 PM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Grinnell, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 11:20 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grinnell
Tuesday looks like the warmest upcoming period in Grinnell at 73 degrees F.
Friday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Friday at about 12 to 21 mph NNW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 11:20 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
Rain showers before 7pm. Mostly cloudy, with a low around 43. North northwest wind 12 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 56.
Areas of frost after 2am. Clear, with a low around 32.
Areas of frost before 9am. Sunny, with a high near 61.
Clear, with a low around 41.
Sunny, with a high near 66.
Mostly cloudy, with a low around 48.
Partly sunny, with a high near 69.
Partly cloudy, with a low around 49.
Mostly sunny, with a high near 73.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Rain Showers
|
64°F |
7 to 10 mph
NE
|
|
Thursday Night
Oct 15
|
Rain Showers then Mostly Cloudy
|
43°F |
12 to 17 mph
NNW
|
|
Friday
Oct 16
|
Mostly Sunny
|
56°F |
12 to 21 mph
NNW
|
|
Friday Night
Oct 16
|
Clear then Areas Of Frost
|
32°F |
0 to 8 mph
NNW
|
|
Saturday
Oct 17
|
Areas Of Frost then Sunny
|
61°F |
0 to 10 mph
SSW
|
|
Saturday Night
Oct 17
|
Clear
|
41°F |
9 mph
SSW
|
|
Sunday
Oct 18
|
Sunny
|
66°F |
10 to 14 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Cloudy
|
48°F |
5 to 10 mph
SSW
|
|
Monday
Oct 19
|
Partly Sunny
|
69°F |
3 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
49°F |
2 mph
SE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
73°F |
3 to 8 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grinnell.
