Grimes, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grimes, a city in Polk County, Iowa.
This Afternoon
65°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 65, with temperatures falling to around 60 in the afternoon. North northwest wind 5 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Grimes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Showers And Thunderstorms | 5 to 9 mph NNW | 82% |
| Tonight | 46°F | Showers And Thunderstorms Likely | 9 to 14 mph NW | 73% |
| Wednesday | 52°F | Slight Chance Rain Showers | 16 mph W | 20% |
| Wednesday Night | 43°F | Mostly Cloudy then Chance Rain Showers | 13 mph W | 26% |
| Thursday | 51°F | Rain Showers Likely | 12 mph NW | 58% |
| Thursday Night | 40°F | Mostly Cloudy | 9 mph NNW | 9% |
| Friday | 51°F | Partly Sunny | 3 to 8 mph N | 2% |
| Friday Night | 34°F | Mostly Cloudy | 3 mph ENE | 0% |
| Saturday | 56°F | Mostly Sunny | 1 to 5 mph WSW | 1% |
| Saturday Night | 38°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 62°F | Sunny | 6 mph W | 5% |
| Sunday Night | 40°F | Mostly Clear | 6 mph SW | 2% |
| Monday | 65°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 6 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Grimes (41.678, -93.802). Updated through the day.
Growing snapshot for Grimes
Last spring frost
Apr 19
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
5b
More local growing data for Grimes: nearby ZIP 50111 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Alleman
Altoona
Ankeny
Bondurant
Clive
Des Moines
Elkhart
Granger
Johnston
Maxwell
Mitchellville
Pleasant Hill
Polk City
Runnells
Saylorville
Sheldahl
Slater
Urbandale
West Des Moines
Windsor Heights
Climate data from the nearest NOAA station, Des Moines Wsfo-Johnston, Ia (5.1 mi from Grimes). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.