Grimes, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grimes, a city in Polk County, Iowa.
Today
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 80, with temperatures falling to around 78 in the afternoon. West wind 3 to 8 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Grimes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 50% |
| Tonight | 62°F | Chance Showers And Thunderstorms | 9 mph N | 38% |
| Sunday | 65°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 13 mph NNE | 38% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 12 mph NE | 59% |
| Monday | 60°F | Rain Showers Likely | 12 mph NE | 57% |
| Monday Night | 52°F | Rain Showers Likely | 7 to 10 mph NE | 55% |
| Tuesday | 59°F | Partly Sunny | 8 mph ENE | 10% |
| Tuesday Night | 47°F | Partly Cloudy | 3 to 7 mph ENE | 2% |
| Wednesday | 64°F | Sunny | 5 mph ENE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph E | 5% |
| Thursday | 65°F | Slight Chance Rain Showers | 5 mph ESE | 22% |
| Thursday Night | 56°F | Mostly Cloudy | 3 mph ESE | 8% |
| Friday | 67°F | Partly Sunny | 6 mph ESE | 8% |
| Friday Night | 57°F | Mostly Cloudy | 5 mph ESE | 9% |
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 Sep 19, 2026.