Grimes, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grimes, a city in Polk County, Iowa.
Today
82°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 79 in the afternoon. West northwest wind 6 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Grimes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Chance Showers And Thunderstorms | 6 to 10 mph WNW | 32% |
| Tonight | 62°F | Showers And Thunderstorms | 7 to 10 mph NNE | 89% |
| Wednesday | 72°F | Showers And Thunderstorms Likely | 7 mph NE | 56% |
| Wednesday Night | 57°F | Chance Rain Showers | 5 mph NE | 25% |
| Thursday | 79°F | Sunny | 5 mph ENE | 3% |
| Thursday Night | 61°F | Mostly Clear | 3 mph SE | 4% |
| Friday | 84°F | Sunny | 2 to 8 mph S | 5% |
| Friday Night | 67°F | Mostly Clear | 7 mph S | 12% |
| Saturday | 88°F | Sunny | 3 to 10 mph S | 10% |
| Saturday Night | 72°F | Mostly Clear | 12 mph SSW | 11% |
| Sunday | 88°F | Mostly Sunny | 12 mph S | 11% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph SSE | 28% |
| Monday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 9 to 14 mph S | 28% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 10 to 14 mph SE | 24% |
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 Aug 4, 2026.