Grimes, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Grimes, a city in Polk County, Iowa.

Tonight

46°F

Rain Showers

Rain showers before 3am. Cloudy. Low around 46, with temperatures rising to around 48 overnight. Northwest wind 9 to 14 mph, with gusts as high as 20 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
Tonight	46°F	Rain Showers	9 to 14 mph NW	76%
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%
Tuesday	63°F	Sunny	6 mph NNW	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

More local growing data for Grimes: nearby ZIP 50111 weather · frost dates · planting calendar · Iowa frost dates

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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 4, 2026.