Montezuma, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Montezuma, a city in Poweshiek County, Iowa.
Overnight
68°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southeast wind around 9 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Montezuma
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Chance Showers And Thunderstorms | 9 mph SE | 53% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 8 mph SSW | 50% |
| Saturday Night | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph NNW | 60% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 9 to 13 mph NNE | 68% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 12 mph NE | 62% |
| Monday | 61°F | Rain Showers Likely | 13 mph ENE | 61% |
| Monday Night | 51°F | Rain Showers Likely | 8 to 12 mph NE | 61% |
| Tuesday | 60°F | Slight Chance Rain Showers | 9 mph NE | 22% |
| Tuesday Night | 47°F | Partly Cloudy | 3 to 7 mph NE | 5% |
| Wednesday | 64°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 2 mph ENE | 3% |
| Thursday | 67°F | Partly Sunny | 3 mph E | 10% |
| Thursday Night | 53°F | Partly Cloudy | 2 mph E | 8% |
| Friday | 67°F | Mostly Sunny | 5 mph E | 10% |
Forecast source: National Weather Service (api.weather.gov) for Montezuma (41.583, -92.528). Updated through the day.
Growing snapshot for Montezuma
Last spring frost
May 3
First fall frost
Oct 6
Growing season
155 days
Hardiness zone
5b
More local growing data for Montezuma: nearby ZIP 50171 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Grinnell 3 Sw, Ia (14.9 mi from Montezuma). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.