Missouri Valley, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Missouri Valley, a city in Harrison County, Iowa.
Today
77°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 9am, then a slight chance of showers and thunderstorms between 11am and 1pm. Partly sunny. High near 77, with temperatures falling to around 75 in the afternoon. North northwest wind 2 to 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Missouri Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Chance Showers And Thunderstorms | 2 to 8 mph NNW | 52% |
| Tonight | 61°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 9 mph N | 27% |
| Sunday | 64°F | Chance Rain Showers | 10 mph NNE | 39% |
| Sunday Night | 56°F | Chance Rain Showers | 8 mph NE | 37% |
| Monday | 60°F | Rain Showers Likely | 8 mph NE | 59% |
| Monday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 3 to 7 mph NE | 46% |
| Tuesday | 61°F | Partly Sunny | 6 mph ENE | 8% |
| Tuesday Night | 48°F | Partly Cloudy | 5 mph E | 1% |
| Wednesday | 65°F | Mostly Sunny | 5 mph SE | 2% |
| Wednesday Night | 53°F | Partly Cloudy then Chance Rain Showers | 3 mph SE | 28% |
| Thursday | 65°F | Chance Rain Showers | 6 mph SE | 31% |
| Thursday Night | 57°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph SE | 24% |
| Friday | 67°F | Slight Chance Showers And Thunderstorms | 3 to 7 mph SE | 24% |
| Friday Night | 58°F | Slight Chance Rain Showers | 6 mph SE | 20% |
Forecast source: National Weather Service (api.weather.gov) for Missouri Valley (41.559, -95.903). Updated through the day.
Growing snapshot for Missouri Valley
Last spring frost
Apr 29
First fall frost
Oct 8
Growing season
162 days
Hardiness zone
5b
More local growing data for Missouri Valley: nearby ZIP 51555 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
California Junction
Dunlap
Little Sioux
Logan
Loveland
Magnolia
Modale
Mondamin
Persia
Pisgah
River Sioux
Woodbine
Climate data from the nearest NOAA station, Logan, Ia (8.5 mi from Missouri Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.