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
78°F
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A slight chance of showers and thunderstorms before 11am, then showers and thunderstorms likely between 11am and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 78, with temperatures falling to around 76 in the afternoon. North wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Missouri Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 9 to 13 mph N | 55% |
| Tonight | 61°F | Chance Showers And Thunderstorms then Patchy Smoke | 3 to 12 mph NNE | 67% |
| Wednesday | 74°F | Patchy Smoke | 6 mph ENE | 49% |
| Wednesday Night | 56°F | Mostly Clear | 1 to 5 mph ESE | 2% |
| Thursday | 81°F | Mostly Sunny | 1 to 6 mph ESE | 0% |
| Thursday Night | 63°F | Mostly Clear | 5 mph SSE | 4% |
| Friday | 86°F | Sunny | 5 to 9 mph S | 4% |
| Friday Night | 69°F | Mostly Clear | 7 mph SSE | 5% |
| Saturday | 91°F | Sunny | 3 to 14 mph S | 2% |
| Saturday Night | 72°F | Mostly Clear | 10 to 14 mph S | 9% |
| Sunday | 92°F | Mostly Sunny | 8 to 13 mph SSE | 6% |
| Sunday Night | 73°F | Slight Chance Showers And Thunderstorms | 14 mph SSE | 21% |
| Monday | 93°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 18% |
| Monday Night | 73°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 9 to 14 mph SE | 21% |
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 Aug 4, 2026.