Treynor, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Treynor, a city in Pottawattamie County, Iowa.
Today
81°F
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 81, with temperatures falling to around 78 in the afternoon. North northeast wind 5 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Treynor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 13 mph NNE | 51% |
| Tonight | 62°F | Chance Showers And Thunderstorms then Patchy Smoke | 8 to 14 mph NNE | 88% |
| Wednesday | 73°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 9 mph NE | 69% |
| Wednesday Night | 58°F | Partly Cloudy | 3 to 8 mph ENE | 12% |
| Thursday | 81°F | Mostly Sunny | 2 to 6 mph ESE | 1% |
| Thursday Night | 63°F | Mostly Clear | 6 mph SE | 6% |
| Friday | 85°F | Sunny | 6 to 10 mph S | 6% |
| Friday Night | 68°F | Mostly Clear | 9 mph SSE | 5% |
| Saturday | 90°F | Sunny | 6 to 15 mph S | 2% |
| Saturday Night | 72°F | Mostly Clear | 12 to 15 mph S | 9% |
| Sunday | 91°F | Mostly Sunny | 10 to 15 mph SSE | 7% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms | 15 mph SSE | 22% |
| Monday | 92°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 13 to 17 mph S | 16% |
| Monday Night | 73°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 12 to 17 mph SE | 24% |
Forecast source: National Weather Service (api.weather.gov) for Treynor (41.232, -95.606). Updated through the day.
Growing snapshot for Treynor
Last spring frost
Apr 23
First fall frost
Oct 14
Growing season
174 days
Hardiness zone
5b
More local growing data for Treynor: nearby ZIP 51575 weather · frost dates · planting calendar · Iowa frost dates
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Neola
Oakland
Underwood
Walnut
Weston
Climate data from the nearest NOAA station, Oakland, Ia (12.2 mi from Treynor). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.