Treynor, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Treynor, a city in Pottawattamie County, Iowa.
This Afternoon
59°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 59, with temperatures falling to around 54 in the afternoon. North northwest wind around 22 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Treynor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Rain Showers Likely | 22 mph NNW | 72% |
| Tonight | 43°F | Rain Showers Likely then Cloudy | 15 to 22 mph NW | 63% |
| Wednesday | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 13 to 17 mph WNW | 19% |
| Wednesday Night | 41°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph WNW | 23% |
| Thursday | 51°F | Chance Rain Showers | 13 mph NW | 33% |
| Thursday Night | 38°F | Mostly Cloudy | 7 to 10 mph NNW | 5% |
| Friday | 52°F | Partly Sunny | 2 to 7 mph N | 3% |
| Friday Night | 35°F | Mostly Cloudy | 3 mph ESE | 0% |
| Saturday | 57°F | Mostly Sunny | 6 mph SW | 3% |
| Saturday Night | 38°F | Mostly Clear | 5 mph W | 5% |
| Sunday | 61°F | Sunny | 6 mph WSW | 4% |
| Sunday Night | 41°F | Mostly Clear | 8 mph SSW | 0% |
| Monday | 65°F | Sunny | 8 to 12 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 7 mph NW | 0% |
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
Nearby towns & communities
Avoca
Bentley
Carson
Carter Lake
Council Bluffs
Crescent
Hancock
Macedonia
McClelland
Minden
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 Nov 3, 2026.