Treynor, IA Weather & Growing Conditions
This Afternoon
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms. Partly sunny. High near 80, with temperatures falling to around 77 in the afternoon. Northwest wind around 9 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Chance Showers And Thunderstorms | 9 mph NW | 25% |
| Tonight | 61°F | Chance Showers And Thunderstorms | 12 mph N | 41% |
| Sunday | 64°F | Cloudy then Chance Rain Showers | 13 mph NNE | 36% |
| Sunday Night | 57°F | Rain Showers Likely | 8 to 12 mph NE | 58% |
| Monday | 59°F | Rain Showers Likely | 12 mph NE | 70% |
| Monday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 7 to 10 mph NE | 42% |
| Tuesday | 60°F | Partly Sunny | 8 mph NE | 4% |
| Tuesday Night | 48°F | Partly Cloudy | 6 mph E | 2% |
| Wednesday | 63°F | Mostly Sunny | 7 mph ESE | 2% |
| Wednesday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph SE | 19% |
| Thursday | 66°F | Chance Rain Showers | 9 mph SSE | 34% |
| Thursday Night | 58°F | Slight Chance Rain Showers | 6 mph SE | 23% |
| Friday | 68°F | Slight Chance Rain Showers | 7 mph ESE | 21% |
| Friday Night | 60°F | Mostly Cloudy then Chance Rain Showers | 8 mph ESE | 27% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Treynor, IA
Last spring frost
Apr 23
First fall frost
Oct 14
Growing season
174 days
Hardiness zone
5b
Explore more for Treynor, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Oakland, Ia (12.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.