Delta, IA Weather & Growing Conditions
Today
83°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 5 to 10 mph. Chance of precipitation is 70%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Showers And Thunderstorms Likely | 5 to 10 mph S | 69% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NW | 79% |
| Sunday | 69°F | Showers And Thunderstorms | 10 to 15 mph NE | 76% |
| Sunday Night | 57°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 to 15 mph NE | 60% |
| Monday | 63°F | Rain Showers Likely | 15 mph NE | 60% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 48% |
| Tuesday | 61°F | Chance Rain Showers then Partly Sunny | 10 mph NE | 37% |
| Tuesday Night | 47°F | Mostly Clear | 5 to 10 mph NE | 3% |
| Wednesday | 66°F | Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 67°F | Partly Sunny | 5 mph E | 8% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph E | 6% |
| Friday | 70°F | Partly Sunny | 5 mph E | 5% |
| Friday Night | 55°F | Partly Cloudy | 5 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Delta, IA
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
172 days
Hardiness zone
5b
Explore more for Delta, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Sigourney, Ia (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.