Delta, IA Weather & Growing Conditions
Today
88°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny. High near 88, with temperatures falling to around 86 in the afternoon. West wind around 5 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph W | 35% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 84% |
| Wednesday | 78°F | Showers And Thunderstorms | 5 mph NE | 80% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 55% |
| Thursday | 82°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 30% |
| Thursday Night | 61°F | Mostly Clear | 0 to 5 mph E | 2% |
| Friday | 86°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 mph SE | 16% |
| Saturday | 90°F | Sunny then Slight Chance Rain Showers | 5 to 10 mph S | 15% |
| Saturday Night | 71°F | Slight Chance Rain Showers then Mostly Clear | 10 mph S | 15% |
| Sunday | 91°F | Sunny | 10 to 15 mph S | 11% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph S | 30% |
| Monday | 91°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 30% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 30% |
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 Aug 4, 2026.