Delta, IA Weather & Growing Conditions
This Afternoon
71°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 71, with temperatures falling to around 66 in the afternoon. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Showers And Thunderstorms Likely | 10 mph S | 62% |
| Tonight | 48°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph SW | 27% |
| Wednesday | 54°F | Slight Chance Rain Showers | 15 mph W | 23% |
| Wednesday Night | 43°F | Mostly Cloudy | 10 to 15 mph W | 7% |
| Thursday | 54°F | Mostly Cloudy then Chance Rain Showers | 10 mph W | 40% |
| Thursday Night | 40°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 27% |
| Friday | 53°F | Partly Sunny | 5 to 10 mph N | 6% |
| Friday Night | 33°F | Mostly Cloudy | 0 to 5 mph NW | 1% |
| Saturday | 55°F | Partly Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 36°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 61°F | Sunny | 5 mph W | 6% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 2% |
| Monday | 65°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
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 Nov 4, 2026.