Delta, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delta, a city in Keokuk County, Iowa.
This Afternoon
70°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 70, with temperatures falling to around 65 in the afternoon. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
7-day forecast for Delta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Showers And Thunderstorms | 10 to 15 mph S | 80% |
| Tonight | 48°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph SW | 29% |
| Wednesday | 54°F | Slight Chance Rain Showers | 15 mph W | 24% |
| Wednesday Night | 43°F | Mostly Cloudy | 10 to 15 mph W | 7% |
| Thursday | 53°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 | 52°F | Partly Sunny | 5 to 10 mph N | 6% |
| Friday Night | 33°F | Mostly Cloudy | 0 to 5 mph NW | 1% |
| Saturday | 54°F | Mostly Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 58°F | Sunny | 5 mph W | 3% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 1% |
| Monday | 64°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) for Delta (41.323, -92.331). Updated through the day.
Growing snapshot for Delta
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
172 days
Hardiness zone
5b
More local growing data for Delta: nearby ZIP 52550 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Gibson
Harper
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Ollie
Richland
Sigourney
South English
Thornburg
Webster
What Cheer
Climate data from the nearest NOAA station, Sigourney, Ia (6.9 mi from Delta). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.