Delta, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Delta, a city in Keokuk County, Iowa.
Tonight
69°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between midnight and 4am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 69, with temperatures rising to around 71 overnight. Southeast wind 5 to 10 mph. Chance of precipitation is 50%.
7-day forecast for Delta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SE | 52% |
| Saturday | 83°F | Showers And Thunderstorms Likely | 5 to 10 mph S | 56% |
| Saturday Night | 64°F | Showers And Thunderstorms | 5 mph N | 75% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 75% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 65% |
| Monday | 62°F | Rain Showers Likely | 15 mph NE | 59% |
| Monday Night | 52°F | Rain Showers Likely | 10 to 15 mph NE | 59% |
| Tuesday | 61°F | Chance Rain Showers then Mostly Cloudy | 10 mph NE | 26% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 65°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 68°F | Partly Sunny | 0 to 5 mph E | 8% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph E | 8% |
| Friday | 68°F | Mostly Sunny | 0 to 5 mph E | 10% |
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
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Sigourney
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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 Sep 19, 2026.