Underwood, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Underwood, a city in Pottawattamie County, Iowa.
Overnight
70°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. Low around 70, with temperatures rising to around 72 overnight. Southeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Underwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Showers And Thunderstorms Likely | 6 mph SE | 55% |
| Saturday | 79°F | Chance Showers And Thunderstorms | 3 to 9 mph NNE | 51% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 8 to 12 mph N | 41% |
| Sunday | 64°F | Chance Rain Showers | 12 mph NE | 36% |
| Sunday Night | 56°F | Chance Rain Showers | 8 to 12 mph NE | 36% |
| Monday | 60°F | Rain Showers Likely | 12 mph NE | 58% |
| Monday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 6 to 10 mph NE | 50% |
| Tuesday | 61°F | Partly Sunny | 8 mph ENE | 3% |
| Tuesday Night | 47°F | Partly Cloudy | 3 to 7 mph E | 1% |
| Wednesday | 64°F | Mostly Sunny | 6 mph ESE | 2% |
| Wednesday Night | 52°F | Partly Cloudy then Chance Rain Showers | 5 mph SE | 25% |
| Thursday | 65°F | Chance Rain Showers | 7 mph SE | 30% |
| Thursday Night | 56°F | Slight Chance Rain Showers | 6 mph SE | 24% |
| Friday | 66°F | Slight Chance Rain Showers | 5 to 8 mph SE | 24% |
Forecast source: National Weather Service (api.weather.gov) for Underwood (41.380, -95.683). Updated through the day.
Growing snapshot for Underwood
Last spring frost
Apr 18
First fall frost
Oct 21
Growing season
185 days
Hardiness zone
5b
More local growing data for Underwood: nearby ZIP 51576 weather · frost dates · planting calendar · Iowa frost dates
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Neola
Oakland
Treynor
Walnut
Weston
Climate data from the nearest NOAA station, Omaha Eppley Airfield, Ne (10.8 mi from Underwood). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.