Ainsworth, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ainsworth, a city in Washington County, Iowa.
Tonight
69°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 1am and 4am, then showers and thunderstorms likely between 4am and 5am, 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, with gusts as high as 20 mph. Chance of precipitation is 60%.
7-day forecast for Ainsworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SE | 57% |
| Saturday | 84°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph S | 64% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph NW | 81% |
| Sunday | 72°F | Showers And Thunderstorms | 5 to 15 mph NE | 75% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 64% |
| Monday | 64°F | Rain Showers Likely | 15 mph NE | 62% |
| Monday Night | 53°F | Rain Showers Likely | 10 to 15 mph NE | 59% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 69°F | Partly Sunny | 5 mph NE | 10% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Ainsworth (41.290, -91.554). Updated through the day.
Growing snapshot for Ainsworth
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
165 days
Hardiness zone
5b
More local growing data for Ainsworth: nearby ZIP 52201 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Washington, Ia (9 mi from Ainsworth). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.