Ainsworth, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ainsworth, a city in Washington County, Iowa.
Today
88°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 4pm. Mostly sunny. High near 88, with temperatures falling to around 86 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Ainsworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 28% |
| Tonight | 67°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 72% |
| Wednesday | 78°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph NE | 81% |
| Wednesday Night | 61°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 64% |
| Thursday | 81°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph NE | 42% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph E | 4% |
| Friday | 83°F | Sunny | 0 to 5 mph SE | 4% |
| Friday Night | 66°F | Mostly Clear | 5 mph SE | 13% |
| Saturday | 87°F | Sunny | 5 mph S | 11% |
| Saturday Night | 71°F | Mostly Clear | 10 mph S | 10% |
| Sunday | 88°F | Sunny | 10 to 15 mph S | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph S | 30% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 30% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 31% |
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 Aug 4, 2026.