Parnell, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Parnell, a city in Iowa County, Iowa.
Overnight
64°F
Partly Cloudy
Partly cloudy, with a low around 64. South wind around 5 mph.
7-day forecast for Parnell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Partly Cloudy | 5 mph S | 0% |
| Tuesday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 23% |
| Tuesday Night | 64°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 84% |
| Wednesday | 76°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph NE | 75% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 5 mph NE | 49% |
| Thursday | 81°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 25% |
| Thursday Night | 60°F | Mostly Clear | 0 to 5 mph E | 2% |
| Friday | 84°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Mostly Clear | 5 mph S | 13% |
| Saturday | 87°F | Mostly Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 71°F | Mostly Clear | 10 mph S | 12% |
| Sunday | 88°F | Mostly Sunny | 10 mph S | 12% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 10 mph S | 34% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 34% |
Forecast source: National Weather Service (api.weather.gov) for Parnell (41.584, -92.004). Updated through the day.
Growing snapshot for Parnell
Last spring frost
Apr 28
First fall frost
Oct 9
Growing season
164 days
Hardiness zone
5b
More local growing data for Parnell: nearby ZIP 52361 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Amana
Conroy
East Amana
High Amana
Homestead
Ladora
Marengo
Middle Amana
Millersburg
North English
South Amana
Victor
West Amana
Williamsburg
Climate data from the nearest NOAA station, Williamsburg 1E, Ia (1.9 mi from Parnell). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.