Pleasant Plain, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pleasant Plain, a city in Jefferson 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 Pleasant Plain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 61% |
| Wednesday | 78°F | Showers And Thunderstorms | 5 mph NE | 79% |
| Wednesday Night | 60°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 62% |
| Thursday | 81°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph NE | 45% |
| Thursday Night | 61°F | Mostly Clear | 0 to 5 mph NE | 4% |
| Friday | 84°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph SE | 15% |
| Saturday | 87°F | Sunny | 5 mph S | 14% |
| Saturday Night | 71°F | Mostly Clear | 10 mph S | 10% |
| Sunday | 89°F | Sunny | 10 to 15 mph S | 10% |
| Sunday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph S | 24% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph S | 24% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 29% |
Forecast source: National Weather Service (api.weather.gov) for Pleasant Plain (41.147, -91.860). Updated through the day.
Growing snapshot for Pleasant Plain
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
165 days
Hardiness zone
5b
More local growing data for Pleasant Plain: nearby ZIP 52540 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Washington, Ia (10.6 mi from Pleasant Plain). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.