St. Paul, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Paul, a city in Lee County, Iowa.
Today
88°F
Mostly Sunny
Mostly sunny, with a high near 88. South wind around 5 mph.
7-day forecast for St. Paul
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny | 5 mph S | 10% |
| Tonight | 67°F | Chance Showers And Thunderstorms | 5 mph NE | 33% |
| Wednesday | 81°F | Showers And Thunderstorms Likely | 5 mph NE | 79% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 5 mph N | 82% |
| Thursday | 81°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph NE | 69% |
| Thursday Night | 62°F | Mostly Clear | 0 mph | 8% |
| Friday | 84°F | Mostly Sunny | 0 to 5 mph SE | 7% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 17% |
| Saturday | 88°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph S | 17% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 7% |
| Sunday | 89°F | Sunny | 10 mph SW | 7% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 21% |
| Monday | 90°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph S | 21% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 10 mph S | 27% |
Forecast source: National Weather Service (api.weather.gov) for St. Paul (40.768, -91.516). Updated through the day.
Growing snapshot for St. Paul
Last spring frost
Apr 17
First fall frost
Oct 22
Growing season
187 days
Hardiness zone
6a
More local growing data for St. Paul: nearby ZIP 52657 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Argyle
Denmark
Donnellson
Farmington
Fort Madison
Franklin
Hillsboro
Houghton
Keokuk
Montrose
Mooar
Oak Hills
Sandusky
West Point
Wever
Climate data from the nearest NOAA station, Donnellson, Ia (8.8 mi from St. Paul). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.