St. Paul, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Paul, a city in Lee County, Iowa.
Overnight
70°F
Patchy Fog
Patchy fog and a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 70. South wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for St. Paul
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Patchy Fog | 5 mph S | 16% |
| Saturday | 85°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 25% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 5 mph W | 77% |
| Sunday | 73°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph N | 79% |
| Sunday Night | 59°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 10 mph NE | 65% |
| Monday | 64°F | Showers And Thunderstorms Likely | 10 mph NE | 65% |
| Monday Night | 53°F | Chance Rain Showers | 5 to 10 mph NE | 43% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 41% |
| Tuesday Night | 48°F | Partly Cloudy | 5 mph NE | 4% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 69°F | Partly Sunny | 0 to 5 mph NE | 6% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph E | 5% |
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 Sep 19, 2026.