St. Olaf, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Olaf, a city in Clayton County, Iowa.
Today
72°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a high near 72. South wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for St. Olaf
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Showers And Thunderstorms | 7 mph S | 87% |
| Tonight | 57°F | Showers And Thunderstorms | 6 to 9 mph N | 75% |
| Sunday | 64°F | Chance Rain Showers | 13 mph NE | 44% |
| Sunday Night | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 13 mph NE | 22% |
| Monday | 64°F | Chance Rain Showers | 12 mph NE | 25% |
| Monday Night | 46°F | Slight Chance Rain Showers | 5 to 10 mph NE | 19% |
| Tuesday | 62°F | Slight Chance Rain Showers then Partly Sunny | 5 to 9 mph NE | 16% |
| Tuesday Night | 43°F | Partly Cloudy | 2 to 6 mph NE | 2% |
| Wednesday | 66°F | Mostly Sunny | 2 to 6 mph NE | 1% |
| Wednesday Night | 47°F | Partly Cloudy | 3 mph E | 2% |
| Thursday | 68°F | Mostly Sunny | 1 to 5 mph NE | 7% |
| Thursday Night | 50°F | Partly Cloudy | 2 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 1 to 5 mph E | 5% |
| Friday Night | 50°F | Partly Cloudy | 3 mph E | 4% |
Forecast source: National Weather Service (api.weather.gov) for St. Olaf (42.927, -91.388). Updated through the day.
Growing snapshot for St. Olaf
Last spring frost
May 8
First fall frost
Oct 1
Growing season
146 days
Hardiness zone
5a
More local growing data for St. Olaf: nearby ZIP 52072 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Clayton
Colesburg
Edgewood
Elkader
Elkport
Farmersburg
Garber
Garnavillo
Guttenberg
Luana
Marquette
McGregor
North Buena Vista
Osterdock
Strawberry Point
Volga
Climate data from the nearest NOAA station, Elkader 6 Ssw, Ia (10.7 mi from St. Olaf). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.