St. Olaf, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Olaf, a city in Clayton County, Iowa.
This Afternoon
68°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 68, with temperatures falling to around 65 in the afternoon. South wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for St. Olaf
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms | 13 mph S | 79% |
| Tonight | 51°F | Showers And Thunderstorms | 8 to 12 mph S | 90% |
| Wednesday | 55°F | Chance Rain Showers | 8 to 15 mph SW | 51% |
| Wednesday Night | 44°F | Rain Showers | 14 mph SW | 84% |
| Thursday | 51°F | Rain Showers | 13 mph NW | 76% |
| Thursday Night | 38°F | Mostly Cloudy | 12 mph N | 14% |
| Friday | 50°F | Partly Sunny | 3 to 10 mph N | 3% |
| Friday Night | 30°F | Partly Cloudy | 2 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 34°F | Mostly Clear | 3 mph W | 4% |
| Sunday | 59°F | Sunny | 3 to 8 mph W | 12% |
| Sunday Night | 35°F | Mostly Clear | 5 mph SW | 2% |
| Monday | 61°F | Sunny | 3 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 6 mph W | 1% |
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 Nov 4, 2026.