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
79°F
Mostly Cloudy then Scattered Showers And Thunderstorms
Scattered rain showers between noon and 4pm, then scattered showers and thunderstorms. Mostly cloudy. High near 79, with temperatures falling to around 75 in the afternoon. West wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for St. Olaf
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Cloudy then Scattered Showers And Thunderstorms | 6 to 9 mph W | 48% |
| Tonight | 61°F | Chance Showers And Thunderstorms | 5 mph NW | 64% |
| Wednesday | 75°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 3 mph NW | 23% |
| Wednesday Night | 54°F | Partly Cloudy | 0 to 3 mph NW | 5% |
| Thursday | 79°F | Sunny | 2 mph SE | 3% |
| Thursday Night | 58°F | Mostly Clear | 1 mph S | 0% |
| Friday | 82°F | Sunny | 1 to 8 mph S | 5% |
| Friday Night | 63°F | Mostly Clear | 3 to 7 mph S | 10% |
| Saturday | 84°F | Mostly Sunny | 3 to 7 mph SW | 10% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 8 mph S | 31% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 10 mph S | 31% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 7 mph S | 41% |
| Monday | 84°F | Chance Showers And Thunderstorms | 8 mph S | 41% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph NE | 35% |
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 Aug 4, 2026.