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St. Olaf, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for St. Olaf, a city in Clayton County, Iowa.

Overnight
61°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 61. Southeast wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

7-day forecast for St. Olaf

WhenTempForecastWindPrecip
Overnight 61°F Showers And Thunderstorms 13 mph SE 90%
Saturday 75°F Showers And Thunderstorms 9 mph S 88%
Saturday Night 57°F Showers And Thunderstorms 6 to 12 mph N 83%
Sunday 68°F Slight Chance Rain Showers then Mostly Cloudy 15 mph NE 23%
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%

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

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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.