St. Olaf, IA Weather & Growing Conditions
Tonight
61°F
Chance Showers And Thunderstorms then Showers And Thunderstorms
A chance of showers and thunderstorms before midnight, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 61. Southeast wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 9 to 14 mph SE | 91% |
| Saturday | 77°F | Showers And Thunderstorms Likely | 8 mph S | 74% |
| Saturday Night | 57°F | Showers And Thunderstorms | 9 mph N | 75% |
| Sunday | 68°F | Chance Rain Showers | 10 to 14 mph NE | 45% |
| Sunday Night | 52°F | Mostly Cloudy | 13 mph NE | 12% |
| Monday | 64°F | Chance Rain Showers | 13 mph NE | 42% |
| Monday Night | 47°F | Chance Rain Showers | 7 to 13 mph NE | 42% |
| Tuesday | 62°F | Chance Rain Showers | 9 mph NE | 32% |
| Tuesday Night | 44°F | Partly Cloudy | 2 to 6 mph NE | 5% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph E | 2% |
| Thursday | 68°F | Partly Sunny | 3 mph E | 8% |
| Thursday Night | 50°F | Partly Cloudy | 1 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 3 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Olaf, IA
Last spring frost
May 8
First fall frost
Oct 1
Growing season
146 days
Hardiness zone
5a
Explore more for St. Olaf, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Elkader 6 Ssw, Ia (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.