St. Ansgar, IA Weather & Growing Conditions
Today
66°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 66, with temperatures falling to around 64 in the afternoon. Northeast wind 3 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Showers And Thunderstorms | 3 to 9 mph NE | 80% |
| Tonight | 56°F | Slight Chance Rain Showers | 12 mph N | 21% |
| Sunday | 65°F | Mostly Cloudy | 15 mph NE | 9% |
| Sunday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph NE | 20% |
| Monday | 62°F | Chance Rain Showers | 12 mph NE | 25% |
| Monday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 9 mph E | 18% |
| Tuesday | 61°F | Mostly Sunny | 5 to 8 mph E | 8% |
| Tuesday Night | 42°F | Mostly Clear | 6 mph E | 1% |
| Wednesday | 64°F | Sunny | 6 mph E | 1% |
| Wednesday Night | 47°F | Mostly Clear | 5 mph SE | 5% |
| Thursday | 66°F | Mostly Sunny | 2 to 6 mph SE | 10% |
| Thursday Night | 50°F | Partly Cloudy | 3 mph SE | 4% |
| Friday | 68°F | Mostly Sunny | 2 to 6 mph SE | 4% |
| Friday Night | 51°F | Partly Cloudy | 5 mph SE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Ansgar, IA
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
163 days
Hardiness zone
5a
Explore more for St. Ansgar, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Osage, Ia (10.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.