St. Ansgar, IA Weather & Growing Conditions
Overnight
46°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 46, with temperatures rising to around 50 overnight. West wind around 9 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Chance Rain Showers | 9 mph W | 44% |
| Wednesday | 51°F | Rain Showers Likely | 10 to 15 mph W | 74% |
| Wednesday Night | 42°F | Rain Showers | 10 to 14 mph W | 81% |
| Thursday | 50°F | Chance Rain Showers then Cloudy | 12 to 15 mph NW | 39% |
| Thursday Night | 33°F | Mostly Cloudy | 5 to 12 mph N | 5% |
| Friday | 46°F | Mostly Sunny | 3 to 7 mph N | 1% |
| Friday Night | 26°F | Partly Cloudy | 2 mph NW | 0% |
| Saturday | 49°F | Sunny | 1 to 7 mph SW | 1% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 55°F | Sunny | 5 to 8 mph W | 3% |
| Sunday Night | 34°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 61°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 58°F | Mostly Sunny | 6 mph NW | 0% |
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 Nov 4, 2026.