Irondale, MO Weather & Growing Conditions
Tonight
49°F
Chance Light Rain
A chance of rain before 1am, then a slight chance of drizzle between 1am and 4am. Mostly cloudy, with a low around 49. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Chance Light Rain | 6 to 9 mph SW | 32% |
| Wednesday | 64°F | Partly Sunny | 6 to 9 mph W | 1% |
| Wednesday Night | 38°F | Mostly Clear | 5 mph W | 0% |
| Thursday | 68°F | Sunny | 3 to 7 mph W | 2% |
| Thursday Night | 39°F | Mostly Cloudy | 3 mph NW | 13% |
| Friday | 59°F | Partly Sunny | 2 to 8 mph NW | 3% |
| Friday Night | 35°F | Mostly Cloudy | 0 to 5 mph N | 3% |
| Saturday | 58°F | Partly Sunny | 0 to 3 mph N | 0% |
| Saturday Night | 32°F | Partly Cloudy | 1 mph N | 2% |
| Sunday | 64°F | Sunny | 0 to 6 mph NW | 6% |
| Sunday Night | 32°F | Mostly Clear | 3 mph NW | 5% |
| Monday | 68°F | Sunny | 1 to 6 mph W | 1% |
| Monday Night | 37°F | Mostly Clear | 1 to 5 mph SW | 1% |
| Tuesday | 71°F | Sunny | 1 to 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Irondale, MO
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
6b
Explore more for Irondale, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Potosi 4 Sw, Mo (9.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.