Monroe, IA Weather & Growing Conditions
Tonight
63°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. Mostly cloudy. Low around 63, with temperatures rising to around 65 overnight. North northwest wind 5 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 8 mph NNW | 75% |
| Sunday | 66°F | Chance Rain Showers then Chance Drizzle | 9 to 13 mph NNE | 44% |
| Sunday Night | 57°F | Rain Showers Likely | 13 mph ENE | 56% |
| Monday | 60°F | Rain Showers | 13 mph NE | 84% |
| Monday Night | 53°F | Rain Showers Likely | 12 mph NE | 71% |
| Tuesday | 60°F | Slight Chance Rain Showers | 9 mph NE | 17% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 8 mph NE | 4% |
| Wednesday | 64°F | Mostly Sunny | 6 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph E | 3% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph ESE | 18% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 2 mph ESE | 22% |
| Friday | 69°F | Slight Chance Rain Showers | 2 to 6 mph E | 22% |
| Friday Night | 59°F | Mostly Cloudy | 5 mph E | 6% |
| Saturday | 70°F | Chance Rain Showers | 3 to 7 mph ESE | 25% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Monroe, IA
Last spring frost
Apr 20
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
5b
Explore more for Monroe, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Knoxville, Ia (10.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.