Monroe, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monroe, a city in Jasper County, Iowa.
Overnight
70°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South southwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Monroe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Chance Showers And Thunderstorms | 5 mph SSW | 39% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 5 to 9 mph SW | 52% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 6 to 9 mph NNW | 52% |
| Sunday | 67°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 9 to 13 mph NNE | 48% |
| Sunday Night | 58°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 14 mph NE | 59% |
| Monday | 62°F | Rain Showers Likely | 13 mph NE | 60% |
| Monday Night | 52°F | Rain Showers Likely | 12 mph NE | 60% |
| Tuesday | 61°F | Slight Chance Rain Showers then Partly Sunny | 10 mph NE | 15% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 8 mph ENE | 2% |
| Wednesday | 65°F | Sunny | 6 mph ENE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph E | 4% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph E | 19% |
| Thursday Night | 56°F | Mostly Cloudy | 3 mph E | 8% |
| Friday | 68°F | Partly Sunny | 6 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov) for Monroe (41.519, -93.104). Updated through the day.
Growing snapshot for Monroe
Last spring frost
Apr 21
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
5b
More local growing data for Monroe: nearby ZIP 50170 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Baxter
Colfax
Kellogg
Lambs Grove
Lynnville
Mingo
Newton
Oakland Acres
Prairie City
Reasnor
Sully
Valeria
Climate data from the nearest NOAA station, Des Moines 17 E, Ia (8.9 mi from Monroe). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.