Monroe, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monroe, a city in Jasper County, Iowa.
This Afternoon
83°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Partly sunny. High near 83, with temperatures falling to around 80 in the afternoon. West wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Monroe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Slight Chance Showers And Thunderstorms | 7 mph W | 22% |
| Tonight | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 8 mph N | 74% |
| Sunday | 66°F | Chance Rain Showers then Chance Drizzle | 9 to 13 mph NNE | 44% |
| Sunday Night | 58°F | Rain Showers Likely | 13 mph ENE | 56% |
| Monday | 60°F | Rain Showers | 13 mph NE | 83% |
| Monday Night | 53°F | Rain Showers Likely | 12 mph NE | 74% |
| 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 ENE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 3 mph E | 3% |
| Thursday | 67°F | Slight Chance Rain Showers | 5 mph ESE | 18% |
| Thursday Night | 58°F | Slight Chance Rain Showers | 3 mph ESE | 22% |
| Friday | 69°F | Slight Chance Rain Showers | 2 to 6 mph E | 22% |
| Friday Night | 59°F | Mostly Cloudy | 3 mph E | 7% |
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.