Monroe, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monroe, a city in Jasper County, Iowa.
Today
85°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 85, with temperatures falling to around 82 in the afternoon. West northwest wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Monroe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Chance Showers And Thunderstorms | 5 to 8 mph WNW | 53% |
| Tonight | 63°F | Showers And Thunderstorms | 7 to 10 mph NNE | 90% |
| Wednesday | 73°F | Showers And Thunderstorms Likely | 7 mph NNE | 87% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 3 to 7 mph NNE | 49% |
| Thursday | 80°F | Sunny | 5 mph ENE | 7% |
| Thursday Night | 61°F | Mostly Clear | 3 mph SE | 2% |
| Friday | 85°F | Sunny | 3 to 7 mph SSE | 6% |
| Friday Night | 66°F | Mostly Clear | 6 mph SSE | 14% |
| Saturday | 89°F | Sunny | 5 to 9 mph S | 10% |
| Saturday Night | 72°F | Mostly Clear | 10 mph SSW | 13% |
| Sunday | 90°F | Mostly Sunny | 12 mph S | 13% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph S | 30% |
| Monday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 9 to 13 mph S | 30% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 13 mph SE | 27% |
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 Aug 4, 2026.