Monmouth, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monmouth, a city in Jackson County, Iowa.
Today
83°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Partly sunny. High near 83, with temperatures falling to around 80 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Monmouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 32% |
| Tonight | 64°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 87% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 0 mph | 70% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 0 mph | 48% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 mph | 26% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 3% |
| Friday | 82°F | Sunny | 0 to 5 mph S | 4% |
| Friday Night | 64°F | Mostly Clear | 0 mph | 8% |
| Saturday | 85°F | Mostly Sunny | 0 to 5 mph S | 10% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph S | 23% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph S | 23% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 39% |
| Monday | 86°F | Chance Showers And Thunderstorms | 5 mph S | 39% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 mph E | 39% |
Forecast source: National Weather Service (api.weather.gov) for Monmouth (42.075, -90.882). Updated through the day.
Growing snapshot for Monmouth
Last spring frost
Apr 25
First fall frost
Oct 14
Growing season
171 days
Hardiness zone
5a
More local growing data for Monmouth: nearby ZIP 52207 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Andrew
Baldwin
Bellevue
La Motte
Maquoketa
Miles
Preston
Sabula
Spragueville
Springbrook
St. Donatus
Zwingle
Climate data from the nearest NOAA station, Maquoketa, Ia (8.5 mi from Monmouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.