Monmouth, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monmouth, a city in Jackson County, Iowa.
Overnight
65°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3am, then showers and thunderstorms. Mostly cloudy, with a low around 65. Southeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Monmouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Chance Showers And Thunderstorms | 5 mph SE | 87% |
| Saturday | 81°F | Showers And Thunderstorms Likely | 5 mph S | 74% |
| Saturday Night | 62°F | Showers And Thunderstorms | 5 mph N | 77% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 67% |
| Sunday Night | 55°F | Rain Showers Likely | 10 mph NE | 62% |
| Monday | 64°F | Chance Rain Showers | 10 mph NE | 53% |
| Monday Night | 50°F | Chance Rain Showers | 5 to 10 mph NE | 53% |
| Tuesday | 62°F | Chance Rain Showers | 5 to 10 mph NE | 41% |
| Tuesday Night | 47°F | Partly Cloudy | 0 to 5 mph NE | 7% |
| Wednesday | 66°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 69°F | Mostly Sunny | 0 to 5 mph NE | 6% |
| Thursday Night | 53°F | Partly Cloudy | 0 mph | 5% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 5% |
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 Sep 19, 2026.