Monmouth, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monmouth, a city in Jackson County, Iowa.
Tonight
51°F
Mostly Cloudy
Mostly cloudy. Low around 51, with temperatures rising to around 54 overnight. South wind 5 to 10 mph.
7-day forecast for Monmouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Cloudy | 5 to 10 mph S | 13% |
| Wednesday | 55°F | Chance Rain Showers | 10 mph SW | 38% |
| Wednesday Night | 45°F | Chance Rain Showers | 10 mph SW | 25% |
| Thursday | 54°F | Rain Showers Likely | 5 to 10 mph W | 58% |
| Thursday Night | 39°F | Mostly Cloudy | 5 mph N | 13% |
| Friday | 50°F | Partly Sunny | 5 mph N | 2% |
| Friday Night | 30°F | Mostly Clear | 0 mph | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 34°F | Mostly Clear | 0 mph | 2% |
| Sunday | 56°F | Sunny | 0 to 5 mph W | 3% |
| Sunday Night | 35°F | Mostly Clear | 0 mph | 0% |
| Monday | 62°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 62°F | Sunny | 0 mph | 0% |
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 Nov 4, 2026.