Coulter, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coulter, a city in Franklin County, Iowa.
Tonight
44°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 44, with temperatures rising to around 48 overnight. Northwest wind 7 to 13 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Coulter
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Showers And Thunderstorms | 7 to 13 mph NW | 88% |
| Wednesday | 50°F | Rain Showers Likely | 10 to 17 mph W | 59% |
| Wednesday Night | 40°F | Rain Showers Likely | 13 mph W | 66% |
| Thursday | 50°F | Rain Showers Likely | 13 mph NW | 63% |
| Thursday Night | 36°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph N | 16% |
| Friday | 48°F | Partly Sunny | 2 to 7 mph NNE | 4% |
| Friday Night | 30°F | Partly Cloudy | 1 mph NNE | 1% |
| Saturday | 53°F | Mostly Sunny | 1 to 5 mph WSW | 2% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 3% |
| Sunday | 58°F | Sunny | 3 to 7 mph W | 6% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 2% |
| Monday | 62°F | Mostly Sunny | 6 to 10 mph WSW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 59°F | Mostly Sunny | 6 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Coulter (42.733, -93.370). Updated through the day.
Growing snapshot for Coulter
Last spring frost
Apr 29
First fall frost
Oct 9
Growing season
162 days
Hardiness zone
5a
More local growing data for Coulter: nearby ZIP 50431 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hampton, Ia (8.6 mi from Coulter). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.