Cromwell, IA Weather & Growing Conditions
This Afternoon
49°F
Cloudy
Cloudy. High near 49, with temperatures falling to around 47 in the afternoon. West wind around 16 mph, with gusts as high as 23 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 49°F | Cloudy | 16 mph W | 10% |
| Tonight | 40°F | Mostly Cloudy then Chance Rain Showers | 12 mph WNW | 25% |
| Thursday | 50°F | Chance Rain Showers then Cloudy | 13 mph NW | 28% |
| Thursday Night | 37°F | Mostly Cloudy | 6 to 9 mph N | 4% |
| Friday | 48°F | Partly Sunny | 3 to 7 mph N | 4% |
| Friday Night | 29°F | Partly Cloudy | 2 mph E | 0% |
| Saturday | 53°F | Mostly Sunny | 1 to 6 mph SW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph SW | 0% |
| Sunday | 60°F | Sunny | 5 mph W | 0% |
| Sunday Night | 38°F | Mostly Clear | 2 to 6 mph SW | 0% |
| Monday | 66°F | Sunny | 6 to 12 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 6 mph W | 1% |
| Tuesday | 64°F | Sunny | 5 mph N | 2% |
| Tuesday Night | 42°F | Partly Cloudy | 3 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cromwell, IA
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
164 days
Hardiness zone
5b
Explore more for Cromwell, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Creston 2 Sw, Ia (3.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.