Colwell, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Colwell, a city in Floyd County, Iowa.
Tonight
48°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 48, with temperatures rising to around 52 overnight. Northeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Colwell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Rain Showers Likely | 10 mph NE | 69% |
| Wednesday | 52°F | Rain Showers | 10 to 15 mph SW | 78% |
| Wednesday Night | 43°F | Rain Showers | 15 mph W | 75% |
| Thursday | 50°F | Rain Showers Likely | 15 mph NW | 70% |
| Thursday Night | 37°F | Mostly Cloudy | 9 to 13 mph N | 11% |
| Friday | 47°F | Partly Sunny | 3 to 10 mph N | 0% |
| Friday Night | 30°F | Partly Cloudy | 2 mph NW | 0% |
| Saturday | 52°F | Mostly Sunny | 1 to 6 mph SW | 2% |
| Saturday Night | 35°F | Mostly Clear | 6 mph W | 5% |
| Sunday | 57°F | Sunny | 8 mph W | 9% |
| Sunday Night | 37°F | Mostly Clear | 7 mph SW | 1% |
| Monday | 60°F | Mostly Sunny | 7 to 12 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 7 mph W | 1% |
| Tuesday | 58°F | Mostly Sunny | 7 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Colwell (43.157, -92.592). Updated through the day.
Growing snapshot for Colwell
Last spring frost
Apr 30
First fall frost
Oct 6
Growing season
157 days
Hardiness zone
5a
More local growing data for Colwell: nearby ZIP 50620 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Charles City, Ia (7.8 mi from Colwell). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.