Colwell, IA Weather & Growing Conditions
Overnight
48°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. Low around 48, with temperatures rising to around 51 overnight. West wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Slight Chance Rain Showers | 10 mph W | 23% |
| Wednesday | 52°F | Rain Showers Likely | 12 to 16 mph W | 72% |
| Wednesday Night | 43°F | Rain Showers Likely | 12 to 15 mph W | 71% |
| Thursday | 50°F | Chance Rain Showers | 15 mph NW | 41% |
| Thursday Night | 36°F | Mostly Cloudy | 7 to 13 mph N | 4% |
| Friday | 46°F | Mostly Sunny | 3 to 8 mph N | 2% |
| Friday Night | 27°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 50°F | Sunny | 1 to 6 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 6 mph W | 1% |
| Sunday | 55°F | Sunny | 7 mph W | 2% |
| Sunday Night | 35°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 60°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 58°F | Mostly Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Colwell, IA
Last spring frost
Apr 30
First fall frost
Oct 6
Growing season
157 days
Hardiness zone
5a
Explore more for Colwell, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Charles City, Ia (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.