Colwell, IA Weather & Growing Conditions
Today
73°F
Isolated Rain Showers then Isolated Showers And Thunderstorms
Isolated rain showers between 10am and 2pm, then isolated showers and thunderstorms between 2pm and 3pm, then scattered showers and thunderstorms between 3pm and 4pm, then scattered showers and thunderstorms. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. Northwest wind around 9 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Isolated Rain Showers then Isolated Showers And Thunderstorms | 9 mph NW | 53% |
| Tonight | 58°F | Chance Showers And Thunderstorms | 5 to 8 mph NW | 62% |
| Wednesday | 74°F | Partly Sunny | 5 mph N | 5% |
| Wednesday Night | 54°F | Mostly Clear | 3 mph NW | 1% |
| Thursday | 77°F | Sunny | 1 to 5 mph SE | 0% |
| Thursday Night | 59°F | Mostly Clear | 5 mph S | 1% |
| Friday | 81°F | Sunny | 5 to 12 mph S | 9% |
| Friday Night | 64°F | Mostly Clear | 9 mph S | 12% |
| Saturday | 82°F | Sunny | 6 to 10 mph S | 10% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 12 mph S | 33% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 10 mph S | 33% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms | 9 mph S | 33% |
| Monday | 82°F | Chance Showers And Thunderstorms | 12 mph SE | 33% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 10 mph NE | 38% |
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 Aug 4, 2026.