Derby, IA Weather & Growing Conditions
Overnight
47°F
Cloudy
Cloudy. Low around 47, with temperatures rising to around 49 overnight. West wind around 14 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Cloudy | 14 mph W | 13% |
| Wednesday | 53°F | Mostly Cloudy | 15 mph W | 14% |
| Wednesday Night | 43°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph W | 21% |
| Thursday | 53°F | Chance Rain Showers | 8 to 12 mph NW | 29% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph NNW | 15% |
| Friday | 50°F | Partly Sunny | 3 to 8 mph N | 6% |
| Friday Night | 30°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 3 mph WSW | 1% |
| Saturday Night | 35°F | Mostly Clear | 5 mph WSW | 1% |
| Sunday | 59°F | Sunny | 6 mph W | 1% |
| Sunday Night | 37°F | Clear | 5 mph SW | 0% |
| Monday | 65°F | Sunny | 5 to 9 mph SW | 0% |
| Monday Night | 42°F | Clear | 6 mph W | 0% |
| Tuesday | 65°F | Sunny | 5 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Derby, IA
Last spring frost
May 5
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5b
Explore more for Derby, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Chariton 1 E, Ia (10.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.