Washburn, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Washburn, a community in Black Hawk County, Iowa.
Today
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 8am. Mostly cloudy. High near 80, with temperatures falling to around 77 in the afternoon. West southwest wind 6 to 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Washburn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Chance Showers And Thunderstorms | 6 to 9 mph WSW | 36% |
| Tonight | 62°F | Showers And Thunderstorms | 5 to 9 mph N | 81% |
| Wednesday | 74°F | Chance Showers And Thunderstorms | 5 mph NNE | 37% |
| Wednesday Night | 55°F | Slight Chance Rain Showers | 5 mph N | 24% |
| Thursday | 79°F | Sunny | 3 mph E | 3% |
| Thursday Night | 59°F | Mostly Clear | 3 mph SSE | 0% |
| Friday | 82°F | Sunny | 2 to 9 mph SSE | 5% |
| Friday Night | 65°F | Mostly Clear | 8 mph S | 12% |
| Saturday | 85°F | Sunny | 5 to 9 mph S | 9% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 12 mph S | 20% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph S | 20% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 9 mph SSE | 36% |
| Monday | 85°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 12 mph SSE | 36% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 mph E | 34% |
Forecast source: National Weather Service (api.weather.gov) for Washburn (42.410, -92.267). Updated through the day.
Growing snapshot for Washburn
Last spring frost
Apr 27
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
More local growing data for Washburn: nearby ZIP 50634 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Cedar Falls
Dunkerton
Elk Run Heights
Evansdale
Gilbertville
Hudson
Jesup
La Porte City
Raymond
Waterloo
Climate data from the nearest NOAA station, Waterloo Muni Ap, Ia (13.4 mi from Washburn). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.