Washburn, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Washburn, a community in Black Hawk County, Iowa.

This Afternoon

69°F

Showers And Thunderstorms

Showers and thunderstorms. Mostly cloudy. High near 69, with temperatures falling to around 64 in the afternoon. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Washburn

When	Temp	Forecast	Wind	Precip
This Afternoon	69°F	Showers And Thunderstorms	10 mph S	77%
Tonight	48°F	Showers And Thunderstorms Likely	8 to 12 mph S	71%
Wednesday	54°F	Chance Rain Showers	12 to 17 mph WSW	43%
Wednesday Night	43°F	Rain Showers Likely	15 mph WSW	55%
Thursday	52°F	Rain Showers Likely	13 mph WNW	69%
Thursday Night	38°F	Slight Chance Rain Showers then Mostly Cloudy	12 mph N	16%
Friday	50°F	Partly Sunny	5 to 10 mph N	2%
Friday Night	32°F	Partly Cloudy	1 to 5 mph NW	0%
Saturday	53°F	Mostly Sunny	1 to 6 mph WSW	2%
Saturday Night	35°F	Mostly Clear	5 mph W	4%
Sunday	59°F	Sunny	5 to 9 mph WNW	8%
Sunday Night	37°F	Mostly Clear	6 mph SW	2%
Monday	62°F	Sunny	6 to 13 mph SW	0%
Monday Night	39°F	Mostly Clear	8 mph WNW	0%

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

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

All Iowa locations ›

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 Nov 3, 2026.