Washington, IA Weather & Growing Conditions
This Afternoon
83°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Southwest wind around 10 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Chance Showers And Thunderstorms | 10 mph SW | 33% |
| Tonight | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NW | 88% |
| Sunday | 70°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 70% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 15 mph NE | 62% |
| Monday | 63°F | Showers And Thunderstorms Likely | 15 mph NE | 62% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 47% |
| Tuesday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph NE | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 68°F | Partly Sunny | 5 mph NE | 6% |
| Thursday Night | 55°F | Mostly Cloudy | 5 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 5 mph E | 6% |
| Friday Night | 55°F | Partly Cloudy | 5 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Washington, IA
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
165 days
Hardiness zone
5b
Explore more for Washington, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Washington, Ia (1.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.