Washington, MO Weather & Growing Conditions
Tonight
70°F
Slight Chance Showers And Thunderstorms then Mostly Clear
A slight chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 70. South wind around 1 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 1 mph S | 15% |
| Saturday | 97°F | Partly Sunny | 5 mph SW | 4% |
| Saturday Night | 70°F | Partly Cloudy | 2 mph SW | 5% |
| Sunday | 92°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 mph W | 23% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph N | 68% |
| Monday | 79°F | Showers And Thunderstorms Likely | 5 mph N | 68% |
| Monday Night | 58°F | Showers And Thunderstorms Likely | 6 mph N | 63% |
| Tuesday | 71°F | Slight Chance Rain Showers then Mostly Cloudy | 6 mph N | 24% |
| Tuesday Night | 52°F | Mostly Cloudy | 1 to 5 mph N | 5% |
| Wednesday | 74°F | Mostly Sunny | 3 mph N | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 2 mph N | 1% |
| Thursday | 75°F | Mostly Sunny | 2 mph NE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 1 mph NE | 3% |
| Friday | 75°F | Mostly Sunny | 3 mph NE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Washington, MO
Last spring frost
Apr 8
First fall frost
Oct 25
Growing season
199 days
Hardiness zone
6b
Explore more for Washington, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Washington, Mo (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.