Washington, MO Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Washington, a city in Franklin County, Missouri.

Today

90°F

Patchy Fog then Sunny

Patchy fog before 9am. Sunny, with a high near 90. Southeast wind around 1 mph.

7-day forecast for Washington

When	Temp	Forecast	Wind	Precip
Today	90°F	Patchy Fog then Sunny	1 mph SE	0%
Tonight	68°F	Mostly Clear	2 mph SE	0%
Wednesday	91°F	Sunny then Isolated Showers And Thunderstorms	2 mph S	15%
Wednesday Night	70°F	Slight Chance Showers And Thunderstorms	2 mph S	67%
Thursday	88°F	Showers And Thunderstorms Likely	2 mph S	69%
Thursday Night	69°F	Partly Cloudy then Chance Showers And Thunderstorms	1 mph W	30%
Friday	88°F	Chance Showers And Thunderstorms	1 mph SW	30%
Friday Night	69°F	Chance Showers And Thunderstorms	0 mph	28%
Saturday	91°F	Chance Showers And Thunderstorms then Mostly Sunny	1 mph SW	28%
Saturday Night	71°F	Mostly Clear	2 mph S	6%
Sunday	93°F	Sunny	5 mph SW	3%
Sunday Night	73°F	Mostly Clear	3 mph S	5%
Monday	95°F	Sunny	5 mph SW	4%
Monday Night	74°F	Mostly Clear	3 mph S	11%

Forecast source: National Weather Service (api.weather.gov) for Washington (38.552, -91.015). Updated through the day.

Growing snapshot for Washington

Last spring frost

Apr 8

First fall frost

Oct 25

Growing season

199 days

Hardiness zone

More local growing data for Washington: nearby ZIP 63090 weather · frost dates · planting calendar · Missouri frost dates

Nearby towns & communities

Berger Charmwood Gerald Gray Summit LaBarque Creek Lake St. Clair Lake Tekakwitha Leslie Miramiguoa Park New Haven Oak Grove Village Pacific Parkway St. Clair Stanton Sullivan Three Creeks Union Villa Ridge

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Climate data from the nearest NOAA station, Washington, Mo (4 mi from Washington). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.