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LaCrosse, WA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for LaCrosse, a town in Whitman County, Washington.

This Afternoon
81°F
Sunny
Sunny, with a high near 81. West wind around 3 mph.

7-day forecast for LaCrosse

WhenTempForecastWindPrecip
This Afternoon 81°F Sunny 3 mph W 0%
Tonight 52°F Mostly Clear 3 mph NE 0%
Sunday 87°F Sunny 3 mph SE 0%
Sunday Night 54°F Mostly Clear 3 mph NE 0%
Monday 87°F Sunny 3 mph SE 0%
Monday Night 55°F Partly Cloudy 2 mph S 0%
Tuesday 83°F Mostly Sunny 2 to 7 mph S 0%
Tuesday Night 52°F Partly Cloudy 5 mph SW 1%
Wednesday 76°F Mostly Sunny 7 mph SW 1%
Wednesday Night 50°F Partly Cloudy 2 to 6 mph SW 1%
Thursday 76°F Mostly Sunny 3 mph SW 3%
Thursday Night 49°F Partly Cloudy 3 mph NE 7%
Friday 72°F Mostly Sunny 5 mph SW 9%
Friday Night 47°F Mostly Cloudy 5 mph SW 11%

Forecast source: National Weather Service (api.weather.gov) for LaCrosse (46.796, -117.918). Updated through the day.

Growing snapshot for LaCrosse

Last spring frost
May 13
First fall frost
Sep 26
Growing season
133 days
Hardiness zone
7a

More local growing data for LaCrosse: nearby ZIP 99143 weather · frost dates · planting calendar · Washington frost dates

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Climate data from the nearest NOAA station, Lacrosse, Wa (3.9 mi from LaCrosse). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.