LaCrosse, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for LaCrosse, a town in Whitman County, Washington.
Today
90°F
Patchy Smoke then Haze
Patchy smoke before 10am, then haze and areas of smoke. Sunny, with a high near 90. Northeast wind around 5 mph.
7-day forecast for LaCrosse
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Patchy Smoke then Haze | 5 mph NE | 0% |
| Tonight | 53°F | Haze | 3 mph NE | 0% |
| Wednesday | 96°F | Patchy Smoke then Sunny | 5 mph E | 0% |
| Wednesday Night | 56°F | Patchy Smoke then Clear | 3 mph NW | 0% |
| Thursday | 100°F | Sunny | 5 mph S | 0% |
| Thursday Night | 61°F | Mostly Clear | 2 to 6 mph SW | 0% |
| Friday | 98°F | Sunny | 6 to 12 mph SW | 0% |
| Friday Night | 61°F | Clear | 5 to 10 mph SW | 0% |
| Saturday | 94°F | Sunny | 5 to 9 mph SW | 0% |
| Saturday Night | 59°F | Mostly Clear | 5 to 9 mph SW | 0% |
| Sunday | 90°F | Sunny | 7 to 10 mph SW | 0% |
| Sunday Night | 56°F | Mostly Clear | 7 mph SW | 0% |
| Monday | 89°F | Sunny | 8 mph SW | 0% |
| Monday Night | 55°F | Mostly Clear | 6 mph SW | 0% |
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
Nearby towns & communities
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Farmington
Garfield
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Malden
Oakesdale
Palouse
Pullman
Rosalia
St. John
Steptoe
Tekoa
Uniontown
West Clarkston-Highland
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 Aug 4, 2026.