Colfax, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Colfax, a city in Whitman County, Washington.
Today
77°F
Sunny
Sunny. High near 77, with temperatures falling to around 75 in the afternoon. Southwest wind around 3 mph.
7-day forecast for Colfax
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Sunny | 3 mph SW | 1% |
| Tonight | 48°F | Mostly Clear | 2 mph N | 1% |
| Sunday | 81°F | Sunny | 1 to 5 mph SE | 0% |
| Sunday Night | 49°F | Clear | 2 mph E | 0% |
| Monday | 82°F | Sunny | 5 mph S | 0% |
| Monday Night | 50°F | Mostly Clear | 0 to 3 mph SW | 0% |
| Tuesday | 79°F | Sunny | 0 to 5 mph S | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 0 to 3 mph SW | 1% |
| Wednesday | 75°F | Mostly Sunny | 1 to 5 mph SW | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 3 mph S | 1% |
| Thursday | 75°F | Mostly Sunny | 3 mph SW | 3% |
| Thursday Night | 47°F | Partly Cloudy | 2 mph N | 8% |
| Friday | 71°F | Partly Sunny then Slight Chance Rain Showers | 1 to 5 mph SW | 15% |
| Friday Night | 44°F | Slight Chance Rain Showers then Mostly Cloudy | 3 mph SW | 15% |
Forecast source: National Weather Service (api.weather.gov) for Colfax (46.902, -117.345). Updated through the day.
Growing snapshot for Colfax
Last spring frost
Apr 29
First fall frost
Oct 4
Growing season
161 days
Hardiness zone
6b
More local growing data for Colfax: nearby ZIP 99174 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, St John, Wa (12.4 mi from Colfax). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.