Ahtanum, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ahtanum, a community in Yakima County, Washington.
Today
52°F
Areas Of Fog then Mostly Sunny
Areas of fog before 10am. Mostly sunny. High near 52, with temperatures falling to around 48 in the afternoon. Southeast wind 1 to 5 mph.
7-day forecast for Ahtanum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Areas Of Fog then Mostly Sunny | 1 to 5 mph SE | 3% |
| Tonight | 36°F | Chance Rain Showers then Areas Of Fog | 1 mph NW | 27% |
| Thursday | 57°F | Areas Of Fog then Sunny | 3 mph N | 0% |
| Thursday Night | 33°F | Mostly Cloudy | 2 mph N | 3% |
| Friday | 53°F | Chance Rain Showers | 1 mph E | 27% |
| Friday Night | 36°F | Chance Rain Showers then Mostly Cloudy | 2 mph N | 27% |
| Saturday | 57°F | Mostly Sunny | 1 mph E | 2% |
| Saturday Night | 37°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph NW | 15% |
| Sunday | 59°F | Slight Chance Rain Showers then Partly Sunny | 0 to 5 mph W | 15% |
| Sunday Night | 34°F | Mostly Cloudy | 3 mph NW | 1% |
| Monday | 56°F | Partly Sunny | 2 mph NE | 7% |
| Monday Night | 34°F | Partly Cloudy then Chance Rain Showers | 1 mph NE | 25% |
| Tuesday | 57°F | Chance Rain Showers | 2 mph E | 29% |
| Tuesday Night | 37°F | Chance Rain Showers | 2 mph NW | 29% |
Forecast source: National Weather Service (api.weather.gov) for Ahtanum (46.557, -120.614). Updated through the day.
Growing snapshot for Ahtanum
Last spring frost
Apr 8
First fall frost
Oct 23
Growing season
196 days
Hardiness zone
7a
More local growing data for Ahtanum: nearby ZIP 98902 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Yakima #2, Wa (1.8 mi from Ahtanum). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.