Ahtanum, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ahtanum, a community in Yakima County, Washington.
Overnight
52°F
Smoke
Smoke. Clear. Low around 52, with temperatures rising to around 55 overnight. Northwest wind around 3 mph.
7-day forecast for Ahtanum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Smoke | 3 mph NW | 0% |
| Tuesday | 88°F | Smoke | 2 to 6 mph E | 0% |
| Tuesday Night | 56°F | Areas Of Smoke | 3 mph W | 0% |
| Wednesday | 94°F | Areas Of Smoke | 5 mph E | 0% |
| Wednesday Night | 58°F | Areas Of Smoke then Clear | 1 to 6 mph NE | 0% |
| Thursday | 99°F | Sunny | 5 mph W | 0% |
| Thursday Night | 60°F | Clear | 5 to 9 mph NW | 0% |
| Friday | 97°F | Sunny | 1 to 14 mph NW | 0% |
| Friday Night | 59°F | Mostly Clear | 7 to 14 mph NW | 0% |
| Saturday | 93°F | Sunny | 2 to 9 mph W | 0% |
| Saturday Night | 56°F | Mostly Clear | 8 to 14 mph NW | 0% |
| Sunday | 89°F | Sunny | 2 to 8 mph N | 0% |
| Sunday Night | 54°F | Mostly Clear | 6 to 12 mph NW | 0% |
| Monday | 88°F | Sunny | 2 to 6 mph N | 0% |
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 Aug 4, 2026.