Hartline, WA Weather & Growing Conditions
Today
88°F
Patchy Smoke
Patchy smoke. Sunny. High near 88, with temperatures falling to around 86 in the afternoon. North wind 5 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Patchy Smoke | 5 to 9 mph N | 0% |
| Tonight | 57°F | Patchy Smoke then Haze | 5 mph N | 0% |
| Wednesday | 94°F | Areas Of Smoke | 7 mph SE | 0% |
| Wednesday Night | 60°F | Areas Of Smoke then Mostly Clear | 3 to 7 mph S | 0% |
| Thursday | 98°F | Sunny | 5 to 9 mph S | 0% |
| Thursday Night | 63°F | Mostly Clear | 5 to 9 mph SW | 0% |
| Friday | 98°F | Sunny | 5 to 17 mph W | 0% |
| Friday Night | 62°F | Mostly Clear | 7 to 17 mph W | 0% |
| Saturday | 93°F | Sunny | 6 to 15 mph W | 0% |
| Saturday Night | 59°F | Mostly Clear | 9 to 15 mph W | 0% |
| Sunday | 89°F | Sunny | 10 mph W | 0% |
| Sunday Night | 57°F | Mostly Clear | 7 to 10 mph W | 0% |
| Monday | 88°F | Sunny | 6 to 9 mph W | 0% |
| Monday Night | 57°F | Mostly Clear | 9 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hartline, WA
Last spring frost
May 2
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
6b
Explore more for Hartline, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Hartline, Wa (2.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.