Hartline, WA Weather & Growing Conditions
Overnight
34°F
Mostly Clear
Mostly clear, with a low around 34. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 34°F | Mostly Clear | 5 mph NE | 1% |
| Wednesday | 53°F | Sunny | 3 to 7 mph SE | 2% |
| Wednesday Night | 36°F | Chance Rain Showers | 5 mph E | 41% |
| Thursday | 54°F | Mostly Sunny | 5 mph S | 8% |
| Thursday Night | 36°F | Partly Cloudy | 7 mph SE | 7% |
| Friday | 53°F | Mostly Cloudy | 6 to 10 mph SE | 7% |
| Friday Night | 35°F | Mostly Cloudy | 5 to 8 mph SE | 9% |
| Saturday | 59°F | Partly Sunny | 6 to 10 mph E | 5% |
| Saturday Night | 37°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph SE | 15% |
| Sunday | 58°F | Slight Chance Rain Showers then Partly Sunny | 9 to 17 mph SW | 15% |
| Sunday Night | 35°F | Mostly Cloudy | 6 to 10 mph NW | 2% |
| Monday | 55°F | Partly Sunny then Slight Chance Rain Showers | 3 to 9 mph NE | 15% |
| Monday Night | 35°F | Slight Chance Rain Showers | 3 to 7 mph NE | 24% |
| Tuesday | 57°F | Slight Chance Rain Showers | 6 to 10 mph SE | 24% |
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 Nov 4, 2026.