Harman US

Hartline, WA Weather & Growing Conditions

This Afternoon
79°F
Sunny
Sunny, with a high near 79. South wind around 7 mph.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 79°F Sunny 7 mph S 0%
Tonight 52°F Mostly Clear 2 to 7 mph E 0%
Sunday 83°F Sunny 6 mph SE 0%
Sunday Night 53°F Mostly Clear 2 to 8 mph NE 0%
Monday 83°F Sunny 5 to 8 mph S 0%
Monday Night 54°F Partly Cloudy 3 to 8 mph W 0%
Tuesday 79°F Mostly Sunny 5 to 9 mph NW 0%
Tuesday Night 49°F Partly Cloudy 5 to 9 mph W 0%
Wednesday 72°F Mostly Sunny 5 to 12 mph SW 0%
Wednesday Night 48°F Partly Cloudy 6 to 12 mph W 1%
Thursday 69°F Partly Sunny 6 mph NW 5%
Thursday Night 48°F Mostly Cloudy 5 to 9 mph NW 8%
Friday 67°F Partly Sunny 12 mph NW 11%
Friday Night 45°F Mostly Cloudy 12 mph NW 11%

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 Sep 19, 2026.