Montesano, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Montesano, a city in Grays Harbor County, Washington.
Tonight
49°F
Mostly Cloudy
Mostly cloudy, with a low around 49. West wind around 1 mph.
7-day forecast for Montesano
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Cloudy | 1 mph W | 0% |
| Saturday | 72°F | Partly Sunny | 0 to 3 mph W | 1% |
| Saturday Night | 48°F | Mostly Cloudy | 0 to 3 mph WNW | 0% |
| Sunday | 74°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 1 to 5 mph W | 0% |
| Monday | 72°F | Partly Sunny | 1 to 6 mph W | 0% |
| Monday Night | 48°F | Partly Cloudy | 0 to 6 mph WNW | 0% |
| Tuesday | 69°F | Partly Sunny | 0 to 7 mph NW | 1% |
| Tuesday Night | 48°F | Mostly Cloudy | 0 to 7 mph WNW | 3% |
| Wednesday | 69°F | Partly Sunny | 2 mph NW | 4% |
| Wednesday Night | 49°F | Mostly Cloudy | 2 mph NE | 10% |
| Thursday | 70°F | Partly Sunny then Slight Chance Light Rain | 3 mph E | 15% |
| Thursday Night | 49°F | Chance Light Rain | 3 mph WSW | 26% |
| Friday | 66°F | Slight Chance Light Rain | 5 mph WSW | 24% |
Forecast source: National Weather Service (api.weather.gov) for Montesano (47.015, -123.586). Updated through the day.
Growing snapshot for Montesano
Last spring frost
May 1
First fall frost
Oct 14
Growing season
169 days
Hardiness zone
8b
More local growing data for Montesano: nearby ZIP 98583 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Elma, Wa (4.1 mi from Montesano). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.