Mossyrock, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mossyrock, a city in Lewis County, Washington.
Overnight
39°F
Mostly Clear
Mostly clear, with a low around 39. Southeast wind around 2 mph.
7-day forecast for Mossyrock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 39°F | Mostly Clear | 2 mph SE | 2% |
| Wednesday | 58°F | Partly Sunny then Light Rain Likely | 5 mph SSE | 61% |
| Wednesday Night | 44°F | Light Rain | 3 to 8 mph S | 91% |
| Thursday | 56°F | Chance Light Rain then Partly Sunny | 3 mph SSW | 30% |
| Thursday Night | 42°F | Mostly Cloudy then Light Rain Likely | 1 to 6 mph NE | 55% |
| Friday | 56°F | Light Rain Likely | 1 to 9 mph SE | 74% |
| Friday Night | 45°F | Light Rain Likely | 1 to 5 mph ESE | 65% |
| Saturday | 64°F | Partly Sunny then Slight Chance Light Rain | 1 to 6 mph SE | 24% |
| Saturday Night | 46°F | Light Rain | 1 to 12 mph S | 80% |
| Sunday | 56°F | Light Rain Likely | 0 to 7 mph SSW | 67% |
| Sunday Night | 40°F | Slight Chance Light Rain | 0 to 3 mph NE | 16% |
| Monday | 57°F | Chance Light Rain | 0 to 5 mph SE | 38% |
| Monday Night | 44°F | Chance Light Rain | 0 to 8 mph SSE | 48% |
| Tuesday | 59°F | Chance Light Rain | 2 to 10 mph SSE | 50% |
Forecast source: National Weather Service (api.weather.gov) for Mossyrock (46.530, -122.489). Updated through the day.
Growing snapshot for Mossyrock
Last spring frost
Apr 7
First fall frost
Nov 13
Growing season
215 days
Hardiness zone
8b
More local growing data for Mossyrock: nearby ZIP 98585 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Ashford
Centralia
Chehalis
Fords Prairie
Grand Mound
Morton
Napavine
Onalaska
Packwood
Pe Ell
Toledo
Vader
Winlock
Climate data from the nearest NOAA station, Mayfield Pwr Plt, Wa (8.6 mi from Mossyrock). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.