Hamilton, WA Weather & Growing Conditions
Today
85°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 85. North wind 0 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Patchy Smoke | 0 to 8 mph N | 0% |
| Tonight | 59°F | Patchy Smoke | 2 to 6 mph S | 0% |
| Wednesday | 89°F | Areas Of Smoke | 2 to 7 mph N | 0% |
| Wednesday Night | 61°F | Clear | 2 to 6 mph N | 0% |
| Thursday | 89°F | Sunny | 2 to 7 mph S | 0% |
| Thursday Night | 61°F | Mostly Clear | 1 to 7 mph SE | 0% |
| Friday | 84°F | Sunny | 1 to 8 mph SSW | 0% |
| Friday Night | 58°F | Mostly Clear | 1 to 8 mph S | 0% |
| Saturday | 80°F | Sunny | 0 to 9 mph SSW | 0% |
| Saturday Night | 54°F | Mostly Clear | 1 to 8 mph SSW | 3% |
| Sunday | 76°F | Sunny | 1 to 8 mph SW | 3% |
| Sunday Night | 53°F | Mostly Clear | 0 to 8 mph NNW | 5% |
| Monday | 76°F | Sunny | 0 to 8 mph W | 5% |
| Monday Night | 54°F | Mostly Clear | 1 to 8 mph SE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hamilton, WA
Last spring frost
Mar 27
First fall frost
Nov 6
Growing season
224 days
Hardiness zone
8b
Explore more for Hamilton, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Sedro-Woolley, Wa (11.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.