St. John, WA Weather & Growing Conditions
Overnight
49°F
Mostly Clear
Mostly clear, with a low around 49. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Clear | 0 mph | 0% |
| Saturday | 79°F | Sunny | 0 to 3 mph SW | 0% |
| Saturday Night | 50°F | Mostly Clear | 2 mph S | 0% |
| Sunday | 83°F | Sunny | 3 mph SE | 0% |
| Sunday Night | 51°F | Mostly Clear | 2 mph E | 0% |
| Monday | 83°F | Sunny | 5 mph S | 0% |
| Monday Night | 52°F | Partly Cloudy | 0 to 3 mph S | 0% |
| Tuesday | 80°F | Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 5 mph SW | 1% |
| Wednesday | 76°F | Mostly Sunny | 2 to 6 mph SW | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 5 mph S | 2% |
| Thursday | 76°F | Mostly Sunny | 3 mph SW | 3% |
| Thursday Night | 48°F | Mostly Cloudy | 3 mph NE | 7% |
| Friday | 72°F | Partly Sunny | 5 mph S | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. John, WA
Last spring frost
Apr 29
First fall frost
Oct 4
Growing season
161 days
Hardiness zone
6b
Explore more for St. John, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, St John, Wa (3.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.