St. John, WA Weather & Growing Conditions
This Afternoon
54°F
Mostly Cloudy
Mostly cloudy. High near 54, with temperatures falling to around 49 in the afternoon. Northeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Mostly Cloudy | 2 mph NE | 3% |
| Tonight | 34°F | Mostly Cloudy | 2 mph E | 3% |
| Wednesday | 52°F | Patchy Fog then Sunny | 2 mph S | 2% |
| Wednesday Night | 37°F | Rain Showers Likely | 3 mph SE | 64% |
| Thursday | 52°F | Rain Showers Likely then Mostly Cloudy | 3 to 9 mph SW | 64% |
| Thursday Night | 38°F | Partly Cloudy | 5 mph SE | 4% |
| Friday | 55°F | Mostly Cloudy | 7 mph S | 8% |
| Friday Night | 40°F | Mostly Cloudy | 6 mph SE | 4% |
| Saturday | 62°F | Partly Sunny | 3 to 7 mph SE | 4% |
| Saturday Night | 43°F | Mostly Cloudy then Slight Chance Rain Showers | 3 to 7 mph SE | 21% |
| Sunday | 58°F | Slight Chance Rain Showers | 6 to 10 mph SW | 22% |
| Sunday Night | 39°F | Mostly Cloudy | 6 mph S | 12% |
| Monday | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 6 mph SE | 18% |
| Monday Night | 40°F | Slight Chance Rain Showers | 5 mph S | 20% |
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 Nov 4, 2026.