Herron Island, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Herron Island, a community in Pierce County, Washington.
Today
55°F
Patchy Fog then Light Rain
Patchy fog before 10am, then rain. Mostly cloudy. High near 55, with temperatures falling to around 53 in the afternoon. South southwest wind 1 to 10 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Herron Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 55°F | Patchy Fog then Light Rain | 1 to 10 mph SSW | 86% |
| Tonight | 47°F | Light Rain | 10 to 18 mph SSW | 96% |
| Thursday | 55°F | Mostly Sunny | 8 to 14 mph SSW | 6% |
| Thursday Night | 46°F | Light Rain | 8 to 13 mph SSW | 87% |
| Friday | 53°F | Light Rain | 7 to 16 mph S | 87% |
| Friday Night | 48°F | Light Rain Likely | 2 to 7 mph S | 73% |
| Saturday | 59°F | Chance Light Rain | 5 mph SSW | 49% |
| Saturday Night | 49°F | Light Rain | 5 to 23 mph SSW | 83% |
| Sunday | 54°F | Light Rain Likely | 6 to 18 mph SSW | 63% |
| Sunday Night | 43°F | Slight Chance Light Rain | 1 to 6 mph SSW | 15% |
| Monday | 54°F | Chance Light Rain | 5 mph ESE | 44% |
| Monday Night | 47°F | Light Rain Likely | 5 to 15 mph S | 63% |
| Tuesday | 55°F | Light Rain Likely | 7 to 15 mph S | 63% |
| Tuesday Night | 48°F | Light Rain Likely | 7 mph S | 56% |
Forecast source: National Weather Service (api.weather.gov) for Herron Island (47.267, -122.832). Updated through the day.
Growing snapshot for Herron Island
Last spring frost
Mar 11
First fall frost
Nov 21
Growing season
254 days
Hardiness zone
8b
More local growing data for Herron Island: nearby ZIP 98394 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Tacoma Narrows Ap, Wa (10.7 mi from Herron Island). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.