Bonney Lake, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bonney Lake, a city in Pierce County, Washington.
This Afternoon
58°F
Chance Light Rain
A chance of rain after 4pm. Mostly cloudy. High near 58, with temperatures falling to around 54 in the afternoon. Southwest wind around 1 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Bonney Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Chance Light Rain | 1 mph SW | 31% |
| Tonight | 46°F | Light Rain | 1 to 7 mph S | 95% |
| Thursday | 57°F | Partly Sunny | 1 to 5 mph SW | 9% |
| Thursday Night | 42°F | Mostly Cloudy then Chance Rain And Snow | 3 mph SSE | 32% |
| Friday | 55°F | Light Rain | 2 mph SSE | 88% |
| Friday Night | 47°F | Light Rain Likely | 2 mph SE | 72% |
| Saturday | 63°F | Mostly Cloudy then Chance Light Rain | 2 mph ESE | 25% |
| Saturday Night | 48°F | Light Rain | 0 to 10 mph S | 86% |
| Sunday | 54°F | Light Rain | 1 to 9 mph SSW | 78% |
| Sunday Night | 39°F | Mostly Cloudy | 2 mph SE | 13% |
| Monday | 55°F | Partly Sunny then Slight Chance Light Rain | 1 mph ESE | 18% |
| Monday Night | 44°F | Light Rain Likely | 0 to 6 mph SSE | 55% |
| Tuesday | 57°F | Light Rain Likely | 2 to 6 mph S | 63% |
| Tuesday Night | 47°F | Light Rain Likely | 5 mph SSE | 62% |
Forecast source: National Weather Service (api.weather.gov) for Bonney Lake (47.200, -122.163). Updated through the day.
Growing snapshot for Bonney Lake
Last spring frost
Apr 11
First fall frost
Oct 30
Growing season
202 days
Hardiness zone
8b
More local growing data for Bonney Lake: nearby ZIP 98391 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Mcmillin Rsvr, Wa (5.1 mi from Bonney Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.