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
72°F
Sunny
Sunny. High near 72, with temperatures falling to around 70 in the afternoon. North northwest wind around 1 mph.
7-day forecast for Bonney Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Sunny | 1 mph NNW | 0% |
| Tonight | 50°F | Mostly Clear | 1 mph N | 0% |
| Sunday | 73°F | Mostly Sunny | 1 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 1 mph N | 0% |
| Monday | 71°F | Partly Sunny | 1 mph NW | 0% |
| Monday Night | 50°F | Partly Cloudy | 1 mph E | 0% |
| Tuesday | 68°F | Mostly Cloudy | 1 mph WSW | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 2 mph SSW | 3% |
| Wednesday | 66°F | Partly Sunny | 1 mph SW | 8% |
| Wednesday Night | 48°F | Mostly Cloudy | 1 mph SW | 8% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 2 mph N | 16% |
| Thursday Night | 47°F | Slight Chance Light Rain | 2 mph N | 19% |
| Friday | 62°F | Slight Chance Light Rain | 0 to 3 mph NE | 23% |
| Friday Night | 45°F | Slight Chance Light Rain then Partly Cloudy | 2 mph ENE | 18% |
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 Sep 20, 2026.