Bonney Lake, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bonney Lake, a city in Pierce County, Washington.
Tonight
50°F
Partly Cloudy then Patchy Fog
Patchy fog after 1am. Partly cloudy, with a low around 50. Wind around 0 mph.
7-day forecast for Bonney Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Partly Cloudy then Patchy Fog | 0 mph | 0% |
| Sunday | 73°F | Patchy Fog then Mostly Sunny | 2 mph NNW | 0% |
| Sunday Night | 50°F | Mostly Clear then Patchy Fog | 1 mph NNW | 0% |
| Monday | 71°F | Areas Of Fog then Mostly Cloudy | 1 mph NNW | 0% |
| Monday Night | 50°F | Partly Cloudy | 1 mph SE | 1% |
| Tuesday | 68°F | Partly Sunny | 1 mph SW | 1% |
| Tuesday Night | 48°F | Mostly Cloudy | 3 mph SSW | 3% |
| Wednesday | 66°F | Partly Sunny | 2 mph SW | 7% |
| Wednesday Night | 47°F | Mostly Cloudy | 1 mph NE | 7% |
| Thursday | 63°F | Mostly Cloudy then Slight Chance Light Rain | 2 mph NNW | 21% |
| Thursday Night | 48°F | Chance Light Rain | 1 mph NE | 44% |
| Friday | 61°F | Chance Light Rain | 2 mph SSW | 48% |
| Friday Night | 45°F | Chance Light Rain | 2 mph SSW | 39% |
| Saturday | 62°F | Partly Sunny | 2 mph WSW | 11% |
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.