Sisco Heights, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sisco Heights, a community in Snohomish County, Washington.
This Afternoon
73°F
Mostly Sunny
Mostly sunny, with a high near 73. West northwest wind around 3 mph.
7-day forecast for Sisco Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 3 mph WNW | 0% |
| Tonight | 49°F | Mostly Clear | 3 mph NNW | 0% |
| Sunday | 72°F | Mostly Sunny | 1 to 5 mph NNW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 3 mph NNW | 0% |
| Monday | 71°F | Partly Sunny | 1 to 5 mph N | 0% |
| Monday Night | 49°F | Partly Cloudy | 1 to 5 mph NNW | 0% |
| Tuesday | 68°F | Partly Sunny | 3 mph NNW | 1% |
| Tuesday Night | 48°F | Mostly Cloudy | 3 mph NNE | 13% |
| Wednesday | 67°F | Partly Sunny | 3 mph S | 13% |
| Wednesday Night | 47°F | Mostly Cloudy | 3 mph NNW | 11% |
| Thursday | 64°F | Mostly Cloudy then Slight Chance Light Rain | 1 to 6 mph NNE | 17% |
| Thursday Night | 47°F | Slight Chance Light Rain | 2 to 6 mph NW | 18% |
| Friday | 64°F | Slight Chance Light Rain | 5 mph NW | 18% |
| Friday Night | 45°F | Slight Chance Light Rain | 5 mph NNE | 20% |
Forecast source: National Weather Service (api.weather.gov) for Sisco Heights (48.118, -122.110). Updated through the day.
Growing snapshot for Sisco Heights
Last spring frost
Mar 24
First fall frost
Nov 2
Growing season
223 days
Hardiness zone
8b
More local growing data for Sisco Heights: nearby ZIP 98270 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Alderwood Manor
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Bothell East
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Eastmont
Edmonds
Esperance
Everett
Fobes Hill
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Granite Falls
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Lake Bosworth
Lake Cassidy
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Lake Roesiger
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Lake Stickney
Larch Way
Climate data from the nearest NOAA station, Everett, Wa (6 mi from Sisco Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.