Will School Be Closed in Portland, Oregon?
Real-time probability that schools in Portland, Oregon will be cancelled tomorrow, based on live forecast data and local closure thresholds.
Analysis Summary
“No significant snowfall is forecast.”
Risk Factor Breakdown
Weather Data
Temperature
12°C
53°F
Snowfall
0.0cm
next 24h
Precipitation
3.7mm
total
Wind
9 km/h
6 mph
FAQ — Portland, Oregon
Will there be a snow day in Portland, Oregon tomorrow?
SnowSense™ currently shows a 0% snow day probability for Portland, Oregon. Status: Unlikely. No significant snowfall is forecast.
How much snow is forecast for Portland, Oregon?
Our model shows 0.0mm of snowfall forecast for the next 24 hours in Portland, Oregon, with temperatures around 12°C.
How accurate is the SnowSense snow day calculator?
SnowSense™ uses live Open-Meteo forecast data — aggregating NOAA (HRRR/GFS) and ECMWF models — with regional tolerance modifiers and storm timing analysis. Our confidence score reflects how decisively the conditions point toward (or away from) a closure.
Typical closure threshold
1–3 inches of accumulation (rare event)
Portland rarely sees snow at all — but when it does, it closes schools quickly. Pacific-northwest cities have minimal winter infrastructure because snow events happen maybe once or twice per year. Add the region's steep terrain and the mild-but-near-freezing temperatures (which produce ice rather than plowable snow), and even an inch of accumulation can shut down an entire district.
Why Portland closes for small events
Portland's hilly topography — unusual for a west-coast US city — is the biggest factor. Ice on steep urban streets makes school-bus routes impassable even when downtown and freeway conditions are fine. Parents living above 500 feet of elevation face completely different conditions than those closer to sea level, which complicates the district-wide decision.
The region's climatological "sweet spot" for winter misery is 32–35°F with precipitation — a range where rain, sleet, snow, and ice are all possible in the same storm. Forecasters struggle to pin down the precipitation type, and districts err on the side of closure when the overnight temperature is forecast anywhere near freezing with moisture incoming.
Typical winter in Portland
Portland averages 4 inches of snow per year — most years, one or two small events. Schools typically close 0–2 times per winter, but when they close it's usually multiple consecutive days while conditions thaw.
- Seasonal snowfall: 4 inches
- Primary closure trigger: 1–2 inches + overnight freezing temperatures
- Hilly terrain amplifies the impact of even small accumulations
- Ice events are more common than pure snow events
Pacific-northwest snow forecasting is uniquely error-prone — SnowSense™ weights ensemble uncertainty heavily in Portland's probability score. Live updates every 30 minutes.
Oregon · 256 words of Portland-specific context
High-Intent Local Detail
Why schools in Portland close when they do
This page goes deeper on the local thresholds, official district sources, recent winter events, and the nearby cities that make a different call.
Local threshold
1–3 inches of accumulation (rare event)
Portland rarely sees snow at all — but when it does, it closes schools quickly. Pacific-northwest cities have minimal winter infrastructure because snow events happen maybe once or twice per year. Add the region's steep terrain and the mild-but-near-freezing temperatures (which produce ice rather than plowable snow), and even an inch of accumulation can shut down an entire district.
Official districts
Forecast pages and district websites
Portland Public Schools
45,000 students · city
Nearby city contrast
Why nearby places may decide differently
Portland can wait longer on borderline calls than Beaverton
Portland runs a much larger urban operation, so transit dependencies, staffing, and the downstream cost of closure all push decision-makers to hold off unless the forecast clearly threatens the morning commute.
Portland can wait longer on borderline calls than Vancouver
Portland runs a much larger urban operation, so transit dependencies, staffing, and the downstream cost of closure all push decision-makers to hold off unless the forecast clearly threatens the morning commute.
Portland can wait longer on borderline calls than Gresham
Portland runs a much larger urban operation, so transit dependencies, staffing, and the downstream cost of closure all push decision-makers to hold off unless the forecast clearly threatens the morning commute.
Portland, Oregon school district
Per-district snow day probability
Nearby cities
Live forecasts within driving distance of Portland
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