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Exterior Painting Weather in Oregon: Best Months by City

Exterior Painting season in Oregon, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Beaverton leads with 179 workable days a year; Bend runs the shortest at 103.

Oregon is not one climate: Beaverton banks 179 workable exterior painting days a year while Bend gets 103 — a spread the table below itemizes month by month. Season boundaries mark the first and last month averaging 8+ workable days against the label rules (50–90°F, nights 35°F+).

Statewide, August is the strongest month — it tops or ties the table in most listed cities. The live strips on each city page decide the week; this table decides the month. Scoring rules: methodology; the national playbook: the exterior painting guide.

Cities in Oregon

Peak months and season boundaries from NOAA 1991–2020 normals; season = months with at least 8 workable days.
CityPeak monthsSeasonWorkable days/yr
Portland Aug, Jul, Sep March–November 171
Eugene Aug, Jul, Sep May–October 146
Salem Jul, Aug, Sep April–October 155
Medford Sep, Jun, May April–June 123
Bend Aug, Jul, Jun June–September 103
Gresham Aug, Jul, Sep April–November 160
Hillsboro Jul, Aug, Sep May–October 132
Beaverton Aug, Jul, Sep February–November 179

The rules behind these numbers

Typical label thresholds for exterior painting — the single ruleset used by every check on this page.
CheckThresholdWhy it matters
Air temperature 50–90°F (low-temp formulas from 35°F) Standard latex wants 50°F+. Some low-temperature formulas are rated down to 35°F.
Overnight low ≥35°F during the first 24 h (≥40°F preferred) Paint keeps curing overnight; a low under 40°F stalls standard latex.
Dry before ≤0.05" rain in the prior 12 h; watch back to 24 h The surface must be dry to the touch and out of a recent soak.
Dry after <0.05" rain for 24 h after Rain inside the first 24 hours can streak or wash fresh paint.
Evening dew-point spread ≥5°F from 6–11 pm Surface should stay at least 5°F above the dew point; dew flat-spots fresh paint.
Daytime humidity ≤80% High humidity extends recoat and cure times.
Wind ≤15 mph (brush only up to 20 mph) Wind dries the leading edge too fast and carries overspray.

Always follow your product label — formulas vary. The table above is the typical range across major manufacturers, not a promise about your can.

Other tasks in Oregon

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