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Driveway Sealing Weather in Oregon: Best Months by City

Driveway Sealing season in Oregon, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Portland leads with 112 workable days a year; Bend runs the shortest at 13.

Across Oregon's 8 listed cities, annual workable days for driveway sealing run from 13 (Bend) up to 112 (Portland). Every number comes from NOAA 1991–2020 normals scored against the same label ruleset; every city name links to its live 10-day check.

Statewide, July 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 driveway sealing 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 May–September 112
Eugene Aug, Jul, Sep July–August 58
Salem Jul, Aug, Jun June–September 87
Medford Jun, Sep, Aug August–September 59
Bend Jul, Aug July–July 13
Gresham Aug, Jul, Jun June–September 101
Hillsboro Jul, Aug, Jun July–August 57
Beaverton Aug, Jul, Jun June–September 101

The rules behind these numbers

Typical label thresholds for driveway sealing — the single ruleset used by every check on this page.
CheckThresholdWhy it matters
Air temperature 55–90°F, and rising Sealer wants 55°F and rising — pavement must be warm enough to cure the emulsion.
Overnight low ≥50°F during the first 24 h The first 24 hours of cure need overnight lows of 50°F or better.
Dry before ≤0.05" rain in the prior 24 h Asphalt must be fully dry; sealer will not bond to damp pavement.
Dry after <0.05" rain for 36 h after (48 h cool or shaded driveways want 48 h) Most sealers list 24–48 dry hours; this site checks 36.
Evening dew-point spread ≥5°F from 6–11 pm Heavy evening dew can blush an uncured sealcoat.
Daytime humidity ≤85% Water-based sealer dries by evaporation; humid air stalls it.
Wind ≤20 mph (dust and debris in wet sealer up to 28 mph) Strong wind drops leaves and grit into the wet coat.

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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