WorkWindow

Driveway Sealing Weather in Washington: Best Months by City

Driveway Sealing season in Washington, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Seattle leads with 107 workable days a year; Marysville runs the shortest at 0.

Across Washington's 20 listed cities, annual workable days for driveway sealing run from 0 (Marysville) up to 107 (Seattle). 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, 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 driveway sealing guide.

Cities in Washington

Peak months and season boundaries from NOAA 1991–2020 normals; season = months with at least 8 workable days.
CityPeak monthsSeasonWorkable days/yr
Seattle Jul, Aug, Jun May–September 107
Spokane Aug, Jul, Jun June–August 71
Kennewick Jun, Sep, May May–September 84
Bremerton Aug, Jul, Jun June–September 82
Tacoma Aug, Jul, Sep June–September 107
Olympia Jul, Aug July–August 39
Vancouver Aug, Jul, Sep June–September 107
Marysville — no month clears the 8-workable-day bar 0
Bellevue Jul, Aug, Jun June–September 102
Yakima Aug, Jul, Jun June–August 38
Kent Aug, Jul, Jun June–September 101
Bellingham Aug, Jul, Jun June–September 78
Everett Jul, Aug, Jun June–September 83
Spokane Valley Aug, Jul, Jun June–August 71
Renton Jul, Aug, Jun June–September 102
Federal Way Aug, Jul, Sep June–September 107
Kirkland Aug, Jul, Sep June–September 96
Auburn Aug, Jul, Jun June–September 101
Wenatchee Jun, Aug, Sep May–September 94
Pasco Jun, Aug, Sep June–June 50

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 Washington

More