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Driveway Sealing Weather in Colorado: Best Months by City

Driveway Sealing season in Colorado, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Lakewood leads with 72 workable days a year; Longmont runs the shortest at 43.

Colorado is not one climate: Lakewood banks 72 workable driveway sealing days a year while Longmont gets 43 — 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 (55–90°F, nights 50°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 driveway sealing guide.

Cities in Colorado

Peak months and season boundaries from NOAA 1991–2020 normals; season = months with at least 8 workable days.
CityPeak monthsSeasonWorkable days/yr
Denver Aug, Jun, Sep August–September 56
Colorado Springs Aug, Jul, Jun June–September 65
Aurora Aug, Jun, Sep August–September 56
Fort Collins Aug, Jul, Jun June–August 69
Lakewood Jul, Aug, Jun June–September 72
Thornton Jun, Aug, Sep August–September 52
Grand Junction Sep, Jun, Aug August–September 46
Greeley Jun, Aug, Sep August–September 46
Arvada Aug, Jul, Jun June–August 61
Pueblo Jun, Sep, Aug August–September 49
Boulder Aug, Jul, Jun June–August 62
Westminster Jun, Aug, Sep August–September 52
Centennial Aug, Jul, Jun June–September 69
Longmont Aug, Jun, Sep June–June 43
Highlands Ranch Aug, Jul, Jun June–September 69
Lafayette Jun, Aug, Sep August–September 52
Castle Rock Jul, Aug, Jun June–August 62

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 Colorado

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