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Deck Staining · state guide

Deck Staining Weather in Illinois: Best Months by City

Deck Staining season in Illinois, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Alton leads with 160 workable days a year; Waukegan runs the shortest at 110.

15 Illinois cities, ranked by season

Across Illinois's 15 listed cities, annual workable days for deck staining run from 110 (Waukegan) up to 160 (Alton). 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 deck staining guide.

Chasing the season across state lines? Step back to Deck Staining in Idaho or push on to Deck Staining in Indiana.

Cities in Illinois

Peak months and season boundaries from NOAA 1991–2020 normals; season = months with at least 8 workable days.
CityPeak monthsSeasonWorkable days/yr
Chicago Aug, Jul, Sep April–October 133
Rockford Aug, Jul, Sep May–October 123
Round Lake Beach Aug, Jul, Sep May–October 124
Peoria Aug, Sep, Jul April–October 137
Aurora Aug, Jul, Sep May–October 127
Springfield Aug, Sep, Jul April–October 133
Champaign Aug, Sep, Jul April–October 130
Naperville Aug, Jul, Sep May–October 129
Joliet Aug, Sep, Jul May–October 128
Bloomington Jul, Aug, Sep May–October 126
Elgin Aug, Jul, Sep May–October 116
Waukegan Jul, Aug, Sep May–October 110
Cicero Aug, Jul, Sep April–October 133
Alton Aug, Jul, Sep April–October 160
Decatur Aug, Sep, Jul April–October 141

Top 10 Illinois calendars for deck staining

The rules behind these numbers

Typical label thresholds for deck staining — the single ruleset used by every check on this page.
CheckThresholdWhy it matters
Air temperature 50–90°F Air temperature while applying and for the first hours of dry time.
Overnight low ≥40°F during the first 24 h Overnight low during the cure window.
Dry before ≤0.05" rain in the prior 24 h; watch back to 48 h Wood must dry out after rain before it can absorb stain.
Dry after <0.05" rain for 24 h after (48 h oil-based formulas want 48 h dry) Water-based stains need roughly 24 dry hours; oil-based closer to 48.
Evening dew-point spread ≥5°F from 6–11 pm Temperature minus dew point from 6 pm to 11 pm. A small spread means dew will settle on fresh stain.
Daytime humidity ≤85% Daytime relative humidity slows dry time.
Wind ≤15 mph (brush or pad only up to 20 mph) Above 15 mph, spraying drifts; above 20 mph, dust and debris land in wet stain.

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

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