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Concrete Pouring Weather in Washington: Best Months by City

Concrete Pouring season in Washington, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Tacoma leads with 165 workable days a year; Marysville runs the shortest at 97.

Across Washington's 20 listed cities, annual workable days for concrete pouring run from 97 (Marysville) up to 165 (Tacoma). 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 concrete pouring 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 April–October 159
Spokane Aug, Jul, Sep May–September 127
Kennewick Sep, Jun, May April–October 140
Bremerton Aug, Jul, Sep April–October 139
Tacoma Aug, Jul, Sep April–October 165
Olympia Jul, Aug, Jun May–October 125
Vancouver Aug, Jul, Sep April–November 160
Marysville Aug, Jul, Jun May–September 97
Bellevue Jul, Aug, Jun April–October 158
Yakima Sep, Jun, May May–September 107
Kent Aug, Jul, Sep April–October 157
Bellingham Aug, Jul, Sep April–October 145
Everett Jul, Aug, Jun April–October 137
Spokane Valley Aug, Jul, Sep May–September 127
Renton Jul, Aug, Jun April–October 158
Federal Way Aug, Jul, Sep April–October 165
Kirkland Aug, Jul, Sep April–November 153
Auburn Aug, Jul, Sep April–October 157
Wenatchee Sep, Jun, May April–October 145
Pasco Sep, Jun, May August–October 104

The rules behind these numbers

Typical label thresholds for concrete pouring — the single ruleset used by every check on this page.
CheckThresholdWhy it matters
Air temperature 40–90°F — ideal 50–85°F DIY pours work from 40–90°F; 50–85°F is the sweet spot.
Overnight low ≥40°F during the first 48 h A low under 40°F inside the first 48 hours puts you in cold-weather concreting — not a DIY window.
Dry before no soaking (≥1.0") in the prior 24 h Rain before the pour only matters if the ground is soaked or standing in water.
Dry after <0.1" rain for 6 h after (12 h light rain after finishing still risks surface marks) A downpour in the first 6 hours can wash the surface; after final set, rain actually helps curing.
Wind ≤20 mph (rapid surface drying up to 28 mph) Hot wind pulls bleed water out faster than the slab can handle.

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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