Concrete Pouring Weather in Hawaii: Best Months by City
Concrete Pouring season in Hawaii, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Kailua leads with 196 workable days a year; Honolulu runs the shortest at 83.
Hawaii is not one climate: Kailua banks 196 workable concrete pouring days a year while Honolulu gets 83 — 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 (40–90°F, nights 40°F+).
If one month anchors the Hawaii calendar it's January, the statewide leader in workable days. Use this page to pick the month, then the city page's 10-day strip to pick the days — and the national concrete pouring guide for the physics behind each rule.
Cities in Hawaii
| City | Peak months | Season | Workable days/yr |
|---|---|---|---|
| Honolulu | Jan, Feb, Mar | December–March | 83 |
| Kailua | May, Jun, Aug | year-round | 196 |
The rules behind these numbers
| Check | Threshold | Why 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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