Asphalt & paving · Guide
When to pave: season, temperature and cure time
Hot mix has a working window measured in minutes and a season measured in months. Getting both right is free; getting them wrong is not repairable.
5 min read · Updated August 2026
The temperature rules
Hot mix leaves the plant at 275-300°F and must be compacted before it drops below about 185°F. Ground and air temperature control how fast that happens. The practical floor is 50°F and rising for surface courses, and most crews will not lay a thin lift below that.
Thin mats cool fastest. A 1.5-inch surface course in 45°F weather with wind can lose its working temperature before the roller finishes, which leaves a permeable, under-compacted mat that ravels within two seasons.
Season windows by region
Asphalt plants shut down when demand and temperature drop, which sets the season more firmly than the weather itself. In the northern tier, plants typically run mid-April to late October. The mid-Atlantic and Midwest stretch from March to November. In the South and Southwest, paving is year-round with summer heat as the only real constraint.
The best residential slot in a cold climate is late spring through early autumn — warm ground, full plant availability, and enough remaining season for the mat to cure before the first freeze.
Cure time and early care
Asphalt is drivable within 24-72 hours but continues hardening for 6-12 months as volatiles leave the binder. During the first summer it will soften in direct heat — point sharp loads like trailer jacks, kickstands and jack stands onto a plywood pad.
Do not sealcoat until at least one full season has passed. Sealing green asphalt traps oils and produces a soft surface that scuffs under turning tyres.
When cold patch is the right answer
Cold patch is a stopgap, not a paving material. It is the correct choice for a pothole in February when hot mix is unavailable — it stays workable at low temperature and can be compacted by hand or by driving over it.
Plan on replacing a cold patch repair with a proper hot mix patch in the next paving season. Left permanently, it stays porous and lets water into the base under the repair.
Frequently asked questions
+What is the minimum temperature for laying asphalt?
50°F and rising for a surface course, with ground temperature above about 40°F. Thicker binder courses can go slightly cooler because they hold heat longer.
+Can you pave in the rain?
No. Water cools the mat instantly and prevents bonding to the base. Light drizzle on a warm surface is sometimes tolerated for thick lifts, but any standing water stops the job.
Part of a series
The complete asphalt driveway guide
Everything that decides what an asphalt driveway costs and how long it lasts — written from the numbers a paving crew works to, not from a brochure.