The ideal temperature for sealing a driveway is 45 degrees Fahrenheit or warmer. For best results, it is important to avoid sealing a driveway when it is cold outside.
Professionals recommend sealing a driveway when the weather forecast is not calling for rain for at least three days after the anticipated finish of the project. Ideally, the asphalt is damp during the sealing process, so humidity levels are unimportant. Experts recommend waiting to seal the driveway around 90 days after installation, preferably when the weather is warm. Waiting ensures that the asphalt hardens prior to sealing, although people who live in dry, hot climates need to wait only 30 days.