Why Tonight’s Clear Skies Will Bring One of the Coldest Lows of the Week

After a sunny November day with temperatures reaching the lower 60s, Rowan County is heading for one of the coldest nights of the week. Tonight’s lows are expected to drop to around 32 degrees, thanks to an ideal setup for strong radiational cooling.

What Is Radiational Cooling?

Radiational cooling happens when heat from the ground escapes back into the atmosphere after sunset. On nights like tonight — when conditions are clear, calm, and dry — there’s nothing in the sky or air to slow that process down. The ground loses heat quickly, and temperatures follow.

Why Tonight Is Perfect for a Cold Drop

Several ingredients are lining up over Rowan County:

• Clear Skies: With no cloud cover to act like a blanket, heat escapes straight into space.

• Light Winds: Calm air lets cold air settle instead of mixing with warmer air aloft.

• Very Dry Air: Low humidity (even dipping below 25% today) allows heat to radiate away faster.

• High Pressure Overhead: A stable atmosphere helps temperatures fall quickly after dark.

These conditions will push temperatures to the freezing mark, and some rural or low-lying areas may dip a couple of degrees colder.

What This Means for You

• Frost is likely tonight and early Tuesday morning. Sensitive plants should be covered or brought inside.

• Car windshields may need scraping early tomorrow.

• Heating systems may kick on more often, especially after midnight.

• Pets should be brought indoors, and outdoor water bowls may freeze at the surface.

Looking Ahead

Temperatures begin to moderate Tuesday, and by Wednesday we’ll be back into the mid-70s thanks to warm southwest flow returning to the area. Tonight’s chill will be the coldest part of the week before a noticeable warm-up arrives.