Skip to main content

Fog in Iowa

It was 8:22 p.m. on July 22 in Decorah, Iowa, in the summer of 2023. The temperature hovered around 70 degrees. We were driving and as we were coming over a hill, we observed fog at the bottom of the hill.

Decorah, Iowa July 22, 2023 8:22 p.m.

Driving Question

  • Why and when do we see fog?

Probing Questions

  • What causes fog to form?
  • How does temperature affect when we see fog in different environments?
  • How does the time of day affect when we see fog?
  • What are some land features that are commonly found near fog?

Classroom Activities

Students could:

  • Create fog in a jar by pouring hot water into a clear jar, adding a few ice cubes, and then placing a lid on top. As the warm air cools down, you'll see fog forming inside the jar.
  • Go outside on a foggy day and observe the fog firsthand. Encourage them to describe what they see, feel, and hear.
  • Demonstrate the concept of how fog is formed by placing a cold can/glass in a warm space. The moisture in the air will condense on the cold surface, creating a layer of “fog” on the can/glass.


Iowa Core Alignment


Obtain and combine information to describe climates in different regions of the world

Credit Info

Submitted by Brittany Ligenfelter and Bri Lingenfelter.

REAPCorporation for Public BroadcastingAlliant EnergyMusco Lighting Pella