Full transparency, I did not plan for a loose dev time/temperature experiment. I broke my long glass thermometer and had to guess at the developer temperature using a medical thermometer gun and an under tongue thermometer. Some of the results are below.
Images from a misty morning in August 2021. Includes a prime example of film getting stuck together due to a loader operator error (me) when loading the film onto the dev reel. Ilford FP4, Olympus om10.