With the calendar nearly through March, the lengthening daylight, and warmer air temperatures, thoughts of leaving the winter season behind are certainly on the minds of most Iowans. Unfortunately, it is still too soon to think very cold temperatures and even snowfall are done for the season. The featured chart presents a period of record climatology for four inch depth soil temperatures from the ISU Soil Moisture station nearby Ames. The 2025 daily averages are plotted as well. The rate of warming of the soils is just getting started during March and the chart nicely shows how rapidly it happens during April with the average value increasing by about 15 degrees. The observed range of the data shows chilly soil temperatures are possible through at least the first couple of weeks of April with frozen temperatures possible during this period. It won't be long now!

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