The Tallahassee Regional Airport, on the city's southwest side, has a minimum temperature that is colder than minima of neighboring towns and other parts of Tallahassee when clear and calm conditions prevail over the area. The anomaly is described in detail with a series of comparison studies using daily minimum temperature data from nearby locations. This cold anomaly is statistically significant and is most common during the cold season. Its cause appears to be anomalous radiational cooling resulting from enhanced exposure of the ground to open sky, and local cooling rates are probably intensified by sandy soil conditions. Cold-air drainage does not appear to be an important factor.

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*Current affiliation: National Weather Service Forecast Office, New Braunfels, Texas.