The featured chart presents the frequency of daily high and low temperature combinations for Ames. The largest frequency to have a high of 84 to 86 and a low of 60 to 62, which is roughly the climatology for much of the summer season. The chart shows an interesting artifact around the freezing mark with higher frequencies showing up just below freezing for the daily low temperature. It is relatively more common to have a low temperature just below freezing than to have one just above. The reason being during the cold season with snow on the ground and/or cold soils, the temperature will often drop to below freezing after a daytime temperature above freezing. Restating, it is difficult for the air to maintain a warm temperature at night when the soil and/or snow are at sub-freezing temperatures.

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Tags:   high   low