It happens most every early April. The grass starts to green up, we just some rains to mellow out the frozen ground, the lengthening days and increasing sunshine energy makes us believe that perhaps the freezing temperatures are behind us and we are free to start planting things. While the near term forecast looks great for warm temperatures, climatology tells us that we have plenty of days yet to go before the possibility of a freeze becomes very small. The featured chart presents the percentage of years that had at least a given threshold temperature on or after the date shown. These values are presented for four different thresholds. For the first day of April, almost 90% of years experienced a sub 29F temperature after this date for that year. One has to wait about two weeks before that threshold reaches 50% frequency.

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Tags:   freeze