A mild March has been plugging along with a well-above-normal average temperature and five days of 70 degrees or higher, but a rude interlude is forecast.
A pattern flip is expected to draw cold air from the arctic on Sunday and Monday, moderating but lingering through Wednesday. After that a warmup is likely on the last day of March with seasonable conditions to follow, according to AccuWeather.
A forecast high in the mid-30s on Monday with mostly sunny conditions will pose a danger to the date record of 35 for coldest high temperature for March 28 from 1937 and 1996.
The lows Monday through Wednesday mornings are forecast to be in the low- to mid-20s and would not challenge the date records. Those are 18, 17 and 12 degrees, respectively. The years are 2014, 1923 and 1923, respectively.
That 45.9 degrees would be not quite high enough to get onto the list of 10 warmest Marches in the 124-year Berks database, should the month end at that.
The chilly interlude will certainly knock this month out of contention. This month has set three date records for warmth, two highs and a low.
March weather has shown wide temperature variations in recent years, with 2010, 2012 and 2016 on the 10 warmest list and 2014 and 2015 on the 10 coldest list.
Normal is currently the average of the years 1991 to 2020, which is the second-warmest 30-year block on record in Berks. Only 1931 to 1960 is warmer.
The definition of normal is set by the weather service.
Source: Berkshire mont
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