A cold front, cutting through western New York State this evening, will be positioned across the Hudson Valley around midnight and into the greater Springfield area by dawn Sunday. Numerous showers develop ahead of the front through the overnight, with a chance of a thunderstorm. Some of the showers could bring locally heavy downpours to a few areas. Patchy fog redevelops. Temperatures stay mild as lows only fall to the low 60s and it will feel a bit muggy as well. Southerly winds 5 to 15 mph overnight.
As the front moves eastward on Sunday any morning showers will come to an end with skies becoming partly to mostly sunny for the afternoon. It will be cooler as temperatures top out in the upper 60s to 70 degrees. Winds turn to the northwest at 10 to18 mph. Sunday will also mark the beginning of Autumn as the autumnal equinox takes place at 4:44 p.m.
Skies clear out Sunday night and another very cool and refreshing air mass follows the frontal passage. Temperatures tumble into the upper 30s and low 40s. Winds diminish from the northwest at less than 10 mph.
Next week will be very similar to this past week. High pressure expands eastward and becomes the dominating feature for a good portion of the week. Dry conditions through the week, much cooler to begin, then a moderating trend later in the week.
Monday, sunny, much cooler and fall like for the first full day of Autumn. Highs only reaching into the low 60s. Clear and chilly overnight. Lows in the mid 30s to 40 degrees.
Tuesday and Wednesday: Fair skies with sunny days and mostly clear nights. Highs mid 60s to 70 degrees. Lows in the upper 30s to low 40s.