Pack or skip
Thermal underwear for Floral Park in September
Verdict
Skip it
Lows near 60°F — you'll overheat.
Why
Floral Park in September averages highs of 75°F, lows of 60°F, 7 rainy days.
That climate means thermal underwear isn't pulling its weight. Lows near 60°F — you'll overheat.