According to the Köppen climate classification system, Feasterville has a Hot-summer Humid continental climate (Dfa). Dfa climates are characterized by at least one month having an average mean temperature ≤ , at least four months with an average mean temperature ≥ , at least one month with an average mean temperature ≥  and no significant precipitation difference between seasons. Although most summer days are slightly humid in Feasterville, episodes of heat and high humidity can occur with heat index values > .
Feasterville's climate, according to the Köppen system, falls under the Dfa category, signifying hot summers with high humidity and occasional heat waves.