Average Low. Ellwood City, PA Monthly Weather | AccuWeather October 2023 Daily S M T W T F S 1 69° 51° 2 70° 49° 3 75° 51° 4 69° 49° 5 73° 52° 6 73° 51° 7 74° 52° 8 73° 51° 9 74° 53° 10 71°. Weather.com brings you the most accurate monthly weather forecast for Ellwood City, PA, United States with average/record and high/low temperatures, precipitation and more.