New Castle Weather Forecast
- 67
- 83
Rain Showers
- 59
- 83
Rain Showers Likely
- 54
- 71
Rain Showers Likely
- 55
- 69
Slight Chance Thunderstorms
- 54
- 69
Mostly Cloudy
- 54
- 70
Mostly Cloudy
Today 19 Sep Henry
Partly cloudy with scattered Showers with a slight chance of Thunderstorms through early Afternoon, then numerous Showers with a chance of Thunderstorms late in the afternoon. More humid with Highs in the lower 80s. South Winds 5 to 10 Mph. Chance of rain 70 percent.
Tonight 19 Sep Henry
Partly cloudy. Scattered Showers with isolated Thunderstorms through the late Overnight, then a chance of Showers and Thunderstorms toward daybreak. Lows in the upper 60s. South Winds around 5 Mph. Chance of rain 50 percent.
New Castle Temperature Statistics
September Temperature
Anderson Municipal Airport (17.4 miles)
Lowest 14 September, 2026
52.7 °FAverage September
73.4 °FHighest 3 September, 2026
95 °F
Climate (2021–2026)
Anderson Municipal Airport (17.4 miles)
Average Low 2021–2026
44.1 °FAverage 2021–2026
51.6 °FAverage High 2021–2026
62.3 °F