| NWS Forecast for: Newcastle Issued by: National Weather Service Rapid City, SD Last Update: 1244 AM MDT Wed Apr 29 2026 |  |
| Overnight: Partly cloudy. Lows in the mid 20s. North winds around 5 mph. Wednesday: Partly cloudy. Isolated rain showers and thunderstorms in the afternoon. Highs in the mid 50s. Northwest winds 5 to 10 mph, increasing to 10 to 20 mph in the afternoon. Chance of rain 20 percent. Wednesday Night: Partly cloudy in the evening, then clearing. Lows in the upper 20s. North winds 10 to 15 mph. Gusts up to 25 mph in the evening. Thursday: Mostly sunny. Highs in the mid 50s. Northwest winds 10 to 15 mph with gusts up to 25 mph. Thursday Night: Clear. Lows in the mid 20s. Northeast winds 5 to 10 mph. Gusts up to 20 mph in the evening. Friday: Sunny. Highs in the lower 60s. Friday Night: Clear. Lows around 30. Saturday: Mostly sunny. Highs in the lower 70s. Saturday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. Sunday: Partly cloudy. A slight chance of rain showers in the morning, then a chance of rain showers in the afternoon. Highs in the upper 60s. Chance of rain 40 percent. Sunday Night: Partly cloudy. Lows in the upper 30s. Monday: Partly cloudy in the morning, then clearing. Highs around 70. Monday Night: Partly cloudy in the evening, then clearing. Lows around 40. Tuesday: Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 20 percent. | |
| Zone Forecast: Newcastle | |
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