| NWS Forecast for: Newcastle WY Issued by: National Weather Service Rapid City, SD Last Update: 3:51 pm MST Nov 12, 2025 | |
| Tonight: Mostly cloudy, with a low around 38. Light east wind. Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 64. Light and variable wind. Thursday Night: Mostly clear, with a low around 41. Southeast wind 3 to 5 mph. Friday: Mostly sunny, with a high near 68. South wind 5 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph. Friday Night: Partly cloudy, with a low around 38. West wind around 10 mph becoming north after midnight. Winds could gust as high as 20 mph. Saturday: Sunny, with a high near 55. Northwest wind 7 to 9 mph, with gusts as high as 17 mph. Saturday Night: Mostly clear, with a low around 34. Northeast wind around 5 mph becoming light and variable in the evening. Sunday: Mostly sunny, with a high near 55. Southeast wind 3 to 8 mph. Winds could gust as high as 15 mph. Sunday Night: A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 37. Monday: A chance of rain. Mostly cloudy, with a high near 45. Monday Night: A chance of rain. Mostly cloudy, with a low around 29. Tuesday: A slight chance of rain and snow. Mostly cloudy, with a high near 42. Tuesday Night: A chance of rain and snow. Mostly cloudy, with a low around 26. Wednesday: A slight chance of snow. Partly sunny, with a high near 41. | |
| Newcastle WY 43.86°N 104.21°W (Elev. 4380 ft) | |
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