Rapid City Halloween Stays Dry, but Monday Brings 60 mph Winds
Residents can expect mild temperatures for trick-or-treating, followed by a disruptive low-pressure system that will bring heavy rain and strong gusts to the region.
By Ethan Cooper ·
October 31, 2026, arrives with unseasonably warm weather across the Rapid City area, offering a dry start to the holiday season. Cloudy skies will persist throughout the evening, keeping overnight lows at 48 degrees, which is noticeably higher than typical for this time of year. This mild pattern continues into the morning, setting the stage for a comfortable day before a sharp change in conditions arrives early next week.
The immediate forecast for Halloween evening remains favorable for outdoor activities. Highs across the KOTA Territory will reach the 60s under a blanket of clouds. Neither rain nor wind is expected to interfere with evening plans, providing a clear window for families to celebrate. The weather will hold steady through Sunday, with similar cloudy skies and temperatures remaining in the 60s.
Conditions will deteriorate rapidly late Sunday evening as widespread showers begin to develop. These initial rains serve as a precursor to a substantial low-pressure system moving in on Monday morning. This system is poised to turn Monday into a disruptive day, with temperatures dropping back into the 40s and 50s. Dreary rain is expected to fall continuously throughout the day, marking a sharp contrast to the previous days of warmth.
Wind poses the greatest threat during the Monday system. Forecasters are predicting daytime gusts exceeding 45 mph in Rapid City. As the sun sets, these winds will intensify, rising to speeds over 60 mph. This combination of high winds and persistent rain will create exceptionally wet and windy conditions for much of the region through the night.
By Tuesday, the winds will begin to subside, though gusts approaching 40 mph are still possible. Rain is expected to end by the morning, allowing sunshine to break through by Tuesday evening. The system will clear entirely by the second half of the week, restoring a stable pattern with highs in the 50s and lows in the 30s. Friday will close the week with partly to mostly sunny skies and temperatures in the low 50s.
