A period of mostly dry and sunny weather across Utah is expected to transition into unsettled conditions by the weekend, with rain and thunderstorms likely for much of the state. Forecast models indicate an increased risk of flash flooding in some areas as storm systems move through the region.
Sunny Conditions Across the State
The current weather pattern across much of Utah remains predominantly sunny or partly cloudy on Tuesday, October 27, 2026. In Saint George, temperatures are expected to reach a high near 73 degrees F under sunny skies, while Salt Lake City International Airport expects a high of 63 degrees F with sunny conditions. In the high elevations near Trial Lake, temperatures remain much cooler with a high of 34 degrees F.
Mid-Week Cooling and Light Precipitation
The National Weather Service Salt Lake City reports that a couple of weak systems brushing northern Utah through mid-week will keep temperatures seasonably cool. These systems are expected to bring showers across the north tonight and again Tuesday night. A cold front is currently marching through northern Utah, associated with a shortwave trough grazing the area. This front is not expected to push much farther south than the central Wasatch Front before weakening later tonight. Precipitation from this system is expected to be short-lived, tapering off for the most part shortly after midnight, with light amounts of precipitation and a few tenths of an inch at best of snow in the higher elevations of northern Utah.
Weekend Storms and Flood Risk
Looking toward the weekend, two storm systems are forecasted to bring wetter weather back to the region from Friday into the weekend. The National Weather Service warns that widespread precipitation during this period could result in an increased risk for flash flooding. Specifically, by Sunday, a southern stream trough associated with more abundant moisture will phase with a low, bringing more significant precipitation to the desert southwest. While widespread precipitation is expected on Sunday, there remains uncertainty regarding the exact amounts. Latest model runs suggest precipitation amounts could range from 0.4 to 1.8 inches in the southwestern valleys and 0.55 to 2.2 inches in the southern mountains.
Transition to Friday Showers
The forecast for Friday, October 30, 2026, indicates a transition toward unsettled weather. In Saint George, there is a 40 percent chance of showers and thunderstorms, with rain becoming likely after midnight. In Salt Lake City, there is a 40 percent chance of rain, mainly after noon. In the Utah Valley, including Lehi and Provo, there is a 70 percent chance of rain showers on Friday night, with rain likely after midnight. In the southern area near Zion Canyon, showers are likely with a 60 percent chance of precipitation on Friday.
Halloween Weekend Forecast
Saturday, October 31, 2026, is expected to bring continued unsettled weather. In Saint George, there is a chance of showers and thunderstorms in the afternoon, with rain likely on Saturday night. In Salt Lake City, showers are likely with a 70 percent chance of precipitation, and rain showers are likely in the evening. In Utah Valley, the chance of showers is 70 percent on Saturday and 80 percent on Saturday night. In the high mountains near Trial Lake, snow showers are expected with a high of 31 degrees F.
Significant Sunday Precipitation
Sunday, November 1, 2026, will see significant precipitation across much of the state. In Saint George, rain and possibly a thunderstorm are expected with a high near 62 degrees F. In Salt Lake City, rain and possibly a thunderstorm are forecasted with a high of 52 degrees F. In the southern mountains, accumulating mountain snow is likely, with amounts potentially reaching 3 to 6 inches in the upper Cottonwoods, high Uintas, and near Brian Head. In the Utah Valley, rain showers are expected with a 90 percent chance of precipitation, and in the southern region near Zion, rain and possible thunderstorms are expected with a high of 48 degrees F.
Return to Drier Conditions
As the storm system moves out, a cool but drier continental airmass is expected to arrive by the early part of next week. By Monday, November 2, 2026, most areas will see mostly sunny or partly sunny conditions. In Saint George, the high will be near 62 degrees F, while Salt Lake City anticipates a high of 51 degrees F. In the higher elevations near Trial Lake, a chance of snow remains possible with a high of 24 degrees F.
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