Itâs not often you can watch Wasatch Front thermometers flutter into the upper-90s â and call that a cooling trend. But highs on Thursday and Friday are just that, compared to the triple-digit temperatures ahead for northern Utah this weekend. The Salt Lake and Tooele valleys combined party cloudy skies, occasional thunderstorms and rain showers with daytime highs ranging in the mid- to upper-90s on Thursday and Friday.