This is an archived article that was published on sltrib.com in 2014, and information in the article may be outdated. It is provided only for personal research purposes and may not be reprinted.

It will be a John Muir kind of weekend for Utah, one to climb mountain trails and allow "Nature's peace [to] flow into you as sunshine flows into trees . . . while cares will drop off like autumn leaves."

The Scottish-American conservationist and Sierra Club founder would relish the Wasatch Front's clear, sunny Saturday and Sunday, and the promise of daytime highs in the mid- to upper-60s. And perhaps on this weekend's chilly nights in the 40s, he would sit by the campfire, writing letters home sharing his near-religious ecstasy for nature's divinity.

In southern Utah, Muir could shed his coat and collar, roll up his shirtsleeves and don a broad-brimmed straw hat to bask in warm days of cloudless skies with temperatures in the 80s. A single blanket may suffice at night, with low temperatures in the upper-50s.

The Utah Division of Air Quality is playing its part on the forecast for an idyllic autumn weekend, too, rating the entire state at "green," or healthy breathing conditions through Sunday.

The Intermountain Allergy & Asthma website listed only sagebrush and mold as "moderate" on its pollen index as of Thursday, with other allergens at levels too low to record.

To find more detailed forecast information, visit the Tribune's weather page at sltrib.com/weather.

Twitter: @remims