There’s really no need for a big thermometer on a hiking trail—especially in Arizona. Hikers know what the weather is like, obviously: it’s hot as blazes! And if you’re not already well-equipped with a hat, sunscreen, and plenty of water, a few degrees aren’t going to make a difference.
The last few days the temperature has hit 90 degrees and stayed there. When I took my hike today, starting at about 1 p.m., it was 90 out, and there was no one—literally, not a single soul—on the trails. When I looped back around 3 p.m. it was still 90 out, and I saw two intrepid hikers as I neared the trail head. Those were the only people I saw on some very cool trails.
People around here call it a dry heat, because there is no humidity. Unlike the Midwest, where 90 degrees would mean you’re dissolved in sweat, 90 is much more tolerable here— but it’s still hot. If you don’t have a good hat and water, you’re begging for a case of sunstroke and cramps.