 We'll also see temperatures decrease when chances for showers increase. We're looking at temperatures about 5 to 10 degrees above normal, but as that moisture starts to come back up and the temperatures go down, we'll be about where we should be for this time of year. Humphreys says heavier showers are expected to hit starting Friday. Initially start out just kind of along the rim and then the White Mountains, and then as we get later in the week, we'll start to see chances increase over much of northern Arizona. It is warm.