Arizona Weather Forecast Map – Thursday will be a warm day in the Valley as an Excessive Heat Warning is still in effect. The high in Phoenix on Sept. 5 will be about 113ยฐF. . An Excessive Heat Warning will be in effect on Wednesday across Arizona as above-normal temperatures are expected for many parts of the state. .
Arizona Weather Forecast Map NWR Arizona Coverage: An Excessive Heat Warning will be in effect from Wednesday through Friday night. Temperatures in the Valley are expected to reach about 114ยฐF on Thursday. . A sunny and warm Labor Day in the Valley with a high near 107ยฐF. PHOENIX – It will be a warm Labor Day in the Valley, with dry conditions expected on Sept. 2. The high in Phoenix on Monday will be .