The Brief High temperatures in the Valley are expected to reach the low 80s this weekend as a strong high-pressure system brings clear skies and a warming trend across the western United States. Clear conditions will persist through Friday with a high of 77 degrees in Phoenix, while overnight lows in the high country are forecast to drop into the teens and 20s. The high country will see chillier overnight lows, some of which will fall into the teens and twenties. The high country will see a big warm-up as well, with highs climbing into the 50s and 60s. Scroll down this page for satellite and radar, day planner, records, current temperatures, 10-day forecast, forecast highs, and recent rainfall totals, plus live video feeds.