Phoenix, AZ – Scorching desert heat returns Sunday as Phoenix braces for a blistering 109°F high — the hottest day in the extended forecast. Drivers along I-10 and outdoor workers should plan for early activity or stay indoors by mid-morning.
According to the National Weather Service in Phoenix, Sunday will be sunny with light southwest winds increasing to 10 mph by afternoon. Monday brings another 109°F peak, followed by slightly “cooler” highs of 108°F Tuesday and 105°F Wednesday as a pattern shift introduces isolated rain chances midweek.
Despite the gradual cooldown, overnight lows will remain in the mid-to-upper 80s — offering little overnight relief for the Valley. Heat-sensitive groups should avoid prolonged outdoor exposure, stay hydrated, and limit travel during peak hours.
By Wednesday night, a 20% chance of showers and thunderstorms appears, increasing to 30-40% by Thursday and Friday. While totals are uncertain, gusty winds, brief downpours, and lightning could impact evening commutes and outdoor plans.
Phoenix has not seen measurable rainfall this month, and the midweek monsoon activity may mark the first significant shift in July’s dry pattern. Localized cooling could bring slight temperature relief but also increase flash flood risk in low-lying areas.
Stay updated as NWS may issue heat advisories or thunderstorm warnings through Thursday. Daily highs will remain near or above 103°F through the end of the week.
