TUCSON, Ariz. – Dangerous summer heat returns to southern Arizona Saturday, July 12, as triple-digit temperatures threaten residents and travelers across Tucson and Pima County. Outdoor plans along I-10 or I-19 could be interrupted by fast-moving storms after 5 p.m., putting extra pressure on those spending time outside.
According to the National Weather Service in Tucson, the area will bake under a high near 105°F Saturday, with a 30% chance of afternoon thunderstorms developing mainly after 5 p.m. Gusty winds may reach up to 22 mph, making outdoor activities risky, especially for those working or driving along major corridors. Take steps now: limit time in direct sun, hydrate frequently, and monitor sky conditions if you plan to be out late.
Daytime Saturday will be mostly sunny and oppressively hot. Storms could bring localized downpours, lightning, and brief gusty winds, especially west of I-10. Sunday looks similar, with 106°F heat and another chance of storms after 5 p.m. Monday and Tuesday both bring storm chances near 30–40% after 11 a.m., keeping the risk of flash flooding in play through the start of the week.
Five-Day Tucson, AZ Forecast (Sat, July 12 – Tue, July 16):
- Saturday: Hot, high 105°F. 30% chance of storms after 5 p.m.
- Sunday: High 106°F, storms possible after 5 p.m.
- Monday: High 105°F, 30% chance of storms after 11 a.m.
- Tuesday: High 103°F, 40% chance of storms after 11 a.m.
- Wednesday: Showers and storms likely, high 101°F.
