TUCSON, Ariz. – Triple-digit heat will grip southern Arizona through midweek, with Tucson residents facing 102°F temperatures on Tuesday, September 9. The extreme heat poses risks for drivers on I-10, construction crews, and outdoor workers urged to stay hydrated and limit midday exposure.
According to the National Weather Service in Tucson, Tuesday will bring sunshine and highs near 102°F, with calm winds shifting southwest in the afternoon. Heat lingers through Wednesday before a slight thunderstorm chance returns Thursday afternoon into the evening. Showers may develop along the I-10 corridor, raising concerns for slippery roads and reduced visibility during peak travel hours.
Tucson neighborhoods, including South Tucson and the foothills, can expect daily highs above 100°F through Thursday, with cooler overnight lows near 75°F. Heat index values will stay elevated, making it essential to check on elderly neighbors and keep pets indoors. Cooling centers remain open across Pima County.
By Thursday night, monsoon moisture could trigger scattered storms, though chances remain low at 10 percent. Any storm activity could bring sudden downpours, gusty winds, and lightning. Drivers are urged to avoid flooded washes and allow extra travel time.
The weekend offers modest relief, with Friday dipping just below 100°F. Saturday and Sunday will remain sunny, with highs in the upper 90s, signaling a gradual shift toward fall conditions.
Residents should prepare for one more stretch of dangerous heat and stay alert to changing conditions later in the week. Additional advisories are possible as thunderstorm chances develop Thursday into Thursday night.
Five-Day Forecast for Tucson, Arizona:
- Tuesday: Sunny, high near 102°F, low around 77°F.
- Wednesday: Sunny, high near 102°F, low around 75°F.
- Thursday: 10% chance of thunderstorms after 11 a.m., high near 100°F, low near 73°F.
- Friday: Sunny, high near 98°F, low near 71°F.
- Saturday: Sunny, high near 98°F, low near 71°F.
