Tucson starts Thursday, October 29, with scattered to broken cirrus and temperatures around 59 degrees, but afternoon heat will climb to 87 before a much wetter, cooler pattern takes over Friday through Monday. The city's quiet late-October stretch is about to trade sandals for rain gear, at least temporarily.
One More Warm, Mostly Dry Day
Thursday will be partly sunny, with light, terrain-driven surface winds under 12 knots. Thursday night will have a low near 63, with a 10% chance of rain.
Storms Arrive Friday
The National Weather Service Tucson office expects showers and thunderstorms to become more likely Friday after a slight morning chance. The high should reach about 80 degrees, with a 60% chance of precipitation.
Some storms could produce brief heavy rain, damaging wind gusts and hail. Storms are expected to move fairly quickly, but repeated rounds could still create rapid runoff and localized flash flooding, particularly in areas that see several downpours.
Halloween Weekend Looks Damp
Saturday offers a relative break during the day, with partly sunny skies and a high near 79. A 40% rain chance is forecast Saturday, rising to 70% Saturday night, so outdoor Halloween plans may need a backup option after dark.
Sunday is the wettest day in the forecast, with a 90% chance of rain and thunderstorms, a high near 73 and a low around 57. Showers are likely before 11 a.m., followed by additional showers and thunderstorms through the afternoon and evening.
The broader southeast Arizona forecast calls for roughly half an inch to an inch of rain in valley areas and 1 to 2 inches in the mountains, though totals can shift as individual storm tracks develop. Roads near washes, dips and low-water crossings could see quickly changing conditions during heavier rainfall.
Cooler, Drier Weather Returns Monday
Monday starts with a 30% chance of morning showers before skies turn mostly sunny, with a high near 72. Tuesday and Wednesday look sunny, with highs near 74 and 77.
No watches, warnings or advisories are posted for the Tucson area Thursday morning. Even so, drivers should never cross a flooded roadway, and hikers, cyclists and anyone spending time near normally dry washes should check conditions before heading out this weekend.
