Greater Tucson/ Weather & Environment

Tucson Sun Gives Way to Desert Thunder as Stormy Week Rolls In

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Published on October 18, 2026
Tucson Sun Gives Way to Desert Thunder as Stormy Week Rolls InSource: Google Street View

Tucson’s clear start to Sunday, October 18, comes with a mild mid-60s reading near Tucson International Airport, but the calm is on a timer. A slight chance of showers and thunderstorms is in the forecast Sunday, with the high reaching about 83 degrees.

Sunday’s Storm Chance Stays Spotty

According to the National Weather Service in Tucson, Sunday has a 20% to 40% chance of showers. East-southeast surface winds are forecast at 5 to 15 knots. Tonight will be partly cloudy, with a low near 62 and a small chance of showers or thunderstorms before 5 a.m. Monday.

Monday Brings The Better Bet For Thunder

Monday, October 19, looks more unsettled, with a slight chance of morning showers followed by a 40% chance of showers and thunderstorms between 11 a.m. and 5 p.m. Mostly sunny skies are still expected for much of the day.

The latest forecast is a calmer turn from the wind-advisory setup covered in Saturday’s Hoodline report. No watches or warnings are listed in the current forecast, making this a spotty shower-and-storm pattern rather than a broad washout.

Warm Midweek, Then A Cooler Turn

Tuesday, October 20, and Wednesday, October 21, should bring near-normal temperatures, with precipitation chances continuing each day.

Thursday, October 22, brings another chance of precipitation. The pattern turns sunny and cooler Friday, October 23, with a high near 74.