Weather
Arizona Weather Alert: Tucson Rain Risk Rises Oct 30-31
Tucson, AZ – Sunshine and temperatures approaching 90 degrees will dominate much of the coming week before a notable weather change brings showers, possible thunderstorms and cooler conditions to the
By Evan Cross · 2026-10-25T10:43:35.305Z
Tucson, AZ – Sunshine and temperatures approaching 90 degrees will dominate much of the coming week before a notable weather change brings showers, possible thunderstorms and cooler conditions to the Tucson area Friday, Oct. 30. Rain chances climb to 70% during the day and remain elevated Friday night, potentially affecting travel and preparations for Halloween weekend. The shift follows several afternoons in the upper 80s, making Friday's expected drop to around 80 degrees one of the more noticeable changes in the local forecast.
According to the National Weather Service in Tucson, showers are likely Friday, with thunderstorms also possible as temperatures reach a high near 80 degrees. The probability of precipitation stands at 70%, followed by a 60% chance Friday night as mostly cloudy skies continue and temperatures fall to approximately 61 degrees. While the forecast supports a meaningful increase in rain chances, specific rainfall totals and the precise timing of thunderstorms have not been established.
Friday Storm Chances Interrupt a Warm, Dry Week The approaching weather change follows several days of consistently warm afternoons across Tucson and surrounding portions of Pima County. Temperatures are expected to reach 85 degrees Monday before climbing to 87 degrees Tuesday, Wednesday and Thursday. Sunshine or mostly sunny skies will prevail through much of that period, creating favorable conditions for outdoor activities before clouds and precipitation become more prominent.
Friday's anticipated high of 80 degrees represents a seven degree decline from the preceding afternoons. Although temperatures will remain relatively warm for late October, the combination of increased cloud cover and possible rainfall could make conditions feel considerably different. The forecast does not currently identify a severe thunderstorm threat specifically for Tucson, and no damaging wind or hail projections were included in the supplied local outlook.
Rain Could Affect Travel and Halloween Preparations The timing of Friday's precipitation could become particularly important for motorists traveling Interstate 10, Interstate 19 and major Tucson area roadways. Showers may produce wet pavement, while heavier thunderstorms could temporarily reduce visibility. Drivers should monitor updated weather information before longer trips, especially if precipitation becomes concentrated during busier afternoon or evening travel periods.
Halloween celebrations Saturday, Oct. 31, could also encounter unsettled conditions. The National Weather Service projects a 40% chance of showers and thunderstorms Saturday, with mostly cloudy skies and a high near 75 degrees. That would place afternoon temperatures approximately 12 degrees below the 87 degree highs expected earlier in the week, although the decline would occur over several days rather than within a few hours.
The broader Southwest is also experiencing an active weather pattern earlier in the week. NOAA's Weather Prediction Center identifies a Slight Risk of excessive rainfall across portions of the central and southern Rockies and High Plains Sunday. However, that regional risk does not automatically extend to Tucson, where the supplied forecast indicates dry conditions through Thursday.
What Happens After the Weather Shift? For Tucson residents planning outdoor events, the most important forecast period begins Friday and extends into Saturday. Rain probabilities of 70%, 60% and 40% across successive forecast periods suggest precipitation remains possible into Halloween, although those percentages do not indicate how long rain will last or how much will fall.
The National Weather Service may refine thunderstorm timing and rainfall expectations as the week progresses. Residents organizing outdoor celebrations should consider flexible arrangements while continuing to monitor updated local forecasts.
Will the possibility of Friday thunderstorms and cooler Halloween temperatures change your weekend plans?
Five Day Weather Outlook Sunday 10/25: Sunny skies dominate Tucson, with afternoon temperatures reaching approximately 80 degrees and northwest winds around 5 to 7 mph; Sunday night remains mostly clear, with temperatures dropping to around 56 degrees.
Monday 10/26: Sunshine continues as temperatures climb to approximately 85 degrees, with light northwest winds developing during the afternoon; clear skies are expected Monday night, with a low near 58 degrees.
Tuesday 10/27: Sunny and warmer conditions bring afternoon temperatures near 87 degrees, maintaining the dry weather pattern across the Tucson area; Tuesday night remains mostly clear, with temperatures falling to approximately 61 degrees.
Wednesday 10/28: Mostly sunny skies prevail, with another warm afternoon reaching approximately 87 degrees; Wednesday night becomes partly cloudy, with temperatures dropping to around 63 degrees and no precipitation indicated in the supplied forecast.
Thursday 10/29: Partly sunny skies accompany another high near 87 degrees before clouds increase Thursday night, when temperatures fall to around 64 degrees and the chance of showers reaches 30%.
Extended Weather Outlook Friday, Oct. 30: Showers are likely, with thunderstorms possible and a 70% precipitation chance. Mostly cloudy skies accompany a high near 80 degrees. Friday night brings a 60% chance of showers and possible thunderstorms, with a low near 61 degrees.
Saturday, Oct. 31 — Halloween: Mostly cloudy conditions continue, with a 40% chance of showers and thunderstorms and an afternoon high near 75 degrees. The supplied forecast does not provide a Saturday night temperature or precipitation probability.