The sky over southern Arizona will be mostly sunny today as temperatures trend upward into what forecasters are calling a notably hot stretch. Meteorologist April Madison reports that moisture will slowly seep into the region from the east, but for now the dominant theme remains heat and sunshine. Residents can expect typical daytime warmth compounded by increasing humidity later in the week as the atmosphere responds to the incoming moisture.
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Moisture drifting in from the east will bring at least a slight chance for isolated showers or thunderstorms to parts of eastern Pima County this afternoon and evening. Those isolated storm chances are expected to be limited for the immediate Tucson area, with the better likelihood for measurable storms remaining to the east. Forecasters emphasize that while isolated, these showers and storms could develop where the extra moisture and daytime heating come together.
Meteorologist highlights scattered showers and storms over southeastern Arizona on the clouds and precipitation outlook, illustrating the forecasted increase in moisture this week.
As the week progresses, forecasters expect that the area of increased moisture will expand westward. That progression will bring broader storm chances into more of the region later in the week as southerly and easterly moisture feeds into the state. April Madison notes the pattern will shift from isolated, eastern-area activity to a wider area of storm potential as the atmosphere becomes more humid from both southern and eastern moisture sources.
Heat will be a major concern through the middle of the week. An Excessive Heat Warning has been issued and will be in effect from 10 a.m. to 8 p.m. on both Tuesday and Wednesday. Forecast graphics show widespread triple-digit heat across Tucson and nearby valleys during those warning periods, underscoring the elevated heat risk expected on those days. Officials and forecasters have highlighted the warning window as the time when conditions will be most extreme.
Forecast high-temperature map showing widespread triple-digit heat across Tucson and nearby valleys, supporting the extreme heat warnings in effect Tuesday and Wednesday.
Forecast guidance indicates high temperatures will run above seasonal norms as this pattern unfolds. Current projections have daytime highs ranging roughly three to eight degrees above normal through Thursday, with the peak heat arriving during the Excessive Heat Warning periods. That degree of departure from the climatological average contributes to the issuance of the heat warning and will be an important factor for anyone planning outdoor activity during the day.
Local weather resources remain available for residents tracking conditions. Hourly forecasts, a seven-day outlook, live radar and active weather alerts can provide up-to-the-minute detail on temperatures, storm chances and any changes to watches or warnings. Additional regional graphics and data — including current temperatures, today's highs and lows, dew point maps, and precipitation summaries for Tucson and the broader state — are also available for those who want a deeper look at how the heat and moisture trends are evolving. Local segments, such as the Cochise County Monday Weather update, are part of the coverage offering a closer look at conditions in specific parts of the region.
Meteorologist April Madison is the on-air forecaster providing the forecast narrative and timing for the incoming moisture and the periods of elevated heat. She reiterates that while today will be mostly sunny and hot, the week’s progression will bring an increase in moisture from the south and east that raises the likelihood of storms first in eastern areas and then gradually farther west. Residents are urged to stay aware of both heat advisories and any localized storm impacts as the situation develops.
The National Weather Service in Tucson upgraded its Extreme Heat Watch to a Warning for Tuesday, July 7 from 10 a.m. through Wednesday, July 8 at 8 p.m., with highs up to 111°F and major heat risk across lower desert areas. @NWSTucson urged precautions as moisture increases storm potential later in the week.
The National Weather Service's latest area forecast discussion now projects afternoon highs across the lower deserts in the 111–116°F range, with guidance showing Tuesday, July 7, 2026, around 110–114°F and Wednesday, July 8, 2026, potentially peaking 112–116°F.
Forecast guidance keeps precipitation chances quite low for the lower deserts during the peak-heat period — only low-end probabilities of precipitation (roughly 10–15%) are expected, primarily over higher terrain east of Globe, with little chance of measurable storms in the Tucson metro through Thursday.
The regional forecast discussion also calls attention to escalating fire-weather concerns later this week, noting Red Flag Warning conditions and wind advisories are expected for parts of eastern Arizona with gusts in the 25–40 mph range that could support rapid fire spread.
Local heat-relief resources are in place: Tucson-area cooling centers typically operate daily from noon–4 p.m. through August 31, 2026, and residents can call 2-1-1 for locations, hours, or help arranging transportation to a cooling site.