Tucson 7‑Day Weather Forecast (July 2026)

Forecaster’s Quick Take

• Scattered clouds and humid – a hot, sticky start.
• Sunshine by late morning, then afternoon clouds and storms.
• Models show storms may arrive earlier than recent days, possibly during the evening commute.
• Afternoon highs around 101 °F (the detailed forecast lists 103 °F).
• Storms ease a bit over the weekend, but highs climb to near 105 °F by Saturday.
• Late‑day storms return Sunday‑Monday and continue into next week.

Detailed 7‑Day Forecast

Today (Wednesday)

• Day: Sunny → partly sunny. High 103 °F. Heat index up to 107 °F. Light/variable wind becoming NW 5‑10 mph, gusts to 20 mph.
• Night: 40 % chance showers/thunderstorms before 11 PM. Mostly cloudy. Low 78 °F. NW wind 5‑7 mph → calm.

Thursday

• Day: Mostly cloudy early, then clearing. High 104 °F. Heat index up to 108 °F. Calm → NW 5‑8 mph.
• Night: 20 % chance showers/thunderstorms before 11 PM. Partly cloudy. Low 80 °F. NW ~6 mph → calm.

Friday

• Day: 10 % chance showers/thunderstorms after 11 AM. Sunny, hot. High 106 °F. Calm → WNW 5‑7 mph.
• Night: 40 % chance showers/thunderstorms before 11 PM. Mostly cloudy. Low 80 °F.

Saturday

• Day: 10 % chance showers/thunderstorms after 11 AM. Sunny, hot. High 107 °F.
• Night: 30 % chance showers/thunderstorms before 11 PM. Partly cloudy. Low 79 °F.

Sunday

• Day: Mostly sunny, hot. High 105 °F.
• Night: 50 % chance showers/thunderstorms before 11 PM. Mostly cloudy. Low 77 °F.

Monday

• Day: 20 % chance showers/thunderstorms. Mostly sunny. High 102 °F.
• Night: 50 % chance showers/thunderstorms. Mostly cloudy. Low 76 °F.

Tuesday

• Day: 20 % chance showers/thunderstorms. Mostly sunny. High 100 °F.

Important Points

• Heat Index: “Feels like” temperatures are 4‑8 °F higher than actual highs (up to 108 °F). Drink water, stay cool.
• Storm Window: Most storms favor the evening (before 11 PM). Friday & Saturday have a small midday chance.
• Wind: Generally light (5‑10 mph from the northwest). Today may gust to 20 mph.
• Overnight Lows: Stay in the high 70s/low 80s °F – still warm.

Summary

Tucson faces a string of very hot days (100‑107 °F) with high humidity pushing the heat index above 105 °F. Afternoon/evening thunderstorms are likely each day, especially tonight, Friday night, Sunday night, and Monday night. Winds stay light. Protect yourself: hydrate, limit outdoor exertion during peak heat, and keep an eye on evening storm alerts.

FAQ

Q1: What is the heat index and why does it matter?
A: The heat index blends temperature and humidity to show how hot it feels on your body. A heat index of 108 °F means you feel like it’s 108 °F even if the thermometer reads 104 °F. High heat index raises the risk of heat‑related illness.

Q2: When are storms most likely?
A: The forecast shows the highest storm chances in the evening before 11 PM each night. Friday and Saturday have a slight chance of storms after 11 AM, but the main threat is late afternoon/evening.

Q3: How strong will the winds be?
A: Winds are light, around 5‑10 mph from the northwest. Today could see gusts up to 20 mph. No severe wind expected.

Q4: Will nights cool off enough to be comfortable?
A: Nighttime lows stay in the upper 70s to low 80s °F. It will still feel warm, so keep fans or air conditioning running if possible.

Q5: What should I do to stay safe in this heat?
A: Drink plenty of water, stay in shade or air‑conditioned spaces during the hottest hours (10 AM‑4 PM), wear loose, light‑colored clothing, and check on vulnerable neighbors or pets.