Tucson, AZ – 7‑Day Weather Forecast (Simple Guide)

What’s Happening Right Now?

• Scattered clouds and humid air this morning.
• Sunshine should break through by late morning.
• Afternoon clouds will bring another round of storms.
• Computer models show the storms may arrive earlier than recent days – possibly during the evening commute.
• Afternoon high around 101 °F (the detailed forecast below says 103 °F).

Day‑by‑Day Forecast

All temperatures are in Fahrenheit. “Heat index” tells you how hot it feels when humidity is added. “Chance of showers/thunderstorms” is the probability you’ll see rain or lightning.

Today (Wednesday)

• High: 103 °F
• Heat index: up to 107 °F
• Sky: Sunny → partly sunny in the afternoon
• Wind: Light/variable → northwest 5‑10 mph (gusts up to 20 mph)

Tonight

• Low: 78 °F
• Chance of storms: 40 % (mainly before 11 PM)
• Sky: Mostly cloudy
• Wind: Northwest 5‑7 mph, becoming calm later

Thursday

• High: 104 °F
• Heat index: up to 108 °F
• Sky: Mostly cloudy early → gradual clearing
• Wind: Calm → northwest 5‑8 mph

Thursday Night

• Low: 80 °F
• Chance of storms: 20 % (before 11 PM)
• Sky: Partly cloudy
• Wind: Northwest ~6 mph, becoming calm

Friday

• High: 106 °F
• Chance of storms: 10 % (after 11 AM)
• Sky: Sunny & hot
• Wind: Calm → west‑northwest 5‑7 mph

Friday Night

• Low: 80 °F
• Chance of storms: 40 % (before 11 PM)
• Sky: Mostly cloudy

Saturday

• High: 107 °F
• Chance of storms: 10 % (after 11 AM)
• Sky: Sunny & hot

Saturday Night

• Low: 79 °F
• Chance of storms: 30 % (before 11 PM)
• Sky: Partly cloudy

Sunday

• High: 105 °F
• Sky: Mostly sunny & hot

Sunday Night

• Low: 77 °F
• Chance of storms: 50 % (before 11 PM)
• Sky: Mostly cloudy

Monday

• High: 102 °F
• Chance of storms: 20 %
• Sky: Mostly sunny

Monday Night

• Low: 76 °F
• Chance of storms: 50 %
• Sky: Mostly cloudy

Tuesday

• High: 100 °F
• Chance of storms: 20 %
• Sky: Mostly sunny

Key Things to Remember

Important:

• Heat index may reach 108 °F on Thursday – that’s very hot for the body.
• Storms are most likely late afternoon/evening (especially tonight, Friday night, Sunday night, Monday night).
• Wind gusts up to 20 mph this morning could make driving a bit trickier.
• Stay hydrated, limit outdoor exertion during peak heat, and keep an eye on radar if you’re on the road during storm windows.

How to Use This Forecast (Simple Steps)

1. Check the high/low for the day you care about.
2. Look at the “Chance of storms” – if it’s 30 % or higher, plan for possible rain or lightning.
3. Note the heat index – when it’s above 100 °F, drink water often and take breaks in shade/AC.
4. Watch the wind – gusts >15 mph can affect high‑profile vehicles.
5. Adjust plans – if a storm is likely during your commute, leave a few minutes early or have a backup route.

Quick Summary

• Hot & humid all week, with highs 100‑107 °F.
• Heat index peaks at 108 °F (Thursday).
• Storms mainly late afternoon/evening, chances ranging from 10 % to 50 %.
• Winds generally light, but gusts up to 20 mph this morning.
• Stay cool, stay dry, and stay informed!

Frequently Asked Questions (FAQ)

Q1: What is “heat index” and why does it matter?
A: Heat index combines temperature and humidity to show how hot it feels to your body. A higher heat index means you can overheat faster, so drink water and avoid heavy activity.

Q2: When are thunderstorms most likely this week?
A: The highest chances are tonight (40 %), Friday night (40 %), Sunday night (50 %), and Monday night (50 %) – all mainly before 11 PM.

Q3: Should I change my commute because of the storms?
A: If you travel during the late‑afternoon/evening window (especially tonight and Friday), give yourself extra time and check a live radar app before you leave.

Q4: Will it cool down at all this week?
A: Not really – lows stay in the high 70s to low 80s, and highs stay above 100 °F through Tuesday.

Q5: How reliable is this 7‑day forecast?
A: The first 2‑3 days are usually very accurate. Beyond that, details (exact storm timing, exact high) can shift, but the overall pattern (hot, humid, evening storms) is fairly confident.