Today | Weather | Thursday, July 16, 2026

Active Weather Warnings

Weather in Tempe, Arizona

07:05 PM

Now

93° F

Feels Like 93°

Precipitation 55 %

Wind 7 mph

UV Index (0 - 11+) 0

Humidity 44 %

Today

Day 100°

Night 81°

Precipitation 90 %

Wind 7 mph

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Tempe Weather Forecast Updated

17 minutes ago

Last updated on July 16, 2026 at 6:47 PM

Weather Forecast History

Last Year's Weather on This Day (July 16, 2025)

Day

97°

Night

77°

Wind

11 mph

UV Index

Precipitation

46 %

Air Quality in Tempe

NOW

31 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.16 µg/m³

PM₁₀ 11.14 µg/m³

O₃ 0.033 ppm

NO₂ 0.3 ppb

SO₂ 0 ppb

CO 0.09 ppm

NH₃ 0.59 µg/m³

NO 0.02 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 3.16 µg/m³

PM₁₀ – 11.14 µg/m³

O₃ – 65.33 µg/m³

NO₂ – 0.56 µg/m³

SO₂ – 0.08 µg/m³

CO – 99.33 µg/m³

NH₃ – 0.59 µg/m³

NO – 0.02 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Tempe

Severe Future Possible

Flood Watch

Flood Watch issued July 16 at 12:46PM MST until July 17 at 5:00AM MST by NWS Phoenix AZ

Jul 16, 3:00 PM → Jul 17, 6:00 AM

WHAT: Flooding caused by excessive rainfall continues to be
possible.

WHERE: South-central Arizona, including the following areas,
southern Gila County including the city of Globe, Maricopa County
including the Phoenix metropolitan area, and northern Pinal County.

WHEN: Through early Friday morning

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas. Low-water
crossings may be flooded.

ADDITIONAL DETAILS:
- Slow moving thunderstorms and those moving over the same areas
feeding off a high moisture environment may result in rainfall
rates in excess of 2-3"/hr.
- http://www.weather.gov/safety/flood

+ Read More

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Updated: Jul 16, 7:47 PM Source: NWS Alert

Air Quality Alert

Air Quality Alert issued July 15 at 10:07AM MST by NWS Phoenix AZ

Jul 15, 11:07 AM → Jul 16, 10:00 PM

AQAPSR

The Arizona Department of Environmental Quality (ADEQ) has issued an
Ozone High Pollution Advisory for the Phoenix Metro Area through
Thursday.

This means that forecast weather conditions combined with existing
ozone levels are expected to result in local maximum 8-hour ozone
concentrations that pose a health risk. Adverse health effects
increase as air quality deteriorates.

Ozone is an air contaminant which can cause breathing difficulties
for children, older adults, as well as persons with respiratory
problems. A decrease in physical activity is recommended.

You are urged to car pool, telecommute or use mass transit.
The use of gasoline-powered equipment should be reduced or done late
in the day.

For details on this High Pollution Advisory, visit the ADEQ internet
site at www.azdeq.gov/forecast/phoenix or call 602-771-2300.