Today | Weather | Friday, September 18, 2026
Active Weather Warnings

Weather in Memphis, Tennessee

09:00 PM
Now
Cloudy Night
86° F
Feels Like 86°
Precipitation 0 %
Wind 5 mph
Humidity 50 %
Today
Cloudy Night
Day 99°
Night 72°
Precipitation 1 %
Wind 5 mph

Memphis Weather Forecast Updated

9 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 18, 2025)
Cloudy Night

Day

95°

Night

70°

Wind

5 mph

Precipitation

2 %

Air Quality in Memphis

NOW
39 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 9.43 µg/m³
PM10 10.75 µg/m³
O3 0.035 ppm
NO2 3.2 ppb
SO2 0.3 ppb
CO 0.17 ppm
NH3 0.79 µg/m³
NO 0 µg/m³
PM2.5 – 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)
PM2.59.43 µg/m³
PM1010.75 µg/m³
O368.76 µg/m³
NO26.01 µg/m³
SO20.7 µg/m³
CO189.97 µg/m³
NH30.79 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Memphis

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 18 at 12:45PM CDT until September 19 at 8:00PM CDT by NWS Memphis TN
Sep 18, 12:45 PM Sep 19, 8:00 PM
WHAT: Heat index values up to 105.

WHERE: Portions of East Arkansas, North Mississippi, Southeast
Missouri, and West Tennessee.

WHEN: Until 8 PM CDT Saturday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Sep 18, 8:50 PM Source: NWS Alert

Air Quality Alert

Air Quality Alert issued September 18 at 8:00PM CDT by NWS Memphis TN
Sep 18, 8:00 PM Sep 19, 5:30 PM
AQAMEG

The Shelby County Health Department has issued a Code Orange Ozone
Forecast effective for Shelby County Tennessee, Crittenden County
Arkansas, and DeSoto County Mississippi, including the city of
Memphis for Saturday. This ozone forecast is due to forecasted ozone
values that will be unhealthy for sensitive groups. These values will
exceed the Environmental Protection Agency's federal safe health
standard. The Shelby County Health Department recommends that
sensitive groups which include active children and adults, and
people with respiratory disease, such as asthma, limit prolonged
outdoor exertion.

Please continue to check the latest air quality forecasts and updates
until monitored values return to safe levels. For more information go
to www.airnow.gov.
Updated: Sep 18, 8:50 PM Source: NWS Alert