Excessive Heat Watch 10:00 PM Excessive Heat Warning — Imperial County Southwest, CA, Salton Sea, CA, Chuckwalla Mountains, CA, Imperial County Southeast, CA, Imperial County West, CA, Imperial Valley, CA, Chiriaco Summit, CA, Palo Verde Valley, CA, Chuckwalla Valley, CA, Joshua Tree NP West, CA, Joshua Tree NP East, CA, Aguila Valley, AZ, Tonopah Desert, AZ, Gila Bend, AZ, Cave Creek/New River, AZ, New River Mesa, AZ, Rio Verde/Salt River, AZ, Fountain Hills/East Mesa, AZ, Superior, AZ, Northwest Pinal County, AZ, West Pinal County, AZ, Apache Junction/Gold Canyon, AZ, Sonoran Desert Natl Monument, AZ, Northwest Valley, AZ, Buckeye/Avondale, AZ, Deer Valley, AZ, Central Phoenix, AZ, North Phoenix/Glendale, AZ, Scottsdale/Paradise Valley, AZ, East Valley, AZ, South Mountain/Ahwatukee, AZ, Southeast Valley/Queen Creek, AZ 10:00 PM

Phoenix, Arizona

Last updated: 6:03 PM CDT  ·  Refresh
39°C
Feels like 40°
Clear
▲ 42°  /  ▼ 27°
Wind
3 mph W
Humidity
27%
Dew Point
16°
Pressure
28.32 inHg
Visibility
10 mi
UV Index
7.4
Cloud Cover
5%
Sunrise
5:33 AM
Sunset
7:35 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Phoenix is currently clear at 39°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 787 J/kg) — isolated convective development possible. Sunrise: 5:33AM · Sunset: 7:35PM.

Alerts

Excessive Heat Watch
Expires 10:00 PM
Excessive Heat Warning
Imperial County Southwest, CA, Salton Sea, CA, Chuckwalla Mountains, CA, Imperial County Southeast, CA, Imperial County West, CA, Imperial Valley, CA, Chiriaco Summit, CA, Palo Verde Valley, CA, Chuckwalla Valley, CA, Joshua Tree NP West, CA, Joshua Tree NP East, CA, Aguila Valley, AZ, Tonopah Desert, AZ, Gila Bend, AZ, Cave Creek/New River, AZ, New River Mesa, AZ, Rio Verde/Salt River, AZ, Fountain Hills/East Mesa, AZ, Superior, AZ, Northwest Pinal County, AZ, West Pinal County, AZ, Apache Junction/Gold Canyon, AZ, Sonoran Desert Natl Monument, AZ, Northwest Valley, AZ, Buckeye/Avondale, AZ, Deer Valley, AZ, Central Phoenix, AZ, North Phoenix/Glendale, AZ, Scottsdale/Paradise Valley, AZ, East Valley, AZ, South Mountain/Ahwatukee, AZ, Southeast Valley/Queen Creek, AZ
Expires 10:00 PM
77 AQI · Moderate Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
39°
6%
5 PM
42°
6%
6 PM
42°
6%
7 PM
40°
9%
8 PM
39°
7%
9 PM
36°
7%
10 PM
36°
7%
11 PM
35°
7%
12 AM
34°
7%
1 AM
32°
7%
2 AM
32°
4%
3 AM
32°
4%
4 AM
31°
4%
5 AM
30°
3%
6 AM
31°
3%
7 AM
32°
3%
8 AM
34°
3%
9 AM
34°
3%
10 AM
36°
3%
11 AM
38°
3%
12 PM
39°
3%
1 PM
40°
3%
2 PM
41°
3%
3 PM
42°
3%
7-Day Forecast
Today
42° 27°
Clear.
Thu
43° 30°
Clear.
Fri
47° 31°
Clear.
Sat
46° 29°
Clear.
Sun
41° 31°
Mostly Cloudy with a 25% chance of rain.
Mon
40° 28°
Rain, 78% chance.
Tue
39° 28°
Mostly Cloudy with a 60% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 39° Clear 6% 3 mph W 27%
5 PM 42° Clear 6% 4 mph NW 25%
6 PM 42° Clear 6% 6 mph NE 28%
7 PM 40° Clear 9% 6 mph NNE 30%
8 PM 39° Clear 7% 8 mph NE 32%
9 PM 36° Clear 7% 6 mph ENE 33%
10 PM 36° Clear 7% 5 mph NE 33%
11 PM 35° Clear 7% 5 mph NE 33%
12 AM 34° Clear 7% 5 mph NE 35%
1 AM 32° Clear 7% 5 mph NE 37%
2 AM 32° Clear 4% 5 mph NE 39%
3 AM 32° Clear 4% 5 mph NE 41%
4 AM 31° Clear 4% 5 mph ENE 44%
5 AM 30° Clear 3% 5 mph ENE 46%
6 AM 31° Clear 3% 5 mph NE 45%
7 AM 32° Clear 3% 4 mph ENE 42%
8 AM 34° Clear 3% 4 mph ENE 38%
9 AM 34° Clear 3% 3 mph E 34%
10 AM 36° Clear 3% 3 mph E 31%
11 AM 38° Clear 3% 3 mph ESE 29%
12 PM 39° Clear 3% 2 mph ESE 28%
1 PM 40° Clear 3% 2 mph ESE 26%
2 PM 41° Clear 3% 3 mph SE 25%
3 PM 42° Clear 3% 3 mph SSE 25%
15-Day Forecast
Today
7/22
Clear
9%
27°
42°
Thu
7/23
Clear
7%
30°
43°
Fri
7/24
Clear
6%
31°
47°
Sat
7/25
Clear
17%
29°
46°
Sun
7/26
Mostly Cloudy
25%
31°
41°
Mon
7/27
Rain
78%
28°
40°
Tue
7/28
Mostly Cloudy
60%
28°
39°
Wed
7/29
Drizzle
66%
28°
40°
Thu
7/30
Drizzle
50%
28°
41°
Fri
7/31
Drizzle
45%
30°
42°
Sat
8/1
Drizzle
60%
29°
42°
Sun
8/2
Clear
25%
31°
41°
Mon
8/3
Drizzle
60%
31°
41°
Tue
8/4
Drizzle
60%
31°
40°
Wed
8/5
Drizzle
60%
31°
39°
77
Moderate
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
24 AQI 4.5 µg/m³
O3
Ground-level ozone
Dominant
77 AQI 63 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 77 Moderate 77 24
Fri 101 Unhealthy for Sensitive Groups 101 33
Sat 101 Unhealthy for Sensitive Groups 101 39
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Wed Jul 22, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE707 J/kg
MLCAPE38 J/kg
MUCAPE707 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-1.7
Kinematics
0–6 km Shear6 kt
0–1 km Shear4 kt
Eff. Shear5 kt
0–1 km SRH-22
0–3 km SRH-27
Eff. SRH-27
Storm Motion12° @ 19 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado-0.0
STP (eff)0.0
Supercell0.0
K-Index36.9
Thermo & Levels
PWAT1.68 in
0–3 km LR9.5 °C/km
700–500 LR5.6 °C/km
Total Totals45.9
LCL692 hPa
LFC959 hPa
EL187 hPa
Freezing Lvl16,099 ft