Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 22-Sep-2026 12:55am - next update at 1:00am  
Summary / Temperature Wind Precipitation Outlook


Night time, Dry, Clear skies
Night time, Dry, Clear skies

79.6°F Colder 1°F than last hour.
Warm
Currently 79.6, Max: 80.7, Min: 79.6 Feels like:
83°F

24-hr
difference
-1.2°FColder 1.2°F than yesterday at this time.
TEMP HIGH LOW
Today 80.7°F
12:00am
79.6°F
12:52am
Yesterday 98.9°F
3:22pm
73.8°F
6:57am
Record 101°F
2005
45°F
1983
Normal 87°F
66°F
 Calm ESE
0.0
Gust:
0.0
Calm

60-Min Avg: 2.3 mph
120-Min Avg: 2.3 mph
Max Gust: 4.6 mph 12:04am
Month: 27.5 mph Sep 20
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
7/19/2026
7:44 PM
September: 0.00 in
Last 7 Days: 0.00 in
Rain Season:1 22.54 in
Rain Days: 57 in 2026
65 days since last rain
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny

Barometer Humidity/Dew Point Moon
Current: 29.925 inHg  
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 29.930  |  Low: 29.922
Humidity: 72 % Increased 3% since last hour.
Humidex: 94.8°F
Dewpoint: 69.8°F Increased 0.3°F since last hour.
Wetbulb: 73.0°F
Waxing Gibbous
Waxing Gibbous, Moon at 10 days in cycle
80%
Illuminated
UV Forecast Current Solar Energy
22-Sep-2026   Very High   8.2   
23-Sep-2026   High   7.8   
24-Sep-2026   Very High   8.0   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 85.6°F
Heat Index Cooling Degree Days Sun
Current: 82.5°F
Today: 84.0°F  12:00am
Yesterday: 106.3°F
Last Week: 110.8°F
Record: 127.2°F   26-Aug-2023
Today: 0.3
September: 487.8
2026 to Date: 3180.1
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:09 hrs:min
-00:02:02 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:15am
Sunset: 7:24pm
Moonrise: 5:22pm
Moonset: 3:07am
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.03 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.69 in   
7-Day: -1.69 in 1.69 in water in deficit of what evaporated in last 7 days.
September: -5.06 in 5.06 in water in deficit of what evaporated this month.
Irrigation System: Ready
Other Conditions
Air Density: 1.17 kg/m3
Cloud Height: 3004 ft
HIGHS: LOWS:
111.0°F
Aug 18 2023
-2.0°F
Feb 16 2021
Daytime Records
108.1°F
Aug 19 2024
3.6°F
Feb 15 2021
Nitetime Records
95.2°F
Aug 11 2023
2.1°F
Feb 16 2021
ICN:1 ISS:Ok CON:4.6 RCP:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
3.9 at 00:55 AM
1 Rain season: Jan 1st to Dec 31st.    5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present.)
 NWS Weather Forecast  -   Tonight's and Tuesday's Outlook
Tonight

Tonight: Chance Showers And Thunderstorms then Mostly Clear
Chance Showers And T-Storms then Mostly Clear

Lo 74 °F
NWS forecast: A chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 74. Northeast wind 0 to 5 mph. Chance of precipitation is 30%.
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny

Hi 95 °F
NWS forecast: Mostly sunny. High near 95, with temperatures falling to around 93 in the afternoon. Heat index values as high as 102. North northeast wind 5 to 10 mph.
 NWS NWS Short Term Weather Forecast
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday

Friday: Mostly Sunny
Mostly Sunny
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Hi 95 °F Lo 73 °F Hi 94 °F Lo 72 °F Hi 93 °F Lo 71 °F Hi 93 °F Lo 73 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.