Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 17-Aug-2026 12:25pm - next update at 12:30pm  
Summary / Temperature Wind Precipitation Outlook


Mostly sunny, Dry
Mostly sunny, Dry

98.0°F Warmer 1.3°F than last hour.
Dangerously Hot
Currently 98.0, Max: 98.1, Min: 80.1 Feels like:
103°F

24-hr
difference
1°FWarmer 1°F than yesterday at this time.
TEMP HIGH LOW
Today 98.1°F
12:21pm
80.1°F
7:11am
Yesterday 103.9°F
3:58pm
82.0°F
7:13am
Record 109°F
2023
63°F
1992
Normal 96°F
76°F
 Wind from WNW WNW
2.7
Gust:
2.2
Light Air

60-Min Avg: 5.8 mph
120-Min Avg: 3.5 mph
Max Gust: 12.7 mph 12:07pm
Month: 30.8 mph Aug 9
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
8/4/2026
6:09 PM
August: 0.01 in
Last 7 Days: 0.00 in
Rain Season:1 22.54 in
Rain Days: 58 in 2026
13 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 30.047 inHg Falling 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 30.064  |  Low: 29.991
Humidity: 38 % Decreased 1% since last hour.
Humidex: 111.7°F
Dewpoint: 68.1°F Increased 0.4°F since last hour.
Wetbulb: 77.7°F
Waxing Crescent
Waxing Crescent, Moon at 5 days in cycle
27%
Illuminated
Current UV Index Current Solar Energy
   4.7    Medium 
High: 4.7 @ 12:23pm
Time to Burn: 24 Mins
Energy: 0 W/m2 (75%)
High: 775 at  12:24pm
Apparent Temp: 117.9°F
Heat Index Cooling Degree Days Sun
Current: 103.4°F
Today: 104.3°F  12:05pm
Yesterday: 108.5°F
Last Week: 114.7°F
Record: 127.2°F   26-Aug-2023
Today: 10.3
August: 400.5
2026 to Date: 2293.9
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:20 hrs:min
-00:01:48 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:51am
Sunset: 8:11pm
Moonrise: 11:56am
Moonset: 10:18pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.20 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.39 in   
7-Day: -2.39 in 2.39 in water in deficit of what evaporated in last 7 days.
August: -5.05 in 5.05 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 7606 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:0 ISS:Ok CON:4.6 RCP:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
43.0 at 12:25 PM
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  -   Today's and Tonight's Outlook
Today

Today: Sunny
Sunny

Hi 105 °F
NWS forecast: Sunny, with a high near 105. Heat index values as high as 105. West southwest wind around 5 mph.
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 81 °F
NWS forecast: Mostly clear. Low around 81, with temperatures rising to around 83 overnight. Heat index values as high as 103. South southeast wind around 5 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Sunny
Sunny
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Lo 81 °F Hi 105 °F Lo 82 °F Hi 103 °F Lo 82 °F Hi 102 °F Lo 81 °F Hi 101 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.