Extreme Heat Warning EXTREME HEAT WARNING - Plano, Collin County, Texas
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Updated: @ 24-Aug-2026 1:05pm - next update at 1:10pm  
Summary / Temperature Wind Precipitation Outlook


Mostly sunny, Dry
Mostly sunny, Dry

103.9°F Warmer 2.4°F than last hour.
Dangerously Hot
Currently 103.9, Max: 104.8, Min: 84.4 Feels like:
111°F

24-hr
difference
1°FWarmer 1°F than yesterday at this time.
TEMP HIGH LOW
Today 104.8°F
12:57pm
84.4°F
6:44am
Yesterday 108.2°F
3:28pm
81.7°F
7:27am
Record 107°F
2023
60°F
1961
Normal 95°F
75°F
 Wind from W W
4.9
Gust:
11.0
Light Breeze

60-Min Avg: 5.8 mph
120-Min Avg: 3.5 mph
Max Gust: 18.7 mph 10:18am
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
20 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 29.890 inHg Falling 0.02 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling slowly
High: 29.917  |  Low: 29.838
Humidity: 31 % Decreased 3% since last hour.
Humidex: 117.0°F
Dewpoint: 67.3°F Decreased 0.7°F since last hour.
Wetbulb: 79.0°F
Waxing Gibbous
Waxing Gibbous, Moon at 11 days in cycle
89%
Illuminated
Current UV Index Current Solar Energy
   2.9    Low 
High: 5.2 @ 12:53pm
Time to Burn: 39 Mins
Energy: 0 W/m2 (31%)
High: 967 at  12:56pm
Apparent Temp: 117.2°F
Heat Index Cooling Degree Days Sun
Current: 110.5°F
Today: 111.7°F  12:57pm
Yesterday: 116.2°F
Last Week: 116.0°F
Record: 127.2°F   26-Aug-2023
Today: 13.7
August: 601.9
2026 to Date: 2495.7
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:07 hrs:min
-00:01:52 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:56am
Sunset: 8:03pm
Moonrise: 6:16pm
Moonset: 3:20am
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.29 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.91 in   
7-Day: -1.91 in 1.91 in water in deficit of what evaporated in last 7 days.
August: -6.95 in 6.95 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.12 kg/m3
Cloud Height: 9132 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: MODERATE
Currently:
62.6 at 1:05 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: Mostly Sunny
Mostly Sunny

Hi 107 °F
NWS forecast: Mostly sunny, with a high near 107. Heat index values as high as 106. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 84 °F
NWS forecast: Mostly clear. Low around 84, with temperatures rising to around 86 overnight. Heat index values as high as 105. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
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: Sunny
Sunny
Lo 84 °F Hi 105 °F Lo 82 °F Hi 102 °F Lo 79 °F Hi 99 °F Lo 77 °F Hi 100 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.