Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 05-Sep-2026 6:45pm - next update at 6:50pm  
Summary / Temperature Wind Precipitation Outlook


Partly cloudy, Dry
Partly cloudy, Dry

96.4°F Colder 1.4°F than last hour.
Dangerously Hot
Currently 96.4, Max: 99.4, Min: 78.2 Feels like:
102°F

24-hr
difference
2.5°FWarmer 2.5°F than yesterday at this time.
TEMP HIGH LOW
Today 99.4°F
4:23pm
78.2°F
7:06am
Yesterday 100.4°F
3:28pm
75.7°F
6:59am
Record 104°F
2023
55°F
1974
Normal 92°F
72°F
 Wind from S S
2.9
Gust:
2.2
Light Air

60-Min Avg: 3.5 mph
120-Min Avg: 3.5 mph
Max Gust: 17.6 mph 12:55pm
Month: 23.1 mph Sep 3
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
8/4/2026
6:09 PM
September: 0.00 in
Last 7 Days: 0.00 in
Rain Season:1 22.54 in
Rain Days: 58 in 2026
32 days since last rain
Sunday

Sunday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.804 inHg  
1-Hr Trend: Steady
3-Hr Trend: Falling
High: 29.940  |  Low: 29.799
Humidity: 41 % Increased 1% since last hour.
Humidex: 110.8°F
Dewpoint: 68.9°F Decreased 0.5°F since last hour.
Wetbulb: 77.7°F
Waning Crescent
Waning Crescent, Moon at 23 days in cycle
31%
Illuminated
Current UV Index Current Solar Energy
   0.0   None
High: 5.0 @ 1:00pm
Time to Burn: 720 Mins
Energy: 0 W/m2 (51%)
High: 839 at  1:33pm
Apparent Temp: 106.8°F
Heat Index Cooling Degree Days Sun
Current: 102.3°F
Today: 109.5°F  2:02pm
Yesterday: 111.4°F
Last Week: 110.9°F
Record: 127.2°F   26-Aug-2023
Today: 15.4
September: 103.6
2026 to Date: 2794.8
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:43 hrs:min
-00:01:57 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:04am
Sunset: 7:47pm
Moonrise: 12:46am
Moonset: 3:56pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.24 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.50 in   
7-Day: -1.5 in 1.5 in water in deficit of what evaporated in last 7 days.
September: -0.93 in 0.93 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 7059 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:19 ISS:Ok CON:4.6 RCP:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
36.5 at 6:45 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  -   Tonight's and Sunday's Outlook
Tonight

Tonight: Clear
Clear

Lo 79 °F
NWS forecast: Clear. Low around 79, with temperatures rising to around 81 overnight. Heat index values as high as 103. South southeast wind 0 to 10 mph.
Sunday

Sunday: Sunny
Sunny

Hi 100 °F
NWS forecast: Sunny. High near 100, with temperatures falling to around 98 in the afternoon. Heat index values as high as 103. East southeast wind 0 to 10 mph.
 NWS NWS Short Term Weather Forecast
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Labor
Day
Labor Day: Sunny
Sunny
Monday
Night
Monday Night: 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
Hi 100 °F Lo 80 °F Hi 101 °F Lo 80 °F Hi 101 °F Lo 80 °F Hi 100 °F Lo 79 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.