Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
spacer
Updated: @ 12-Sep-2026 10:20pm - next update at 10:25pm  
Summary / Temperature Wind Precipitation Outlook


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

91.4°F Colder 1.2°F than last hour.
Hot
Currently 91.4, Max: 102.7, Min: 76.1 Feels like:
98°F

24-hr
difference
6.8°FWarmer 6.8°F than yesterday at this time.
TEMP HIGH LOW
Today 102.7°F
4:22pm
76.1°F
7:16am
Yesterday 100.2°F
4:19pm
77.4°F
4:51am
Record 103°F
2011
50°F
1902
Normal 90°F
70°F
 Wind from S S
5.9
Gust:
5.5
Light Breeze

60-Min Avg: 9.2 mph
120-Min Avg: 5.8 mph
Max Gust: 19.8 mph 10:05pm
Month: 26.5 mph Sep 11
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
39 days since last rain
Sunday

Sunday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.882 inHg Rising 0.03 °F/hr
1-Hr Trend: Rising
3-Hr Trend: Rising
High: 29.902  |  Low: 29.789
Humidity: 51 % Increased 3% since last hour.
Humidex: 107.4°F
Dewpoint: 70.7°F Increased 0.7°F since last hour.
Wetbulb: 77.3°F
Waxing Crescent
Waxing Crescent, Moon at 2 days in cycle
5%
Illuminated
UV Forecast Current Solar Energy
13-Sep-2026   Very High   8.2   
14-Sep-2026   High   7.5   
15-Sep-2026   Very High   8.3   
Energy: 0 W/m2 (0%)
High: 750 at  1:27pm
Apparent Temp: 95.0°F
Heat Index Cooling Degree Days Sun
Current: 97.5°F
Today: 116.8°F  2:12pm
Yesterday: 112.5°F
Last Week: 116.5°F
Record: 127.2°F   26-Aug-2023
Today: 16.0
September: 271.4
2026 to Date: 2963.1
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:28 hrs:min
-00:02:02 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:09am
Sunset: 7:37pm
Moonrise: 9:39am
Moonset: 8:16pm
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.27 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.66 in   
7-Day: -1.66 in 1.66 in water in deficit of what evaporated in last 7 days.
September: -2.59 in 2.59 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.14 kg/m3
Cloud Height: 5487 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:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
20.4 at 10:20 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: 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 102. South southeast wind 5 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 104. South wind 5 to 10 mph.
 NWS NWS Short Term Weather Forecast
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Clear
Clear
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Clear
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 81 °F Hi 100 °F Lo 80 °F Hi 99 °F Lo 79 °F Hi 99 °F Lo 79 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.