Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 15-Sep-2026 10:05pm - next update at 10:10pm  
Summary / Temperature Wind Precipitation Outlook
Record High

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

89.5°F Colder 2.4°F than last hour.
Warm
Currently 89.5, Max: 101.0, Min: 80.0 Feels like:
97°F

24-hr
difference
-0.9°FColder 0.9°F than yesterday at this time.
TEMP HIGH LOW
Today 101.0°F
3:16pm
80.0°F
7:25am
Yesterday 99.8°F
2:39pm
79.6°F
7:30am
Record 100°F
1980
51°F
1993
Normal 89°F
69°F
 Wind from ESE ESE
5.6
Gust:
2.2
Light Breeze

60-Min Avg: 5.8 mph
120-Min Avg: 10.4 mph
Max Gust: 22.0 mph 1:23am
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
42 days since last rain
Wednesday

Wednesday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 30.006 inHg Rising 0.03 °F/hr
1-Hr Trend: Rising
3-Hr Trend: Rising
High: 30.035  |  Low: 29.921
Humidity: 57 % Increased 10% since last hour.
Humidex: 106.9°F
Dewpoint: 72.3°F Increased 3.4°F since last hour.
Wetbulb: 77.6°F
Waxing Crescent
Waxing Crescent, Moon at 4 days in cycle
25%
Illuminated
UV Forecast Current Solar Energy
16-Sep-2026   Very High   8.0   
17-Sep-2026   High   7.7   
18-Sep-2026   High   7.9   
Energy: 0 W/m2 (0%)
High: 737 at  1:25pm
Apparent Temp: 93.7°F
Heat Index Cooling Degree Days Sun
Current: 96.9°F
Today: 111.0°F  3:48pm
Yesterday: 109.4°F
Last Week: 116.5°F
Record: 127.2°F   26-Aug-2023
Today: 19.6
September: 348.4
2026 to Date: 3040.2
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:22 hrs:min
-00:02:00 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:11am
Sunset: 7:33pm
Moonrise: 12:44pm
Moonset: 9:52pm
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.31 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.79 in   
7-Day: -1.79 in 1.79 in water in deficit of what evaporated in last 7 days.
September: -3.38 in 3.38 in water in deficit of what evaporated this month.
Irrigation System: Ready
Other Conditions
Air Density: 1.15 kg/m3
Cloud Height: 4703 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:
13.9 at 10:05 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  -   Tonight's and Wednesday's Outlook
Tonight

Tonight: Clear
Clear

Lo 81 °F
NWS forecast: Clear, with a low around 81. Heat index values as high as 101. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday

Wednesday: Sunny
Sunny

Hi 99 °F
NWS forecast: Sunny, with a high near 99. Heat index values as high as 104. South wind 5 to 10 mph.
 NWS NWS Short Term Weather Forecast
Wednesday

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

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

Friday: Sunny
Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Saturday

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Hi 99 °F Lo 80 °F Hi 99 °F Lo 79 °F Hi 99 °F Lo 77 °F Hi 99 °F Lo 77 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.