Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
spacer
Updated: @ 15-Aug-2026 6:50am - next update at 6:55am  
Summary / Temperature Wind Precipitation Outlook


Dawn
Dawn

81.1°F Colder 1°F than last hour.
Warm
Currently 81.1, Max: 88.4, Min: 81.0 Feels like:
86°F

24-hr
difference
1.4°FWarmer 1.4°F than yesterday at this time.
TEMP HIGH LOW
Today 88.4°F
12:00am
81.0°F
6:48am
Yesterday 102.4°F
4:07pm
79.3°F
7:06am
Record 107°F
1951
64°F
1955
Normal 96°F
76°F
 Wind from S S
6.3
Gust:
9.9
Light Breeze

60-Min Avg: 8.1 mph
120-Min Avg: 5.8 mph
Max Gust: 19.8 mph 4:57am
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
11 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 30.050 inHg Rising 0.02 °F/hr
1-Hr Trend: Rising slowly
3-Hr Trend: Rising slowly
High: 30.052  |  Low: 30.013
Humidity: 74 % Increased 2% since last hour.
Humidex: 98.3°F
Dewpoint: 72.0°F Decreased 0.2°F since last hour.
Wetbulb: 74.9°F
Waxing Crescent
Waxing Crescent, Moon at 2 days in cycle
10%
Illuminated
UV Forecast Current Solar Energy
15-Aug-2026   Very High   10.8   
16-Aug-2026   Very High   9.6   
17-Aug-2026   Very High   9.1   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 84.5°F
Heat Index Cooling Degree Days Sun
Current: 85.5°F
Today: 96.0°F  12:00am
Yesterday: 111.3°F
Last Week: 114.7°F
Record: 127.2°F   26-Aug-2023
Today: 5.8
August: 342.6
2026 to Date: 2235.9
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:23 hrs:min
-00:01:45 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:50am
Sunset: 8:13pm
Moonrise: 9:52am
Moonset: 9:22pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.09 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.34 in   
7-Day: -2.34 in 2.34 in water in deficit of what evaporated in last 7 days.
August: -4.39 in 4.39 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.17 kg/m3
Cloud Height: 2832 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:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
3.2 at 06:50 AM
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 101 °F
NWS forecast: Sunny, with a high near 101. Heat index values as high as 106. South southwest wind around 10 mph, with gusts as high as 20 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 104. South southwest wind around 10 mph, with gusts as high as 20 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Mostly Clear
Mostly Clear
Sunday

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

Monday: Sunny
Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday

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

Wednesday: Sunny
Sunny
Lo 81 °F Hi 102 °F Lo 80 °F Hi 102 °F Lo 81 °F Hi 102 °F Lo 81 °F Hi 103 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.