Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
spacer
Updated: @ 13-Aug-2026 2:00pm - next update at 2:05pm  
Summary / Temperature Wind Precipitation Outlook


Mostly sunny, Dry
Mostly sunny, Dry

98.7°F Warmer 1.5°F than last hour.
Dangerously Hot
Currently 98.7, Max: 98.7, Min: 81.1 Feels like:
106°F

24-hr
difference
-1°FColder 1°F than yesterday at this time.
TEMP HIGH LOW
Today 98.7°F
1:59pm
81.1°F
7:00am
Yesterday 101.7°F
3:51pm
80.3°F
6:55am
Record 106°F
2023
56°F
1967
Normal 97°F
76°F
 Wind from SSW SSW
7.8
Gust:
13.2
Gentle Breeze

60-Min Avg: 11.5 mph
120-Min Avg: 5.8 mph
Max Gust: 27.6 mph 2:20am
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
9 days since last rain
Tonight

Tonight: Clear
Clear

Barometer Humidity/Dew Point Moon
Current: 29.882 inHg Falling 0.03 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling
High: 29.927  |  Low: 29.822
Humidity: 40 % Decreased 1% since last hour.
Humidex: 114.2°F
Dewpoint: 70.2°F Increased 0.4°F since last hour.
Wetbulb: 79.1°F
Waxing Crescent
Waxing Crescent, Moon at 1 days in cycle
2%
Illuminated
Current UV Index Current Solar Energy
   5.3    Medium 
High: 5.3 @ 1:06pm
Time to Burn: 21 Mins
Energy: 0 W/m2 (76%)
High: 823 at  1:29pm
Apparent Temp: 117.3°F
Heat Index Cooling Degree Days Sun
Current: 106.3°F
Today: 107.4°F  1:43pm
Yesterday: 115.0°F
Last Week: 114.7°F
Record: 127.2°F   26-Aug-2023
Today: 12.0
August: 296.9
2026 to Date: 2190.0
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:27 hrs:min
-00:01:44 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:48am
Sunset: 8:15pm
Moonrise: 7:41am
Moonset: 8:20pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.34 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.17 in   
7-Day: -2.17 in 2.17 in water in deficit of what evaporated in last 7 days.
August: -3.61 in 3.61 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 7281 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:
38.9 at 2:00 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  -   This Afternoon's and Tonight's Outlook
This
Afternoon
This Afternoon: Sunny
Sunny

Hi 101 °F
NWS forecast: Sunny, with a high near 101. Heat index values as high as 106. South southwest wind around 15 mph, with gusts as high as 25 mph.
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 104. South wind 10 to 15 mph, with gusts as high as 25 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Clear
Clear
Friday

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

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday

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

Monday: Sunny
Sunny
Lo 79 °F Hi 100 °F Lo 81 °F Hi 100 °F Lo 81 °F Hi 101 °F Lo 80 °F Hi 102 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.