Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 06-Sep-2026 7:45am - next update at 7:50am  
Summary / Temperature Wind Precipitation Outlook


Sunny, Humid
Sunny, Humid

77.8°F Warmer 0.5°F than last hour.
Comfortable
Currently 77.8, Max: 84.6, Min: 77.1 Feels like:
80°F

24-hr
difference
-1.8°FColder 1.8°F than yesterday at this time.
TEMP HIGH LOW
Today 84.6°F
12:00am
77.1°F
6:55am
Yesterday 99.4°F
4:23pm
78.2°F
7:06am
Record 105°F
2023
55°F
1974
Normal 91°F
72°F
 Calm S
0.0
Gust:
0.0
Calm

60-Min Avg: Calm
120-Min Avg: Calm
Max Gust: 8.1 mph 1:50am
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
33 days since last rain
Tonight

Tonight: Clear
Clear

Barometer Humidity/Dew Point Moon
Current: 29.907 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Rising
High: 29.909  |  Low: 29.853
Humidity: 87 % Increased 1% since last hour.
Humidex: 96.5°F
Dewpoint: 73.6°F Increased 0.8°F since last hour.
Wetbulb: 74.9°F
Waning Crescent
Waning Crescent, Moon at 24 days in cycle
26%
Illuminated
Current UV Index Current Solar Energy
   0.0   None
High: 0.0 @ 12:00am
Time to Burn: 720 Mins
Energy: 0 W/m2 (100%)
High: 17 at  7:42am
Apparent Temp: 90.0°F
Heat Index Cooling Degree Days Sun
Current: 79.7°F
Today: 90.4°F  12:00am
Yesterday: 109.5°F
Last Week: 110.9°F
Record: 127.2°F   26-Aug-2023
Today: 5.3
September: 117.6
2026 to Date: 2808.9
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:42 hrs:min
-00:01:59 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:04am
Sunset: 7:46pm
Moonrise: 1:52am
Moonset: 4:50pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.02 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.43 in   
7-Day: -1.43 in 1.43 in water in deficit of what evaporated in last 7 days.
September: -1.14 in 1.14 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.17 kg/m3
Cloud Height: 1712 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:
-0.1 at 07:45 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 100 °F
NWS forecast: Sunny, with a high near 100. Heat index values as high as 104. Southeast wind 0 to 10 mph.
Tonight

Tonight: Clear
Clear

Lo 80 °F
NWS forecast: Clear. Low around 80, with temperatures rising to around 82 overnight. Heat index values as high as 102. South southeast wind 5 to 10 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Clear
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
Thursday

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