Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 09-Sep-2026 3:45pm - next update at 3:50pm  
Summary / Temperature Wind Precipitation Outlook


Sunny, Dry
Sunny, Dry

100.0°F Warmer 2.6°F than last hour.
Dangerously Hot
Currently 100.0, Max: 100.9, Min: 80.7 Feels like:
108°F

24-hr
difference
-0.6°FColder 0.6°F than yesterday at this time.
TEMP HIGH LOW
Today 100.9°F
3:26pm
80.7°F
7:17am
Yesterday 102.4°F
3:25pm
80.6°F
7:11am
Record 101°F
1954
55°F
1956
Normal 91°F
71°F
 Wind from S S
6.8
Gust:
8.8
Light Breeze

60-Min Avg: 6.9 mph
120-Min Avg: 3.5 mph
Max Gust: 19.8 mph 1:10am
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
36 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 29.977 inHg Falling 0.03 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling
High: 30.090  |  Low: 29.975
Humidity: 39 % Decreased 4% since last hour.
Humidex: 115.9°F
Dewpoint: 70.6°F  
Wetbulb: 79.7°F
Waning Crescent
Waning Crescent, Moon at 28 days in cycle
2%
Illuminated
Current UV Index Current Solar Energy
   2.8    Low 
High: 4.6 @ 1:14pm
Time to Burn: 40 Mins
Energy: 0 W/m2 (100%)
High: 815 at  2:05pm
Apparent Temp: 117.0°F
Heat Index Cooling Degree Days Sun
Current: 108.0°F
Today: 111.0°F  2:15pm
Yesterday: 113.7°F
Last Week: 113.5°F
Record: 127.2°F   26-Aug-2023
Today: 13.4
September: 200.6
2026 to Date: 2892.1
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:36 hrs:min
-00:02:00 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:06am
Sunset: 7:42pm
Moonrise: 5:22am
Moonset: 6:49pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.32 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.63 in   
7-Day: -1.63 in 1.63 in water in deficit of what evaporated in last 7 days.
September: -1.87 in 1.87 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 7485 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:9 ISS:Ok CON:4.6 RCP:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
41.2 at 3:45 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 100 °F
NWS forecast: Sunny, with a high near 100. Heat index values as high as 105. South southeast wind around 10 mph.
Tonight

Tonight: Mostly Clear
Mostly Clear

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

Tonight: Mostly Clear
Mostly Clear
Thursday

Thursday: Sunny then Chance Showers And Thunderstorms
Sunny then Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday

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

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

Sunday: Sunny
Sunny
Lo 80 °F Hi 99 °F Lo 79 °F Hi 98 °F Lo 79 °F Hi 100 °F Lo 79 °F Hi 99 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.