Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 13-Sep-2026 3:25pm - next update at 3:30pm  
Summary / Temperature Wind Precipitation Outlook


Sunny, Dry
Sunny, Dry

100.1°F Warmer 0.4°F than last hour.
Dangerously Hot
Currently 100.1, Max: 101.0, Min: 79.1 Feels like:
107°F

24-hr
difference
-1.2°FColder 1.2°F than yesterday at this time.
TEMP HIGH LOW
Today 101.0°F
3:12pm
79.1°F
7:17am
Yesterday 102.7°F
4:22pm
76.1°F
7:16am
Record 107°F
2011
48°F
1902
Normal 89°F
70°F
 Wind from S S
6.1
Gust:
9.9
Light Breeze

60-Min Avg: 9.2 mph
120-Min Avg: 4.6 mph
Max Gust: 19.8 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
40 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 29.901 inHg Falling 0.02 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling
High: 29.996  |  Low: 29.881
Humidity: 36 % Decreased 3% since last hour.
Humidex: 114.0°F
Dewpoint: 68.3°F Decreased 2°F since last hour.
Wetbulb: 78.5°F
Waxing Crescent
Waxing Crescent, Moon at 2 days in cycle
8%
Illuminated
Current UV Index Current Solar Energy
   3.2    Medium 
High: 4.7 @ 12:28pm
Time to Burn: 35 Mins
Energy: 0 W/m2 (93%)
High: 826 at  12:41pm
Apparent Temp: 116.7°F
Heat Index Cooling Degree Days Sun
Current: 107.1°F
Today: 109.5°F  2:17pm
Yesterday: 116.8°F
Last Week: 116.5°F
Record: 127.2°F   26-Aug-2023
Today: 12.7
September: 292.1
2026 to Date: 2983.8
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:28 hrs:min
-00:02:02 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:09am
Sunset: 7:37pm
Moonrise: 9:39am
Moonset: 8:16pm
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.27 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.71 in   
7-Day: -1.71 in 1.71 in water in deficit of what evaporated in last 7 days.
September: -2.85 in 2.85 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.12 kg/m3
Cloud Height: 8024 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:
48.1 at 3:25 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 104. South southeast wind around 10 mph, with gusts as high as 20 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 southeast wind 5 to 10 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Mostly Clear
Mostly Clear
Monday

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