Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 14-Sep-2026 2:10pm - next update at 2:15pm  
Summary / Temperature Wind Precipitation Outlook


Sunny, Dry
Sunny, Dry

98.4°F Warmer 2°F than last hour.
Dangerously Hot
Currently 98.4, Max: 99.4, Min: 79.6 Feels like:
106°F

24-hr
difference
-0.7°FColder 0.7°F than yesterday at this time.
TEMP HIGH LOW
Today 99.4°F
1:57pm
79.6°F
7:30am
Yesterday 101.1°F
3:37pm
79.1°F
7:17am
Record 102°F
1953
48°F
1902
Normal 89°F
69°F
 Wind from SW SW
10.8
Gust:
7.7
Gentle Breeze

60-Min Avg: 5.8 mph
120-Min Avg: 4.6 mph
Max Gust: 17.6 mph 11:44am
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
41 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 29.950 inHg Falling 0.03 °F/hr
1-Hr Trend: Falling
3-Hr Trend: Falling
High: 30.020  |  Low: 29.948
Humidity: 41 % Decreased 6% since last hour.
Humidex: 114.3°F
Dewpoint: 70.6°F Decreased 2.2°F since last hour.
Wetbulb: 79.2°F
Waxing Crescent
Waxing Crescent, Moon at 3 days in cycle
15%
Illuminated
Current UV Index Current Solar Energy
   4.4    Medium 
High: 4.7 @ 1:15pm
Time to Burn: 25 Mins
Energy: 0 W/m2 (92%)
High: 806 at  2:05pm
Apparent Temp: 114.9°F
Heat Index Cooling Degree Days Sun
Current: 106.0°F
Today: 109.2°F  1:54pm
Yesterday: 109.5°F
Last Week: 116.5°F
Record: 127.2°F   26-Aug-2023
Today: 11.4
September: 315.6
2026 to Date: 3007.4
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:25 hrs:min
-00:02:00 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:10am
Sunset: 7:35pm
Moonrise: 10:41am
Moonset: 8:45pm
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: 1.74 in   
7-Day: -1.74 in 1.74 in water in deficit of what evaporated in last 7 days.
September: -3.1 in 3.1 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 7108 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:19 ISS:Ok CON:4.6 RCP:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
36.8 at 2:10 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  -   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 105. South wind 10 to 15 mph, with gusts as high as 25 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 10 to 15 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Mostly Clear
Mostly Clear
Tuesday

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

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday

Friday: Sunny
Sunny
Lo 80 °F Hi 100 °F Lo 80 °F Hi 99 °F Lo 79 °F Hi 98 °F Lo 77 °F Hi 98 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.