Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 07-Sep-2026 4:30am - next update at 4:35am  
Summary / Temperature Wind Precipitation Outlook


Night time, Dry, Clear skies
Night time, Dry, Clear skies

80.3°F Colder 1.7°F than last hour.
Warm
Currently 80.3, Max: 86.8, Min: 80.3 Feels like:
84°F

24-hr
difference
1.3°FWarmer 1.3°F than yesterday at this time.
TEMP HIGH LOW
Today 86.8°F
12:00am
80.3°F
4:25am
Yesterday 99.8°F
3:47pm
77.1°F
6:55am
Record 107°F
2023
56°F
1918
Normal 91°F
71°F
 Wind from WSW WSW
0.4
Gust:
0.0
Calm

60-Min Avg: Calm
120-Min Avg: Calm
Max Gust: 8.1 mph 12:01am
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
34 days since last rain
Labor
Day
Labor Day: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.881 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 29.882  |  Low: 29.860
Humidity: 75 % Increased 4% since last hour.
Humidex: 97.1°F
Dewpoint: 71.6°F  
Wetbulb: 74.4°F
Waning Crescent
Waning Crescent, Moon at 25 days in cycle
17%
Illuminated
UV Forecast Current Solar Energy
07-Sep-2026   Very High   9.0   
08-Sep-2026   Very High   8.6   
09-Sep-2026   Very High   8.5   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 86.7°F
Heat Index Cooling Degree Days Sun
Current: 84.2°F
Today: 92.9°F  12:03am
Yesterday: 111.6°F
Last Week: 111.6°F
Record: 127.2°F   26-Aug-2023
Today: 3.3
September: 139.0
2026 to Date: 2830.4
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:40 hrs:min
-00:01:58 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:05am
Sunset: 7:45pm
Moonrise: 3:02am
Moonset: 5:36pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.03 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.35 in   
7-Day: -1.35 in 1.35 in water in deficit of what evaporated in last 7 days.
September: -1.35 in 1.35 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.16 kg/m3
Cloud Height: 2735 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:1 ISS:Ok CON:4.6 RCP:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
2.8 at 04:30 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  -   Overnight's and Labor Day's Outlook
Overnight

Overnight: Clear
Clear

Lo 80 °F
NWS forecast: Clear, with a low around 80. South southwest wind 0 to 5 mph.
Labor
Day
Labor Day: Sunny
Sunny

Hi 100 °F
NWS forecast: Sunny, with a high near 100. Heat index values as high as 104. South wind 0 to 10 mph, with gusts as high as 20 mph.
 NWS NWS Short Term Weather Forecast
Labor
Day
Labor Day: Sunny
Sunny
Monday
Night
Monday Night: Clear
Clear
Tuesday

Tuesday: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms then Mostly Clear
Slight Chance Showers And T-Storms then Mostly 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
Hi 100 °F Lo 80 °F Hi 100 °F Lo 80 °F Hi 100 °F Lo 79 °F Hi 98 °F Lo 79 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.