Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 14-Sep-2026 4:30am - next update at 4:35am  
Summary / Temperature Wind Precipitation Outlook


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

81.6°F Colder 1.7°F than last hour.
Warm
Currently 81.6, Max: 88.1, Min: 81.6 Feels like:
86°F

24-hr
difference
-0.8°FColder 0.8°F than yesterday at this time.
TEMP HIGH LOW
Today 88.1°F
12:00am
81.6°F
4:26am
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 S S
4.5
Gust:
4.4
Light Breeze

60-Min Avg: 2.3 mph
120-Min Avg: 1.2 mph
Max Gust: 16.5 mph 12:50am
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
Monday

Monday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.973 inHg  
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 29.978  |  Low: 29.959
Humidity: 74 % Increased 5% since last hour.
Humidex: 99.2°F
Dewpoint: 72.5°F Increased 0.3°F since last hour.
Wetbulb: 75.4°F
Waxing Crescent
Waxing Crescent, Moon at 3 days in cycle
12%
Illuminated
UV Forecast Current Solar Energy
14-Sep-2026   High   7.9   
15-Sep-2026   Very High   8.0   
16-Sep-2026   High   7.8   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 86.2°F
Heat Index Cooling Degree Days Sun
Current: 86.3°F
Today: 93.8°F  12:09am
Yesterday: 109.5°F
Last Week: 116.5°F
Record: 127.2°F   26-Aug-2023
Today: 3.5
September: 307.7
2026 to Date: 2999.5
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: 0.08 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: 1.16 kg/m3
Cloud Height: 2837 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:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
3.3 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 Monday's Outlook
Overnight

Overnight: Clear
Clear

Lo 80 °F
NWS forecast: Clear. Low around 80, with temperatures rising to around 82 overnight. South wind around 10 mph.
Monday

Monday: 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.
 NWS NWS Short Term Weather Forecast
Monday

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