Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 27-Aug-2026 6:20pm - next update at 6:25pm  
Summary / Temperature Wind Precipitation Outlook


Overcast, Dry
Overcast, Dry

96.4°F Colder 1.7°F than last hour.
Dangerously Hot
Currently 96.4, Max: 99.8, Min: 77.8 Feels like:
100°F

24-hr
difference
-1.8°FColder 1.8°F than yesterday at this time.
TEMP HIGH LOW
Today 99.8°F
4:10pm
77.8°F
7:03am
Yesterday 101.7°F
4:44pm
83.1°F
7:10am
Record 107°F
1901
61°F
1906
Normal 94°F
74°F
 Wind from ENE ENE
3.5
Gust:
1.1
Light Breeze

60-Min Avg: 8.1 mph
120-Min Avg: 6.9 mph
Max Gust: 18.7 mph 4:09pm
Month: 30.8 mph Aug 9
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
8/4/2026
6:09 PM
August: 0.01 in
Last 7 Days: 0.00 in
Rain Season:1 22.54 in
Rain Days: 58 in 2026
23 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 29.873 inHg Falling 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Falling
High: 29.975  |  Low: 29.872
Humidity: 37 % Increased 1% since last hour.
Humidex: 108.3°F
Dewpoint: 65.9°F Decreased 0.7°F since last hour.
Wetbulb: 76.1°F
Full Moon
Full Moon, Moon at 14 days in cycle
100%
Illuminated
Current UV Index Current Solar Energy
   0.0   None
High: 5.3 @ 1:35pm
Time to Burn: 720 Mins
Energy: 0 W/m2 (7%)
High: 859 at  1:35pm
Apparent Temp: 105.5°F
Heat Index Cooling Degree Days Sun
Current: 99.7°F
Today: 109.1°F  1:38pm
Yesterday: 110.7°F
Last Week: 116.0°F
Record: 127.2°F   26-Aug-2023
Today: 14.3
August: 686.6
2026 to Date: 2580.6
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:01 hrs:min
-00:01:54 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:58am
Sunset: 7:59pm
Moonrise: 7:24pm
Moonset: 6:22am
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.29 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.87 in   
7-Day: -1.87 in 1.87 in water in deficit of what evaporated in last 7 days.
August: -7.77 in 7.77 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 7740 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:0 ISS:Ok CON:4.6 RCP:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
45.0 at 6:20 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: Mostly Sunny
Mostly Sunny

Hi 99 °F
NWS forecast: Mostly sunny, with a high near 99. Heat index values as high as 104. East northeast wind around 15 mph.
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 78 °F
NWS forecast: Mostly clear. Low around 78, with temperatures rising to around 80 overnight. Heat index values as high as 101. East southeast wind 5 to 15 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Mostly Clear
Mostly Clear
Friday

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

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

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Clear
Clear
Monday

Monday: Sunny
Sunny
Lo 78 °F Hi 100 °F Lo 79 °F Hi 100 °F Lo 79 °F Hi 100 °F Lo 79 °F Hi 100 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.