Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 16-Aug-2026 9:50pm - next update at 9:55pm  
Summary / Temperature Wind Precipitation Outlook


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

91.8°F Warmer 0.7°F than last hour.
Hot
Currently 91.8, Max: 103.9, Min: 82.0 Feels like:
91°F

24-hr
difference
-0.8°FColder 0.8°F than yesterday at this time.
TEMP HIGH LOW
Today 103.9°F
3:58pm
82.0°F
7:13am
Yesterday 101.4°F
4:12pm
80.7°F
7:16am
Record 110°F
1943
62°F
1992
Normal 96°F
76°F
 Wind from SSE SSE
4.7
Gust:
5.5
Light Breeze

60-Min Avg: 2.3 mph
120-Min Avg: 1.2 mph
Max Gust: 24.2 mph 12:46am
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
12 days since last rain
Monday

Monday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.970 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 30.107  |  Low: 29.948
Humidity: 33 % Increased 3% since last hour.
Humidex: 98.7°F
Dewpoint: 58.6°F Increased 3.3°F since last hour.
Wetbulb: 71.1°F
Waxing Crescent
Waxing Crescent, Moon at 4 days in cycle
22%
Illuminated
UV Forecast Current Solar Energy
16-Aug-2026   Very High   9.6   
17-Aug-2026   Very High   9.0   
18-Aug-2026   Very High   9.4   
Energy: 0 W/m2 (0%)
High: 815 at  1:31pm
Apparent Temp: 92.9°F
Heat Index Cooling Degree Days Sun
Current: 91.0°F
Today: 108.5°F  3:18pm
Yesterday: 113.8°F
Last Week: 114.7°F
Record: 127.2°F   26-Aug-2023
Today: 21.4
August: 384.3
2026 to Date: 2277.6
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:20 hrs:min
-00:01:48 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:51am
Sunset: 8:11pm
Moonrise: 11:56am
Moonset: 10:18pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.33 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.35 in   
7-Day: -2.35 in 2.35 in water in deficit of what evaporated in last 7 days.
August: -4.73 in 4.73 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.15 kg/m3
Cloud Height: 8354 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: MODERATE
Currently:
54.2 at 9:50 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  -   Tonight's and Monday's Outlook
Tonight

Tonight: Clear
Clear

Lo 80 °F
NWS forecast: Clear. Low around 80, with temperatures rising to around 82 overnight. Heat index values as high as 98. South wind 5 to 10 mph.
Monday

Monday: Sunny
Sunny

Hi 103 °F
NWS forecast: Sunny, with a high near 103. Heat index values as high as 105. West southwest wind 5 to 10 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: Mostly Clear
Mostly Clear
Hi 103 °F Lo 81 °F Hi 103 °F Lo 82 °F Hi 102 °F Lo 81 °F Hi 103 °F Lo 80 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.