Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 22-Aug-2026 3:20pm - next update at 3:25pm  
Summary / Temperature Wind Precipitation Outlook


Mostly cloudy, Dry
Mostly cloudy, Dry

98.7°F Colder 0.7°F than last hour.
Dangerously Hot
Currently 98.7, Max: 103.0, Min: 80.3 Feels like:
107°F

24-hr
difference
2.5°FWarmer 2.5°F than yesterday at this time.
TEMP HIGH LOW
Today 103.0°F
12:47pm
80.3°F
6:45am
Yesterday 100.3°F
4:41pm
82.2°F
7:07am
Record 105°F
2010
61°F
1956
Normal 95°F
75°F
 Wind from SE SE
5.1
Gust:
5.5
Light Breeze

60-Min Avg: 8.1 mph
120-Min Avg: 3.5 mph
Max Gust: 14.3 mph 12:04pm
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
18 days since last rain
Tonight

Tonight: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms

Barometer Humidity/Dew Point Moon
Current: 29.942 inHg Falling 0.03 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling
High: 30.024  |  Low: 29.924
Humidity: 41 % Increased 1% since last hour.
Humidex: 114.9°F
Dewpoint: 70.9°F Decreased 0.1°F since last hour.
Wetbulb: 79.5°F
Waxing Gibbous
Waxing Gibbous, Moon at 9 days in cycle
75%
Illuminated
Current UV Index Current Solar Energy
   2.1    Low 
High: 5.2 @ 12:41pm
Time to Burn: 53 Mins
Energy: 0 W/m2 (33%)
High: 918 at  12:41pm
Apparent Temp: 112.5°F
Heat Index Cooling Degree Days Sun
Current: 107.3°F
Today: 116.1°F  12:43pm
Yesterday: 109.1°F
Last Week: 114.9°F
Record: 127.2°F   26-Aug-2023
Today: 13.6
August: 544.7
2026 to Date: 2438.4
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:11 hrs:min
-00:01:51 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:54am
Sunset: 8:05pm
Moonrise: 4:47pm
Moonset: 1:28am
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.23 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.06 in   
7-Day: -2.06 in 2.06 in water in deficit of what evaporated in last 7 days.
August: -6.44 in 6.44 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 7115 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:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
36.9 at 3:20 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 104 °F
NWS forecast: Mostly sunny, with a high near 104. Heat index values as high as 106. South southwest wind around 5 mph.
Tonight

Tonight: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms

Lo 83 °F
NWS forecast: A slight chance of showers and thunderstorms between 7pm and 4am. Partly cloudy, with a low around 83. Heat index values as high as 104. South wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday

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

Monday: Mostly Sunny
Mostly Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Sunny
Sunny
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Wednesday

Wednesday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Slight Chance Showers And T-Storms
Lo 83 °F Hi 106 °F Lo 85 °F Hi 107 °F Lo 84 °F Hi 107 °F Lo 83 °F Hi 104 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.