Extreme Heat Warning EXTREME HEAT WARNING - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 21-Aug-2026 11:10am - next update at 11:15am  
Summary / Temperature Wind Precipitation Outlook


Partly cloudy, Dry
Partly cloudy, Dry

94.5°F Warmer 3.3°F than last hour.
Hot
Currently 94.5, Max: 94.5, Min: 82.2 Feels like:
105°F

24-hr
difference
0°F 
TEMP HIGH LOW
Today 94.5°F
11:08am
82.2°F
7:07am
Yesterday 105.8°F
3:08pm
82.2°F
7:10am
Record 106°F
2023
62°F
1940
Normal 95°F
75°F
 Wind from N N
5.5
Gust:
4.4
Light Breeze

60-Min Avg: 3.5 mph
120-Min Avg: 2.3 mph
Max Gust: 12.7 mph 12:24am
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
17 days since last rain
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy

Barometer Humidity/Dew Point Moon
Current: 30.028 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Rising
High: 30.031  |  Low: 29.923
Humidity: 52 % Decreased 5% since last hour.
Humidex: 113.8°F
Dewpoint: 74.2°F Increased 0.5°F since last hour.
Wetbulb: 80.2°F
Waxing Gibbous
Waxing Gibbous, Moon at 8 days in cycle
65%
Illuminated
Current UV Index Current Solar Energy
   2.6    Low 
High: 2.9 @ 10:43am
Time to Burn: 43 Mins
Energy: 0 W/m2 (65%)
High: 672 at  10:44am
Apparent Temp: 112.1°F
Heat Index Cooling Degree Days Sun
Current: 105.3°F
Today: 106.4°F  11:06am
Yesterday: 115.0°F
Last Week: 114.9°F
Record: 127.2°F   26-Aug-2023
Today: 10.8
August: 515.8
2026 to Date: 2409.5
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:12 hrs:min
-00:01:50 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:54am
Sunset: 8:06pm
Moonrise: 3:55pm
Moonset: 12:40am
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.13 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.22 in   
7-Day: -2.22 in 2.22 in water in deficit of what evaporated in last 7 days.
August: -6.22 in 6.22 in water in deficit of what evaporated this month.
Irrigation System: Ready
Other Conditions
Air Density: 1.14 kg/m3
Cloud Height: 5412 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:
19.6 at 11:10 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  -   Today's and Tonight's Outlook
Today

Today: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms

Hi 105 °F
NWS forecast: A slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 105. Heat index values as high as 107. Southwest wind around 5 mph.
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy

Lo 82 °F
NWS forecast: A slight chance of showers and thunderstorms before 10pm. Partly cloudy. Low around 82, with temperatures rising to around 84 overnight. Heat index values as high as 105. South wind 5 to 10 mph. Chance of precipitation is 20%.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Saturday

Saturday: Mostly Sunny
Mostly Sunny
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
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
Lo 82 °F Hi 105 °F Lo 81 °F Hi 105 °F Lo 82 °F Hi 104 °F Lo 83 °F Hi 105 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.