Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 26-Aug-2026 6:00pm - next update at 6:05pm  
Summary / Temperature Wind Precipitation Outlook


Overcast, Dry
Overcast, Dry

98.6°F Colder 1.4°F than last hour.
Dangerously Hot
Currently 98.6, Max: 101.7, Min: 83.1 Feels like:
104°F

24-hr
difference
-0.6°FColder 0.6°F than yesterday at this time.
TEMP HIGH LOW
Today 101.7°F
4:44pm
83.1°F
7:10am
Yesterday 101.7°F
4:23pm
82.3°F
9:06am
Record 110°F
2023
60°F
1926
Normal 94°F
75°F
 Wind from NE NE
0.3
Gust:
0.0
Calm

60-Min Avg: 2.3 mph
120-Min Avg: 1.2 mph
Max Gust: 15.4 mph 5:19am
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
22 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: 29.825 inHg Falling 0.03 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling
High: 29.927  |  Low: 29.822
Humidity: 37 %  
Humidex: 112.1°F
Dewpoint: 67.8°F Decreased 1.2°F since last hour.
Wetbulb: 77.8°F
Waxing Gibbous
Waxing Gibbous, Moon at 13 days in cycle
98%
Illuminated
Current UV Index Current Solar Energy
   0.0   None
High: 3.8 @ 11:26am
Time to Burn: 720 Mins
Energy: 0 W/m2 (8%)
High: 872 at  3:43pm
Apparent Temp: 110.2°F
Heat Index Cooling Degree Days Sun
Current: 103.8°F
Today: 110.7°F  3:50pm
Yesterday: 108.9°F
Last Week: 116.0°F
Record: 127.2°F   26-Aug-2023
Today: 17.2
August: 663.4
2026 to Date: 2557.3
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:03 hrs:min
-00:01:54 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:57am
Sunset: 8:00pm
Moonrise: 6:52pm
Moonset: 5:22am
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: 1.98 in   
7-Day: -1.98 in 1.98 in water in deficit of what evaporated in last 7 days.
August: -7.59 in 7.59 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.12 kg/m3
Cloud Height: 7800 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:
45.4 at 6:00 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: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms

Hi 99 °F
NWS forecast: A slight chance of rain showers before 4pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 99. Heat index values as high as 106. West northwest wind 0 to 5 mph. Chance of precipitation is 20%.
Tonight

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

Lo 79 °F
NWS forecast: A slight chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 79. Heat index values as high as 104. North northeast wind around 5 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
Thursday

Thursday: Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Thursday
Night
Thursday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
Friday

Friday: Slight Chance Rain Showers then Sunny
Slight Chance Rain Showers then 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
Lo 79 °F Hi 100 °F Lo 77 °F Hi 98 °F Lo 78 °F Hi 100 °F Lo 79 °F Hi 99 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.