Extreme Heat Warning EXTREME HEAT WARNING - Plano, Collin County, Texas
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Updated: @ 23-Aug-2026 9:10pm - next update at 9:15pm  
Summary / Temperature Wind Precipitation Outlook
Record High

Night time, Dry
Night time, Dry

97.8°F Colder 2.8°F than last hour.
Dangerously Hot
Currently 97.8, Max: 108.2, Min: 81.7 Feels like:
101°F

24-hr
difference
3.4°FWarmer 3.4°F than yesterday at this time.
TEMP HIGH LOW
Today 108.2°F
3:28pm
81.7°F
7:27am
Yesterday 103.0°F
12:47pm
80.3°F
6:45am
Record 107°F
2010
64°F
1961
Normal 95°F
75°F
 Wind from S S
3.0
Gust:
4.4
Light Air

60-Min Avg: 4.6 mph
120-Min Avg: 2.3 mph
Max Gust: 17.6 mph 1:23pm
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
19 days since last rain
Monday

Monday: Slight Chance Rain Showers
Slight Chance Rain Showers

Barometer Humidity/Dew Point Moon
Current: 29.841 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Rising slowly
High: 29.966  |  Low: 29.816
Humidity: 35 % Increased 3% since last hour.
Humidex: 109.5°F
Dewpoint: 65.5°F Increased 0.1°F since last hour.
Wetbulb: 76.3°F
Waxing Gibbous
Waxing Gibbous, Moon at 10 days in cycle
84%
Illuminated
UV Forecast Current Solar Energy
24-Aug-2026   Very High   9.5   
25-Aug-2026   Very High   9.3   
26-Aug-2026   Very High   10.1   
Energy: 0 W/m2 (0%)
High: 800 at  1:55pm
Apparent Temp: 101.7°F
Heat Index Cooling Degree Days Sun
Current: 101.4°F
Today: 116.2°F  3:26pm
Yesterday: 116.1°F
Last Week: 116.0°F
Record: 127.2°F   26-Aug-2023
Today: 21.1
August: 579.7
2026 to Date: 2473.5
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:07 hrs:min
-00:01:52 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:56am
Sunset: 8:03pm
Moonrise: 6:16pm
Moonset: 3:20am
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.31 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.94 in   
7-Day: -1.94 in 1.94 in water in deficit of what evaporated in last 7 days.
August: -6.66 in 6.66 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 8146 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:
50.1 at 9:10 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: Mostly Clear
Mostly Clear

Lo 84 °F
NWS forecast: Mostly clear. Low around 84, with temperatures rising to around 87 overnight. Heat index values as high as 109. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday

Monday: Slight Chance Rain Showers
Slight Chance Rain Showers

Hi 107 °F
NWS forecast: A slight chance of rain showers between 10am and 4pm. Mostly sunny, with a high near 107. Heat index values as high as 105. Southwest wind around 10 mph, with gusts as high as 20 mph.
 NWS NWS Short Term Weather Forecast
Monday

Monday: Slight Chance Rain Showers
Slight Chance Rain Showers
Monday
Night
Monday Night: Mostly Clear then Slight Chance Showers And Thunderstorms
Mostly Clear then Slight Chance Showers And T-Storms
Tuesday

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

Wednesday: Mostly Sunny
Mostly Sunny
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday

Thursday: Slight Chance Rain Showers
Slight Chance Rain Showers
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Hi 107 °F Lo 84 °F Hi 106 °F Lo 83 °F Hi 103 °F Lo 80 °F Hi 101 °F Lo 79 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.