Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 18-Jun-2026 11:50am - next update at 11:55am  
Summary / Temperature Wind Precipitation Outlook


Partly cloudy, Dry
Partly cloudy, Dry

89.3°F Warmer 0.5°F than last hour.
Warm
Currently 89.3, Max: 89.4, Min: 75.9 Feels like:
104°F

24-hr
difference
2.3°FWarmer 2.3°F than yesterday at this time.
TEMP HIGH LOW
Today 89.4°F
11:28am
75.9°F
6:22am
Yesterday 93.7°F
4:04pm
74.8°F
6:03am
Record 104°F
2011
56°F
1912
Normal 92°F
73°F
 Wind from S S
8.5
Gust:
5.5
Gentle Breeze

60-Min Avg: 4.6 mph
120-Min Avg: 3.5 mph
Max Gust: 20.9 mph 2:10am
Month: 36.3 mph Jun 7
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
6/14/2026
8:24 PM
June: 2.38 in
Last 7 Days: 0.44 in
Rain Season:1 17.78 in
Rain Days: 49 in 2026
3 days since last rain
Tonight

Tonight: Showers and thunderstorms likely after 1am.  Mostly cloudy, with a low around 78. Southeast wind 5 to 10 mph becoming north northeast after midnight.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Partly Cloudy
then T-storms
Likely

Barometer Humidity/Dew Point Moon
Current: 29.671 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Rising slowly
High: 29.671  |  Low: 29.588
Humidity: 71 % Increased 3% since last hour.
Humidex: 113.4°F
Dewpoint: 78.7°F Increased 1.9°F since last hour.
Wetbulb: 81.6°F
Waxing Crescent
Waxing Crescent, Moon at 4 days in cycle
18%
Illuminated
Current UV Index Current Solar Energy
   4.7    Medium 
High: 5.4 @ 11:45am
Time to Burn: 24 Mins
Energy: 0 W/m2 (74%)
High: 872 at  11:46am
Apparent Temp: 111.1°F
Heat Index Cooling Degree Days Sun
Current: 103.8°F
Today: 104.8°F  11:49am
Yesterday: 107.0°F
Last Week: 107.8°F
Record: 127.2°F   26-Aug-2023
Today: 6.7
June: 287.0
2026 to Date: 943.6
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
14:20 hrs:min
+ 00:00:10 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:18am
Sunset: 8:38pm
Moonrise: 10:08am
Moonset: 11:22pm
Full Moon: June 29 2026
New Moon: 09:44 UTC July 14 2026
Updated at Midnight
Current: 0.20 in   
7-Days Rain: 0.44 in   
7-Days ET: 1.38 in   
7-Day: -0.94 in 0.94 in water in deficit of what evaporated in last 7 days.
June: -1.2 in 1.2 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.13 kg/m3
Cloud Height: 3191 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:19 ISS:Ok CON:4.6 RCP:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
4.9 at 11:50 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: Mostly sunny, with a high near 96. Heat index values as high as 107. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Sunny


Hi 96 °F
NWS forecast: Mostly sunny, with a high near 96. Heat index values as high as 107. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight

Tonight: Showers and thunderstorms likely after 1am.  Mostly cloudy, with a low around 78. Southeast wind 5 to 10 mph becoming north northeast after midnight.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Partly Cloudy
then T-storms
Likely

Lo 78 °F
NWS forecast: Showers and thunderstorms likely after 1am. Mostly cloudy, with a low around 78. Southeast wind 5 to 10 mph becoming north northeast after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Showers and thunderstorms likely after 1am.  Mostly cloudy, with a low around 78. Southeast wind 5 to 10 mph becoming north northeast after midnight.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Partly Cloudy
then T-storms
Likely
Juneteenth

Juneteenth: Showers and thunderstorms likely, mainly before 10am.  Mostly cloudy, with a high near 90. East wind around 10 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely
Friday
Night
Friday Night: Showers and thunderstorms likely.  Mostly cloudy, with a low around 75. Southeast wind 5 to 10 mph.  Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
T-storms
Likely
Saturday

Saturday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 91. South wind around 10 mph.
Chance
T-storms
Saturday
Night
Saturday Night: Partly cloudy, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Partly Cloudy

Sunday

Sunday: Mostly sunny, with a high near 97. South southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Mostly Sunny

Sunday
Night
Sunday Night: A 30 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 77. South wind 15 to 20 mph, with gusts as high as 30 mph.
Clear then
Chance
T-storms
Monday

Monday: A 30 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 91. South wind 10 to 15 mph.
Chance
T-storms
Lo 78 °F Hi 90 °F Lo 75 °F Hi 91 °F Lo 77 °F Hi 97 °F Lo 77 °F Hi 91 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.