Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 29-Jul-2026 3:50pm - next update at 3:55pm  
Summary / Temperature Wind Precipitation Outlook


Mostly sunny, Dry
Mostly sunny, Dry

98.8°F Warmer 1.9°F than last hour.
Dangerously Hot
Currently 98.8, Max: 98.9, Min: 81.2 Feels like:
109°F

24-hr
difference
-1.7°FColder 1.7°F than yesterday at this time.
TEMP HIGH LOW
Today 98.9°F
3:47pm
81.2°F
6:42am
Yesterday 101.1°F
3:38pm
80.0°F
6:53am
Record 109°F
1912
67°F
1984
Normal 97°F
77°F
 Wind from S S
2.3
Gust:
2.2
Light Air

60-Min Avg: 8.1 mph
120-Min Avg: 6.9 mph
Max Gust: 15.4 mph 1:11am
Month: 42.9 mph Jul 15
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
7/19/2026
7:45 PM
July: 1.48 in
Last 7 Days: 0.00 in
Rain Season:1 22.53 in
Rain Days: 57 in 2026
10 days since last rain
Tonight

Tonight: Partly Cloudy
Partly Cloudy

Barometer Humidity/Dew Point Moon
Current: 29.817 inHg Falling 0.02 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling
High: 29.879  |  Low: 29.799
Humidity: 42 % Decreased 4% since last hour.
Humidex: 115.7°F
Dewpoint: 71.7°F Decreased 0.9°F since last hour.
Wetbulb: 79.9°F
Full Moon
Full Moon, Moon at 15 days in cycle
100%
Illuminated
Current UV Index Current Solar Energy
   3.8    Medium 
High: 5.8 @ 1:55pm
Time to Burn: 29 Mins
Energy: 0 W/m2 (72%)
High: 937 at  1:55pm
Apparent Temp: 119.5°F
Heat Index Cooling Degree Days Sun
Current: 109.1°F
Today: 111.7°F  1:32pm
Yesterday: 111.7°F
Last Week: 126.0°F
Record: 127.2°F   26-Aug-2023
Today: 13.3
July: 632.1
2026 to Date: 1827.5
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:51 hrs:min
-00:01:25 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:38am
Sunset: 8:29pm
Moonrise: 8:18pm
Moonset: 6:32am
Full Moon: July 29 2026
New Moon: 17:37 UTC August 12 2026
Updated at Midnight
Current: 0.29 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.07 in   
7-Day: -2.07 in 2.07 in water in deficit of what evaporated in last 7 days.
July: -6.11 in 6.11 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.12 kg/m3
Cloud Height: 6955 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:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
35.0 at 3:50 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: Partly Sunny
Partly Sunny

Hi 100 °F
NWS forecast: Partly sunny, with a high near 100. Heat index values as high as 106. South southeast wind 5 to 10 mph.
Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 80 °F
NWS forecast: Partly cloudy. Low around 80, with temperatures rising to around 82 overnight. Heat index values as high as 103. South wind 5 to 10 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday

Sunday: Sunny
Sunny
Lo 80 °F Hi 100 °F Lo 81 °F Hi 103 °F Lo 81 °F Hi 97 °F Lo 75 °F Hi 95 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.