Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 27-Jul-2026 3:50pm - next update at 3:55pm  
Summary / Temperature Wind Precipitation Outlook


Mostly sunny, Dry
Mostly sunny, Dry

100.7°F Warmer 1.7°F than last hour.
Dangerously Hot
Currently 100.7, Max: 100.8, Min: 81.1 Feels like:
110°F

24-hr
difference
0.9°FWarmer 0.9°F than yesterday at this time.
TEMP HIGH LOW
Today 100.8°F
3:49pm
81.1°F
6:41am
Yesterday 100.1°F
3:21pm
80.5°F
7:01am
Record 106°F
1944
68°F
1994
Normal 97°F
77°F
 Wind from SSW SSW
5.9
Gust:
7.7
Light Breeze

60-Min Avg: 3.5 mph
120-Min Avg: 5.8 mph
Max Gust: 18.7 mph 2:40pm
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
8 days since last rain
Tonight

Tonight: Mostly Clear
Mostly Clear

Barometer Humidity/Dew Point Moon
Current: 29.833 inHg Falling 0.02 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Falling
High: 29.928  |  Low: 29.829
Humidity: 38 %  
Humidex: 116.5°F
Dewpoint: 70.5°F Increased 1.4°F since last hour.
Wetbulb: 79.8°F
Waxing Gibbous
Waxing Gibbous, Moon at 13 days in cycle
97%
Illuminated
Current UV Index Current Solar Energy
   3.9    Medium 
High: 5.9 @ 1:21pm
Time to Burn: 29 Mins
Energy: 0 W/m2 (70%)
High: 848 at  1:23pm
Apparent Temp: 119.1°F
Heat Index Cooling Degree Days Sun
Current: 109.8°F
Today: 112.1°F  2:34pm
Yesterday: 110.1°F
Last Week: 126.0°F
Record: 127.2°F   26-Aug-2023
Today: 12.8
July: 580.7
2026 to Date: 1776.0
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:53 hrs:min
-00:01:22 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:37am
Sunset: 8:30pm
Moonrise: 6:53pm
Moonset: 4:33am
Full Moon: July 29 2026
New Moon: 17:37 UTC August 12 2026
Updated at Midnight
Current: 0.36 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.00 in   
7-Day: -2 in 2 in water in deficit of what evaporated in last 7 days.
July: -5.45 in 5.45 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.12 kg/m3
Cloud Height: 7678 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:
43.5 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: Sunny
Sunny

Hi 102 °F
NWS forecast: Sunny, with a high near 102. Heat index values as high as 109. South southwest wind around 10 mph.
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 82 °F
NWS forecast: Mostly clear. Low around 82, with temperatures rising to around 84 overnight. Heat index values as high as 107. South wind 5 to 10 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Sunny
Sunny
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday

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

Friday: Mostly Sunny
Mostly Sunny
Lo 82 °F Hi 102 °F Lo 82 °F Hi 101 °F Lo 83 °F Hi 101 °F Lo 82 °F Hi 102 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.