Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
spacer
Updated: @ 24-Jul-2026 12:45pm - next update at 12:50pm  
Summary / Temperature Wind Precipitation Outlook


Mostly cloudy, Dry
Mostly cloudy, Dry

88.6°F Warmer 5.1°F than last hour.
Warm
Currently 88.6, Max: 88.6, Min: 78.5 Feels like:
99°F

24-hr
difference
-1.9°FColder 1.9°F than yesterday at this time.
TEMP HIGH LOW
Today 88.6°F
12:44pm
78.5°F
7:00am
Yesterday 96.0°F
4:01pm
77.5°F
7:05am
Record 108°F
1977
64°F
1911
Normal 97°F
77°F
 Wind from S S
3.7
Gust:
2.2
Light Breeze

60-Min Avg: 2.3 mph
120-Min Avg: 3.5 mph
Max Gust: 17.6 mph 3:31am
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: 0.02 in
Rain Season:1 22.53 in
Rain Days: 57 in 2026
5 days since last rain
Tonight

Tonight: Partly Cloudy
Partly Cloudy

Barometer Humidity/Dew Point Moon
Current: 29.981 inHg Falling 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 29.998  |  Low: 29.902
Humidity: 68 % Decreased 10% since last hour.
Humidex: 110.5°F
Dewpoint: 76.7°F Increased 0.7°F since last hour.
Wetbulb: 80.1°F
Waxing Gibbous
Waxing Gibbous, Moon at 10 days in cycle
80%
Illuminated
Current UV Index Current Solar Energy
   6.0    High 
High: 6.0 @ 12:44pm
Time to Burn: 19 Mins
Energy: 0 W/m2 (63%)
High: 758 at  12:44pm
Apparent Temp: 110.5°F
Heat Index Cooling Degree Days Sun
Current: 99.2°F
Today: 100.7°F  12:44pm
Yesterday: 111.1°F
Last Week: 126.0°F
Record: 127.2°F   26-Aug-2023
Today: 9.1
July: 506.1
2026 to Date: 1701.2
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:57 hrs:min
-00:01:16 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:35am
Sunset: 8:32pm
Moonrise: 5:08pm
Moonset: 2:03am
Full Moon: July 29 2026
New Moon: 17:37 UTC August 12 2026
Updated at Midnight
Current: 0.10 in   
7-Days Rain: 0.02 in   
7-Days ET: 1.95 in   
7-Day: -1.93 in 1.93 in water in deficit of what evaporated in last 7 days.
July: -4.64 in 4.64 in water in deficit of what evaporated this month.
Irrigation System: Ready
Other Conditions
Air Density: 1.15 kg/m3
Cloud Height: 3483 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:18 ISS:Ok CON:4.6 RCP:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
6.3 at 12:45 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  -   Today's and Tonight's Outlook
Today

Today: Slight Chance Rain Showers
Slight Chance Rain Showers

Hi 98 °F
NWS forecast: A slight chance of rain showers before 4pm. Partly sunny, with a high near 98. Heat index values as high as 106. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight

Tonight: Partly Cloudy
Partly Cloudy

Lo 81 °F
NWS forecast: Partly cloudy. Low around 81, with temperatures rising to around 83 overnight. Heat index values as high as 106. South wind 10 to 15 mph.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Saturday

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

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Clear
Clear
Monday

Monday: Sunny
Sunny
Monday
Night
Monday Night: Clear
Clear
Tuesday

Tuesday: Sunny
Sunny
Lo 81 °F Hi 100 °F Lo 82 °F Hi 101 °F Lo 83 °F Hi 102 °F Lo 83 °F Hi 103 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.