Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 13-Aug-2026 12:40am - next update at 12:45am  
Summary / Temperature Wind Precipitation Outlook


Night time, Dry, Clear skies
Night time, Dry, Clear skies

88.8°F Colder 2°F than last hour.
Warm
Currently 88.8, Max: 90.0, Min: 88.7 Feels like:
95°F

24-hr
difference
1.7°FWarmer 1.7°F than yesterday at this time.
TEMP HIGH LOW
Today 90.0°F
12:00am
88.7°F
12:39am
Yesterday 101.7°F
3:51pm
80.3°F
6:55am
Record 106°F
2023
56°F
1967
Normal 97°F
76°F
 Wind from SSE SSE
10.2
Gust:
15.4
Gentle Breeze

60-Min Avg: 6.9 mph
120-Min Avg: 8.1 mph
Max Gust: 20.9 mph 12:38am
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
9 days since last rain
Thursday

Thursday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.829 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Rising
High: 29.832  |  Low: 29.822
Humidity: 56 % Increased 6% since last hour.
Humidex: 105.1°F
Dewpoint: 71.1°F Increased 1.4°F since last hour.
Wetbulb: 76.7°F
New Moon
New Moon, Moon at 0 days in cycle
0%
Illuminated
UV Forecast Current Solar Energy
13-Aug-2026   Very High   9.5   
14-Aug-2026   Very High   9.7   
15-Aug-2026   Very High   9.2   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 90.2°F
Heat Index Cooling Degree Days Sun
Current: 95.0°F
Today: 95.5°F  12:28am
Yesterday: 115.0°F
Last Week: 114.7°F
Record: 127.2°F   26-Aug-2023
Today: 0.5
August: 285.4
2026 to Date: 2178.5
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:27 hrs:min
-00:01:44 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:48am
Sunset: 8:15pm
Moonrise: 7:41am
Moonset: 8:20pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.20 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.17 in   
7-Day: -2.17 in 2.17 in water in deficit of what evaporated in last 7 days.
August: -3.61 in 3.61 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.14 kg/m3
Cloud Height: 4811 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: LOW
Currently:
14.8 at 00:40 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  -   Tonight's and Thursday's Outlook
Tonight

Tonight: Clear
Clear

Lo 81 °F
NWS forecast: Clear. Low around 81, with temperatures rising to around 83 overnight. Heat index values as high as 97. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday

Thursday: Sunny
Sunny

Hi 102 °F
NWS forecast: Sunny, with a high near 102. Heat index values as high as 105. South southwest wind around 15 mph, with gusts as high as 25 mph.
 NWS NWS Short Term Weather Forecast
Thursday

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

Friday: Sunny
Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Saturday

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

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Clear
Clear
Hi 102 °F Lo 79 °F Hi 99 °F Lo 81 °F Hi 100 °F Lo 81 °F Hi 101 °F Lo 80 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.