Extreme Heat Warning EXTREME HEAT WARNING - Plano, Collin County, Texas
Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
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Updated: @ 18-Aug-2026 5:55am - next update at 6:00am  
Summary / Temperature Wind Precipitation Outlook


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

82.8°F Colder 1.2°F than last hour.
Warm
Currently 82.8, Max: 92.6, Min: 82.8 Feels like:
85°F

24-hr
difference
1.1°FWarmer 1.1°F than yesterday at this time.
TEMP HIGH LOW
Today 92.6°F
12:00am
82.8°F
5:52am
Yesterday 105.3°F
3:11pm
80.1°F
7:11am
Record 112°F
1909
65°F
1992
Normal 96°F
76°F
 Wind from SSW SSW
1.7
Gust:
2.2
Light Air

60-Min Avg: 2.3 mph
120-Min Avg: 2.3 mph
Max Gust: 13.2 mph 2:22am
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
14 days since last rain
Tuesday

Tuesday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.983 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Rising slowly
High: 29.986  |  Low: 29.949
Humidity: 55 % Increased 3% since last hour.
Humidex: 94.1°F
Dewpoint: 65.0°F Increased 0.4°F since last hour.
Wetbulb: 71.3°F
Waxing Crescent
Waxing Crescent, Moon at 5 days in cycle
34%
Illuminated
UV Forecast Current Solar Energy
18-Aug-2026   Very High   9.8   
19-Aug-2026   Very High   9.3   
20-Aug-2026   Very High   9.2   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 86.6°F
Heat Index Cooling Degree Days Sun
Current: 84.6°F
Today: 93.5°F  12:00am
Yesterday: 113.2°F
Last Week: 114.7°F
Record: 127.2°F   26-Aug-2023
Today: 5.8
August: 423.7
2026 to Date: 2317.2
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:18 hrs:min
-00:01:48 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:52am
Sunset: 8:10pm
Moonrise: 12:57pm
Moonset: 10:48pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.10 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.35 in   
7-Day: -2.35 in 2.35 in water in deficit of what evaporated in last 7 days.
August: -5.31 in 5.31 in water in deficit of what evaporated this month.
Irrigation System: Ready
Other Conditions
Air Density: 1.16 kg/m3
Cloud Height: 4834 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:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
15.1 at 05:55 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  -   Overnight's and Tuesday's Outlook
Overnight

Overnight: Clear
Clear

Lo 82 °F
NWS forecast: Clear. Low around 82, with temperatures rising to around 84 overnight. South southwest wind 5 to 10 mph.
Tuesday

Tuesday: Sunny
Sunny

Hi 106 °F
NWS forecast: Sunny, with a high near 106. Heat index values as high as 106. Southwest wind around 5 mph.
 NWS NWS Short Term Weather Forecast
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: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Hi 106 °F Lo 83 °F Hi 104 °F Lo 82 °F Hi 103 °F Lo 81 °F Hi 103 °F Lo 80 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.