Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 26-Aug-2026 5:35am - next update at 5:40am  
Summary / Temperature Wind Precipitation Outlook


Night time, Dry, Overcast
Night time, Dry, Overcast

85.2°F Colder 0.7°F than last hour.
Warm
Currently 85.2, Max: 91.5, Min: 85.1 Feels like:
87°F

24-hr
difference
-0.3°FColder 0.3°F than yesterday at this time.
TEMP HIGH LOW
Today 91.5°F
12:00am
85.1°F
5:11am
Yesterday 101.7°F
4:23pm
82.3°F
9:06am
Record 110°F
2023
60°F
1926
Normal 94°F
75°F
 Wind from SSW SSW
5.2
Gust:
5.5
Light Breeze

60-Min Avg: 4.6 mph
120-Min Avg: 2.3 mph
Max Gust: 15.4 mph 5:19am
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
22 days since last rain
Wednesday

Wednesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms

Barometer Humidity/Dew Point Moon
Current: 29.889 inHg Falling 0.02 °F/hr
1-Hr Trend: Falling slowly
3-Hr Trend: Steady
High: 29.914  |  Low: 29.883
Humidity: 52 %  
Humidex: 96.9°F
Dewpoint: 65.6°F Decreased 0.7°F since last hour.
Wetbulb: 72.4°F
Waxing Gibbous
Waxing Gibbous, Moon at 13 days in cycle
97%
Illuminated
UV Forecast Current Solar Energy
26-Aug-2026   Very High   9.4   
27-Aug-2026   Very High   8.9   
28-Aug-2026   Very High   9.6   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 87.5°F
Heat Index Cooling Degree Days Sun
Current: 87.3°F
Today: 93.0°F  12:06am
Yesterday: 108.9°F
Last Week: 116.0°F
Record: 127.2°F   26-Aug-2023
Today: 5.6
August: 651.8
2026 to Date: 2545.7
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:03 hrs:min
-00:01:54 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:57am
Sunset: 8:00pm
Moonrise: 6:52pm
Moonset: 5:22am
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.11 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.98 in   
7-Day: -1.98 in 1.98 in water in deficit of what evaporated in last 7 days.
August: -7.59 in 7.59 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.16 kg/m3
Cloud Height: 5244 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:13 ISS:Ok CON:4.6 RCP:99%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
18.5 at 05:35 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 Wednesday's Outlook
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 83 °F
NWS forecast: Mostly clear, with a low around 83. South southwest wind around 10 mph.
Wednesday

Wednesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms

Hi 102 °F
NWS forecast: A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 102. Heat index values as high as 104. West wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
 NWS NWS Short Term Weather Forecast
Wednesday

Wednesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Thursday

Thursday: Slight Chance Showers And Thunderstorms then Mostly Sunny
Slight Chance Showers And T-Storms then Mostly Sunny
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday

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

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Clear
Clear
Hi 102 °F Lo 79 °F Hi 99 °F Lo 77 °F Hi 98 °F Lo 77 °F Hi 99 °F Lo 78 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.