Heat Advisory HEAT ADVISORY - Plano, Collin County, Texas
Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 27-Aug-2026 12:10am - next update at 12:15am  
Summary / Temperature Wind Precipitation Outlook


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

84.9°F Colder 2.1°F than last hour.
Warm
Currently 84.9, Max: 85.3, Min: 84.8 Feels like:
89°F

24-hr
difference
-6.4°FColder 6.4°F than yesterday at this time.
TEMP HIGH LOW
Today 85.3°F
12:00am
84.8°F
12:08am
Yesterday 101.7°F
4:44pm
83.1°F
7:10am
Record 107°F
1901
61°F
1906
Normal 94°F
74°F
 Calm NNE
0.0
Gust:
0.0
Calm

60-Min Avg: Calm
120-Min Avg: Calm
Max Gust: 0.0 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
23 days since last rain
Thursday

Thursday: Mostly Sunny
Mostly Sunny

Barometer Humidity/Dew Point Moon
Current: 29.892 inHg  
1-Hr Trend: Steady
3-Hr Trend: Rising
High: 29.898  |  Low: 29.892
Humidity: 61 % Increased 6% since last hour.
Humidex: 100.2°F
Dewpoint: 69.9°F Increased 1°F since last hour.
Wetbulb: 74.8°F
Full Moon
Full Moon, Moon at 13 days in cycle
99%
Illuminated
UV Forecast Current Solar Energy
27-Aug-2026   Very High   9.3   
28-Aug-2026   Very High   9.3   
29-Aug-2026   Very High   9.2   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 91.2°F
Heat Index Cooling Degree Days Sun
Current: 89.3°F
Today: 89.8°F  12:00am
Yesterday: 110.7°F
Last Week: 116.0°F
Record: 127.2°F   26-Aug-2023
Today: 23.8
August: 672.3
2026 to Date: 2566.3
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:01 hrs:min
-00:01:54 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:58am
Sunset: 7:59pm
Moonrise: 7:24pm
Moonset: 6:22am
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.03 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.87 in   
7-Day: -1.87 in 1.87 in water in deficit of what evaporated in last 7 days.
August: -7.77 in 7.77 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.15 kg/m3
Cloud Height: 4177 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:97%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
10.3 at 00:10 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: Slight Chance Rain Showers
Slight Chance Rain Showers

Lo 79 °F
NWS forecast: A slight chance of rain showers before 4am. Mostly clear, with a low around 79. North northeast wind around 5 mph. Chance of precipitation is 20%.
Thursday

Thursday: Mostly Sunny
Mostly Sunny

Hi 100 °F
NWS forecast: Mostly sunny. High near 100, with temperatures falling to around 98 in the afternoon. Heat index values as high as 109. Northeast wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
 NWS NWS Short Term Weather Forecast
Thursday

Thursday: Mostly Sunny
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: Mostly Clear
Mostly Clear
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Clear
Clear
Hi 100 °F Lo 77 °F Hi 98 °F Lo 78 °F Hi 100 °F Lo 79 °F Hi 99 °F Lo 79 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.