Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
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Updated: @ 17-Sep-2026 1:50am - next update at 1:55am  
Summary / Temperature Wind Precipitation Outlook


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

85.1°F Colder 0.2°F than last hour.
Warm
Currently 85.1, Max: 87.0, Min: 85.1 Feels like:
90°F

24-hr
difference
-0.1°FColder 0.1°F than yesterday at this time.
TEMP HIGH LOW
Today 87.0°F
12:00am
85.1°F
12:53am
Yesterday 100.2°F
2:56pm
80.4°F
7:24am
Record 99°F
1997
44°F
1903
Normal 88°F
68°F
 Wind from SSE SSE
3.3
Gust:
2.2
Light Breeze

60-Min Avg: 1.2 mph
120-Min Avg: 3.5 mph
Max Gust: 6.9 mph 1:38am
Month: 26.5 mph Sep 11
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
8/4/2026
6:09 PM
September: 0.00 in
Last 7 Days: 0.00 in
Rain Season:1 22.54 in
Rain Days: 58 in 2026
44 days since last rain
Thursday

Thursday: Mostly Sunny
Mostly Sunny

Barometer Humidity/Dew Point Moon
Current: 30.143 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 30.145  |  Low: 30.129
Humidity: 61 % Increased 2% since last hour.
Humidex: 100.6°F
Dewpoint: 70.1°F Increased 0.8°F since last hour.
Wetbulb: 75.0°F
Waxing Crescent
Waxing Crescent, Moon at 5 days in cycle
35%
Illuminated
UV Forecast Current Solar Energy
17-Sep-2026   High   7.6   
18-Sep-2026   High   7.0   
19-Sep-2026   High   7.7   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 89.7°F
Heat Index Cooling Degree Days Sun
Current: 89.8°F
Today: 91.5°F  12:00am
Yesterday: 109.3°F
Last Week: 116.5°F
Record: 127.2°F   26-Aug-2023
Today: 1.3
September: 379.9
2026 to Date: 3071.8
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:20 hrs:min
-00:02:01 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:11am
Sunset: 7:31pm
Moonrise: 1:43pm
Moonset: 10:33pm
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.06 in   
7-Days Rain: 0.00 in   
7-Days ET: 1.78 in   
7-Day: -1.78 in 1.78 in water in deficit of what evaporated in last 7 days.
September: -3.95 in 3.95 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.16 kg/m3
Cloud Height: 4180 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:
10.3 at 01:50 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: Mostly Clear
Mostly Clear

Lo 80 °F
NWS forecast: Mostly clear. Low around 80, with temperatures rising to around 82 overnight. Heat index values as high as 101. South southeast wind 5 to 10 mph.
Thursday

Thursday: Mostly Sunny
Mostly Sunny

Hi 99 °F
NWS forecast: Mostly sunny. High near 99, with temperatures falling to around 97 in the afternoon. Heat index values as high as 104. South southeast wind around 5 mph.
 NWS NWS Short Term Weather Forecast
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly 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: Partly Cloudy then Slight Chance Rain Showers
Partly Cloudy then Slight Chance Rain Showers
Hi 99 °F Lo 78 °F Hi 99 °F Lo 77 °F Hi 99 °F Lo 77 °F Hi 99 °F Lo 77 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.