Air Quality Alert AIR QUALITY ALERT - Plano, Collin County, Texas
spacer
Updated: @ 18-Sep-2026 3:10am - next update at 3:15am  
Summary / Temperature Wind Precipitation Outlook


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

82.4°F Colder 0.4°F than last hour.
Warm
Currently 82.4, Max: 86.4, Min: 82.0 Feels like:
85°F

24-hr
difference
-1.5°FColder 1.5°F than yesterday at this time.
TEMP HIGH LOW
Today 86.4°F
12:00am
82.0°F
2:47am
Yesterday 99.8°F
3:32pm
80.3°F
7:09am
Record 100°F
1975
47°F
1981
Normal 88°F
68°F
 Wind from WSW WSW
0.6
Gust:
0.0
Calm

60-Min Avg: Calm
120-Min Avg: 2.3 mph
Max Gust: 8.1 mph 12:19am
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
45 days since last rain
Friday

Friday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 30.098 inHg  
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 30.107  |  Low: 30.090
Humidity: 61 % Increased 2% since last hour.
Humidex: 95.7°F
Dewpoint: 67.6°F Increased 0.6°F since last hour.
Wetbulb: 72.6°F
Waxing Crescent
Waxing Crescent, Moon at 6 days in cycle
45%
Illuminated
UV Forecast Current Solar Energy
18-Sep-2026   High   7.8   
19-Sep-2026   High   7.9   
20-Sep-2026   Very High   8.1   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 87.6°F
Heat Index Cooling Degree Days Sun
Current: 85.1°F
Today: 89.1°F  12:00am
Yesterday: 109.2°F
Last Week: 116.5°F
Record: 127.2°F   26-Aug-2023
Today: 2.5
September: 405.8
2026 to Date: 3097.8
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:18 hrs:min
-00:02:01 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:12am
Sunset: 7:30pm
Moonrise: 2:37pm
Moonset: 11:19pm
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.04 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: -4.18 in 4.18 in water in deficit of what evaporated this month.
Irrigation System: Ready
Other Conditions
Air Density: 1.17 kg/m3
Cloud Height: 4143 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:
10.1 at 03:10 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  -   Overnight's and Friday's Outlook
Overnight

Overnight: Partly Cloudy
Partly Cloudy

Lo 79 °F
NWS forecast: Partly cloudy. Low around 79, with temperatures rising to around 81 overnight. South wind around 5 mph.
Friday

Friday: Sunny
Sunny

Hi 99 °F
NWS forecast: Sunny. High near 99, with temperatures falling to around 97 in the afternoon. Heat index values as high as 101. South wind around 5 mph.
 NWS NWS Short Term Weather Forecast
Friday

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

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

Sunday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Hi 99 °F Lo 77 °F Hi 99 °F Lo 77 °F Hi 98 °F Lo 77 °F Hi 96 °F Lo 74 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.