Flood Advisory FLOOD ADVISORY - Plano, Collin County, Texas
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Updated: @ 20-Sep-2026 9:30pm - next update at 9:35pm  
Summary / Temperature Wind Precipitation Outlook


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

77.0°F Colder 2.7°F than last hour.
Comfortable
Currently 77.0, Max: 97.9, Min: 76.8 Feels like:
79°F

24-hr
difference
-10.9°FColder 10.9°F than yesterday at this time.
TEMP HIGH LOW
Today 97.9°F
2:22pm
76.8°F
9:22pm
Yesterday 96.9°F
4:07pm
75.9°F
7:22am
Record 102°F
1953
46°F
1971
Normal 87°F
67°F
 Wind from ENE ENE
5.2
Gust:
6.6
Light Breeze

60-Min Avg: 5.8 mph
120-Min Avg: 5.8 mph
Max Gust: 27.6 mph 8:04pm
Month: 27.5 mph Sep 20
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
7/19/2026
7:44 PM
September: 0.00 in
Last 7 Days: 0.00 in
Rain Season:1 22.54 in
Rain Days: 57 in 2026
63 days since last rain
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Barometer Humidity/Dew Point Moon
Current: 29.892 inHg Rising 0.03 °F/hr
1-Hr Trend: Rising slowly
3-Hr Trend: Rising rapidly
High: 29.908  |  Low: 29.767
Humidity: 74 % Increased 5% since last hour.
Humidex: 90.7°F
Dewpoint: 68.1°F Decreased 0.5°F since last hour.
Wetbulb: 71.1°F
Waxing Gibbous
Waxing Gibbous, Moon at 9 days in cycle
71%
Illuminated
UV Forecast Current Solar Energy
21-Sep-2026   Very High   8.2   
22-Sep-2026   High   7.9   
23-Sep-2026   High   7.9   
Energy: 0 W/m2 (0%)
High: 833 at  12:27pm
Apparent Temp: 79.7°F
Heat Index Cooling Degree Days Sun
Current: 78.6°F
Today: 108.1°F  2:22pm
Yesterday: 101.3°F
Last Week: 110.8°F
Record: 127.2°F   26-Aug-2023
Today: 16.3
September: 463.5
2026 to Date: 3155.6
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
12:12 hrs:min
-00:02:01 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:14am
Sunset: 7:26pm
Moonrise: 4:49pm
Moonset: 2:06am
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.25 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: -4.62 in 4.62 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.17 kg/m3
Cloud Height: 2798 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:
3.0 at 9:30 PM
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 Monday's Outlook
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Lo 75 °F
NWS forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. East southeast wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Hi 91 °F
NWS forecast: A chance of showers and thunderstorms. Mostly sunny. High near 91, with temperatures falling to around 88 in the afternoon. West wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
 NWS NWS Short Term Weather Forecast
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday
Night
Monday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Wednesday
Night
Wednesday Night: Mostly Cloudy
Mostly Cloudy
Thursday

Thursday: Partly Sunny
Partly Sunny
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Hi 91 °F Lo 74 °F Hi 93 °F Lo 73 °F Hi 93 °F Lo 72 °F Hi 92 °F Lo 71 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.