Flood Watch FLOOD WATCH - Plano, Collin County, Texas
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Updated: @ 29-Sep-2026 3:30am - next update at 3:35am  
Summary / Temperature Wind Precipitation Outlook


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

78.5°F Colder 0.8°F than last hour.
Comfortable
Currently 78.5, Max: 80.8, Min: 78.4 Feels like:
80°F

24-hr
difference
0.7°FWarmer 0.7°F than yesterday at this time.
TEMP HIGH LOW
Today 80.8°F
12:00am
78.4°F
3:29am
Yesterday 91.2°F
3:39pm
73.0°F
8:36am
Record 101°F
2011
46°F
1967
Normal 85°F
64°F
 Wind from S S
1.5
Gust:
1.1
Light Air

60-Min Avg: 5.8 mph
120-Min Avg: 4.6 mph
Max Gust: 13.2 mph 1:56am
Month: 27.5 mph Sep 20
Today: 0.00 in
Yesterday: 0.02 in
Last
Rain:
9/28/2026
10:44 AM
September: 0.02 in
Last 7 Days: 0.02 in
Rain Season:1 22.56 in
Rain Days: 58 in 2026
1 rain day in September
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny

Barometer Humidity/Dew Point Moon
Current: 29.859 inHg  
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 29.872  |  Low: 29.854
Humidity: 66 % Increased 2% since last hour.
Humidex: 90.7°F
Dewpoint: 66.2°F Increased 0.2°F since last hour.
Wetbulb: 70.5°F
Waning Gibbous
Waning Gibbous, Moon at 17 days in cycle
91%
Illuminated
UV Forecast Current Solar Energy
29-Sep-2026   High   7.6   
30-Sep-2026   High   7.6   
01-Oct-2026   High   7.4   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 82.6°F
Heat Index Cooling Degree Days Sun
Current: 80.5°F
Today: 83.4°F  12:00am
Yesterday: 98.8°F
Last Week: 106.0°F
Record: 127.2°F   26-Aug-2023
Today: 1.9
September: 613.5
2026 to Date: 3306.2
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
11:56 hrs:min
-00:02:02 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:19am
Sunset: 7:15pm
Moonrise: 8:21pm
Moonset: 10:31am
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.07 in   
7-Days Rain: 0.02 in   
7-Days ET: 1.43 in   
7-Day: -1.41 in 1.41 in water in deficit of what evaporated in last 7 days.
September: -6.47 in 6.47 in water in deficit of what evaporated this month.
Irrigation System: Ready
Other Conditions
Air Density: 1.17 kg/m3
Cloud Height: 3572 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:
6.6 at 03:30 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 Tuesday's Outlook
Overnight

Overnight: Partly Cloudy
Partly Cloudy

Lo 74 °F
NWS forecast: Partly cloudy. Low around 74, with temperatures rising to around 76 overnight. South southeast wind 5 to 10 mph.
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny

Hi 93 °F
NWS forecast: Mostly sunny, with a high near 93. Heat index values as high as 97. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
 NWS NWS Short Term Weather Forecast
Tuesday

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

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

Thursday: Showers And Thunderstorms
Showers And T-Storms
Thursday
Night
Thursday Night: Showers And Thunderstorms
Showers And T-Storms
Friday

Friday: Showers And Thunderstorms
Showers And T-Storms
Friday
Night
Friday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Hi 93 °F Lo 75 °F Hi 93 °F Lo 73 °F Hi 79 °F Lo 68 °F Hi 79 °F Lo 66 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.