Flood Watch FLOOD WATCH - Plano, Collin County, Texas
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Updated: @ 30-Sep-2026 4:55pm - next update at 5:00pm  
Summary / Temperature Wind Precipitation Outlook


Mostly cloudy, Stopped raining
Mostly cloudy, Stopped raining

78.8°F Warmer 0.6°F than last hour.
Comfortable
Currently 78.8, Max: 89.5, Min: 77.5 Feels like:
82°F

24-hr
difference
-15.4°FColder 15.4°F than yesterday at this time.
TEMP HIGH LOW
Today 89.5°F
1:31pm
77.5°F
4:00pm
Yesterday 95.2°F
3:41pm
73.4°F
7:31am
Record 98°F
1977
43°F
1984
Normal 84°F
63°F
 Wind from S S
3.8
Gust:
3.3
Light Breeze

60-Min Avg: 10.4 mph
120-Min Avg: 3.5 mph
Max Gust: 29.9 mph 9:43am
Month: 29.7 mph Sep 30
Today: 0.21 in
Rate (/hr): 0.016 in
Storm Rain: 0.18 in
Yesterday: 0.00 in
September: 0.23 in
Last 7 Days: 0.02 in
Rain Season:1 22.77 in
Rain Days: 58 in 2026
2 rain days in September
Tonight

Tonight: Scattered Showers And Thunderstorms then Showers And Thunderstorms
Scattered Showers And T-Storms then Showers And T-Storms

Barometer Humidity/Dew Point Moon
Current: 29.733 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Falling slowly
High: 29.829  |  Low: 29.717
Humidity: 87 % Increased 1% since last hour.
Humidex: 98.5°F
Dewpoint: 74.6°F Increased 0.9°F since last hour.
Wetbulb: 75.9°F
Waning Gibbous
Waning Gibbous, Moon at 19 days in cycle
79%
Illuminated
Current UV Index Current Solar Energy
   0.0   None
High: 4.5 @ 1:24pm
Time to Burn: 720 Mins
Energy: 0 W/m2 (19%)
High: 685 at  11:19am
Apparent Temp: 90.2°F
Heat Index Cooling Degree Days Sun
Current: 82.3°F
Today: 98.0°F  1:31pm
Yesterday: 100.3°F
Last Week: 103.7°F
Record: 127.2°F   26-Aug-2023
Today: 11.2
September: 642.3
2026 to Date: 3335.0
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
11:54 hrs:min
-00:02:01 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 7:20am
Sunset: 7:14pm
Moonrise: 9:01pm
Moonset: 11:40am
Full Moon: September 26 2026
New Moon: 15:51 UTC October 10 2026
Updated at Midnight
Current: 0.20 in   
7-Days Rain: 0.02 in   
7-Days ET: 1.46 in   
7-Day: -1.44 in 1.44 in water in deficit of what evaporated in last 7 days.
September: -6.51 in 6.51 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.16 kg/m3
Cloud Height: 1716 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:19 ISS:Ok CON:4.6 RCP:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
-0.1 at 4:55 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  -   This Afternoon's and Tonight's Outlook
This
Afternoon
This Afternoon: Scattered Showers And Thunderstorms
Scattered Showers And T-Storms

Hi 93 °F
NWS forecast: Isolated rain showers before 4pm, then scattered showers and thunderstorms. Mostly cloudy. High near 93, with temperatures falling to around 91 in the afternoon. Heat index values as high as 100. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tonight

Tonight: Scattered Showers And Thunderstorms then Showers And Thunderstorms
Scattered Showers And T-Storms then Showers And T-Storms

Lo 73 °F
NWS forecast: Scattered showers and thunderstorms before 10pm, then showers and thunderstorms. Mostly cloudy. Low around 73, with temperatures rising to around 76 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: Scattered Showers And Thunderstorms then Showers And Thunderstorms
Scattered Showers And T-Storms then Showers And T-Storms
Thursday

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

Friday: Scattered Showers And Thunderstorms
Scattered Showers And T-Storms
Friday
Night
Friday Night: Scattered Showers And Thunderstorms
Scattered Showers And T-Storms
Saturday

Saturday: Scattered Showers And Thunderstorms
Scattered Showers And T-Storms
Saturday
Night
Saturday Night: Scattered Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Scattered Showers And T-Storms then Slight Chance Showers And T-Storms
Sunday

Sunday: Chance Rain Showers
Chance Rain Showers
Lo 73 °F Hi 80 °F Lo 70 °F Hi 80 °F Lo 66 °F Hi 78 °F Lo 65 °F Hi 80 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.