Flash Flood Warning FLASH FLOOD WARNING - Plano, Collin County, Texas
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Updated: @ 27-May-2026 12:45pm - next update at 12:50pm  
Summary / Temperature Wind Precipitation Outlook


Mostly cloudy, Stopped raining
Mostly cloudy, Stopped raining

69.9°F Warmer 0.1°F than last hour.
Comfortable
Currently 69.9, Max: 70.6, Min: 67.1 Feels like:
66°F

24-hr
difference
-15.8°FColder 15.8°F than yesterday at this time.
TEMP HIGH LOW
Today 70.6°F
11:05am
67.1°F
2:30am
Yesterday 87.6°F
1:56pm
69.5°F
11:59pm
Record 103°F
1928
47°F
1901
Normal 87°F
68°F
 Wind from NNW NNW
7.9
Gust:
1.1
Gentle Breeze

60-Min Avg: 4.6 mph
120-Min Avg: 2.3 mph
Max Gust: 14.3 mph 2:58am
Month: 41.7 mph May 17
Today: 1.20 in
Rate (/hr): 0.030 in
Storm Rain: 1.05 in
Yesterday: 0.01 in
May: 4.47 in
Last 7 Days: 0.71 in
Rain Season:1 15.39 in
Rain Days: 42 in 2026
9 rain days in May
Tonight

Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 69. Southeast wind around 5 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms


Barometer Humidity/Dew Point Moon
Current: 29.850 inHg Rising 0.01 °F/hr
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 29.875  |  Low: 29.736
Humidity: 92 % Decreased 1% since last hour.
Humidex: 83.1°F
Dewpoint: 67.5°F Decreased 0.2°F since last hour.
Wetbulb: 68.3°F
Waxing Gibbous
Waxing Gibbous, Moon at 11 days in cycle
88%
Illuminated
Current UV Index Current Solar Energy
   2.8    Low 
High: 2.9 @ 12:33pm
Time to Burn: 40 Mins
Energy: 0 W/m2 (29%)
High: 370 at  12:36pm
Apparent Temp: 79.8°F
Heat Index Cooling Degree Days Sun
Current: 65.9°F
Today: 70.6°F  11:05am
Yesterday: 92.6°F
Last Week: 94.4°F
Record: 127.2°F   26-Aug-2023
Today: 1.6
May: 220.8
2026 to Date: 582.7
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
14:07 hrs:min
+ 00:01:04 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:20am
Sunset: 8:27pm
Moonrise: 5:28pm
Moonset: 3:51am
Full Moon: May 31 2026
New Moon: 02:55 UTC June 15 2026
Updated at Midnight
Current: 0.04 in   
7-Days Rain: 0.71 in   
7-Days ET: 1.11 in   
7-Day: -0.4 in 0.4 in water in deficit of what evaporated in last 7 days.
May: -0.25 in 0.25 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.19 kg/m3
Cloud Height: 1311 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:18 ISS:Ok CON:4.6 RCP:98%
Chandler Burning Index
Chandler Burning Index: LOW
Currently:
-1.1 at 12:45 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: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 81. South wind around 5 mph.
Chance
T-storms


Hi 81 °F
NWS forecast: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. South wind around 5 mph.
Tonight

Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 69. Southeast wind around 5 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms


Lo 69 °F
NWS forecast: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Southeast wind around 5 mph. Chance of precipitation is 20%.
 NWS NWS Short Term Weather Forecast
Tonight

Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 69. Southeast wind around 5 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms

Thursday

Thursday: A chance of showers, with thunderstorms also possible after 10am.  Mostly sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.  Chance of precipitation is 40%.
Chance
Showers then
Chance
T-storms
Thursday
Night
Thursday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers.  Partly cloudy, with a low around 70. Northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.
Chance
T-storms

Friday

Friday: A 20 percent chance of showers before 1pm.  Mostly sunny, with a high near 88. South southwest wind around 5 mph.
Slight Chance
Showers

Friday
Night
Friday Night: A 20 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 74. South wind around 5 mph.
Partly Cloudy
then Slight
Chance
T-storms
Saturday

Saturday: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 90. South wind 5 to 10 mph.
Slight Chance
T-storms

Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 72. South southeast wind 5 to 10 mph becoming east after midnight.
Chance
T-storms

Sunday

Sunday: A 40 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 89. South southeast wind around 5 mph.
Chance
T-storms

Lo 69 °F Hi 86 °F Lo 70 °F Hi 88 °F Lo 74 °F Hi 90 °F Lo 72 °F Hi 89 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.