Extreme Heat Warning EXTREME HEAT WARNING - Plano, Collin County, Texas
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Updated: @ 19-Aug-2026 6:00am - next update at 6:05am  
Summary / Temperature Wind Precipitation Outlook


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

83.8°F Colder 1.2°F than last hour.
Warm
Currently 83.8, Max: 91.3, Min: 83.7 Feels like:
88°F

24-hr
difference
1°FWarmer 1°F than yesterday at this time.
TEMP HIGH LOW
Today 91.3°F
12:00am
83.7°F
5:41am
Yesterday 106.2°F
3:13pm
81.6°F
7:09am
Record 108°F
2023
62°F
1940
Normal 96°F
76°F
 Wind from S S
2.1
Gust:
1.1
Light Air

60-Min Avg: 3.5 mph
120-Min Avg: 2.3 mph
Max Gust: 14.3 mph 5:56am
Month: 30.8 mph Aug 9
Today: 0.00 in
Yesterday: 0.00 in
Last
Rain:
8/4/2026
6:09 PM
August: 0.01 in
Last 7 Days: 0.00 in
Rain Season:1 22.54 in
Rain Days: 58 in 2026
15 days since last rain
Wednesday

Wednesday: Sunny
Sunny

Barometer Humidity/Dew Point Moon
Current: 29.898 inHg  
1-Hr Trend: Steady
3-Hr Trend: Steady
High: 29.909  |  Low: 29.882
Humidity: 64 % Increased 3% since last hour.
Humidex: 99.4°F
Dewpoint: 70.3°F Increased 0.2°F since last hour.
Wetbulb: 74.7°F
Waxing Crescent
Waxing Crescent, Moon at 6 days in cycle
44%
Illuminated
UV Forecast Current Solar Energy
19-Aug-2026   Very High   9.6   
20-Aug-2026   Very High   9.7   
21-Aug-2026   Very High   9.7   
Energy: 0 W/m2 (0%)
High: 0 at  12:00am
Apparent Temp: 89.0°F
Heat Index Cooling Degree Days Sun
Current: 88.1°F
Today: 93.9°F  12:04am
Yesterday: 113.6°F
Last Week: 114.7°F
Record: 127.2°F   26-Aug-2023
Today: 5.5
August: 452.7
2026 to Date: 2346.3
Heating Degree Days
2026 to Date: 930.5
Sunlight Hours
Possible hours of Daylight
13:16 hrs:min
-00:01:49 Min
Almanac Irrigation Index5 Station All Time Records Fire Risk
Sunrise: 6:52am
Sunset: 8:08pm
Moonrise: 1:58pm
Moonset: 11:20pm
Full Moon: August 28 2026
New Moon: 03:28 UTC September 11 2026
Updated at Midnight
Current: 0.10 in   
7-Days Rain: 0.00 in   
7-Days ET: 2.34 in   
7-Day: -2.34 in 2.34 in water in deficit of what evaporated in last 7 days.
August: -5.61 in 5.61 in water in deficit of what evaporated this month.
Irrigation System: Standby
Other Conditions
Air Density: 1.16 kg/m3
Cloud Height: 3840 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:
8.2 at 06:00 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 Wednesday's Outlook
Overnight

Overnight: Mostly Clear
Mostly Clear

Lo 83 °F
NWS forecast: Mostly clear. Low around 83, with temperatures rising to around 85 overnight. South southwest wind around 10 mph.
Wednesday

Wednesday: Sunny
Sunny

Hi 105 °F
NWS forecast: Sunny, with a high near 105. Heat index values as high as 106. Southwest wind around 10 mph.
 NWS NWS Short Term Weather Forecast
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday

Thursday: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

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

Saturday: Sunny
Sunny
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Hi 105 °F Lo 82 °F Hi 104 °F Lo 82 °F Hi 104 °F Lo 81 °F Hi 103 °F Lo 82 °F
US Radar & Infrared Satellite
US Radar National Infrared Satellite
Radar/Satellite images courtesy of Weather Underground.