McKinney, Texas Weather Conditions

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Current Conditions

  • 78°
  • Clear
  • Wind: Calm
  • Humidity: 66%
  • Visibility: 10.0 miles
  • Dew Point: 66°
  • Pressure: 29.88 in. 0

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Next 12 Hours

4  am
7  am
10  am
1  pm
4  pm
Clear
Clear
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Clear
Clear
80°
78°
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98°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Partly Cloudy
  • High: 100 °
  • Low: 78 °
  • Partly Cloudy
  • Wednesday
  • Clear
  • High: 101 °
  • Low: 79 °
  • Clear
  • Thursday
  • Partly Cloudy
  • High: 103 °
  • Low: 79 °
  • Partly Cloudy
  • Friday
  • Clear
  • High: 104 °
  • Low: 79 °
  • Clear
  • Saturday
  • Clear
  • High: 104 °
  • Low: 79 °
  • Clear

Forecast for McKinney, Texas

Updated: 3:00 am CDT on August 4, 2015

  • Today

    Partly sunny in the morning then becoming mostly sunny. Highs in the upper 90s. South winds 5 to 10 mph.

  • Tonight

    Partly cloudy. Lows in the upper 70s. South winds 5 to 10 mph.

  • Wednesday

    Mostly sunny. Highs in the upper 90s. South winds 10 to 15 mph.

  • Wednesday Night

    Partly cloudy. Lows around 80. South winds 10 to 15 mph.

  • Thursday

    Mostly sunny. Highs around 100. Southwest winds 10 to 15 mph. Highest heat index readings 108 to 109 in the afternoon.

  • Thursday Night

    Mostly clear. Lows around 80.

  • Friday

    Sunny. Highs around 100.

  • Friday Night

    Mostly clear. Lows around 80.

  • Saturday

    Sunny. Highs around 102.

  • Saturday Night

    Mostly clear. Lows around 80.

  • Sunday

    Sunny. Highs around 102.

  • Sunday Night

    Mostly clear. Lows in the lower 80s.

  • Monday

    Sunny. Highs around 102.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Encore Wire Campus, McKinney, TX

Updated: 4:33 AM CDT

Temperature: 79.6 °F Dew Point: 67 °F Humidity: 65% Wind: SSW at 1.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Max Drive, Melissa, TX

Updated: 4:35 AM CDT

Temperature: 75.9 °F Dew Point: 68 °F Humidity: 75% Wind: North at - Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Eldorado Ridge, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 74.3 °F Dew Point: 69 °F Humidity: 84% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Finch Ave, McKinney, TX

Updated: 4:27 AM CDT

Temperature: 78.8 °F Dew Point: 67 °F Humidity: 68% Wind: Calm Pressure: 29.87 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: Heritage Ranch, Fairview, TX

Updated: 4:36 AM CDT

Temperature: 72.9 °F Dew Point: 70 °F Humidity: 90% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: K5BL LIVE WX - El Fenix, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 82.9 °F Dew Point: 66 °F Humidity: 57% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Hillcrest Court, McKinney, TX

Updated: 4:36 AM CDT

Temperature: 82.9 °F Dew Point: 64 °F Humidity: 53% Wind: North at - Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Gwendola Drive - Northwood Park, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 81.0 °F Dew Point: 63 °F Humidity: 54% Wind: Calm Pressure: 31.09 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Pembroke Lane, McKinney, TX

Updated: 4:35 AM CDT

Temperature: 78.3 °F Dew Point: 61 °F Humidity: 54% Wind: North at - Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Sandy Glen, McKinney, TX

Updated: 4:34 AM CDT

Temperature: 76.5 °F Dew Point: 63 °F Humidity: 64% Wind: Calm Pressure: 29.58 in Hourly Precipitation: - Heat Index: 78 °F Graphs

Location: Shady Glen - McKinney, McKinney, TX

Updated: 4:29 AM CDT

Temperature: 79.0 °F Dew Point: 66 °F Humidity: 65% Wind: Calm Pressure: 29.79 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: JLD Weather Center, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 82.7 °F Dew Point: 64 °F Humidity: 54% Wind: South at 4.0 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Vista of Eldorado, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 81.8 °F Dew Point: 66 °F Humidity: 58% Wind: SSE at 1.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Fawn Hollow, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 78.4 °F Dew Point: 64 °F Humidity: 62% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Bridlegate, Fairview, TX

Updated: 4:40 AM CDT

Temperature: 80.9 °F Dew Point: 67 °F Humidity: 62% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Stacy Ridge Estates 2, Allen, TX

Updated: 4:40 AM CDT

Temperature: 79.1 °F Dew Point: 67 °F Humidity: 66% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Chanceller Creek, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 79.2 °F Dew Point: 66 °F Humidity: 64% Wind: Calm Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Amherst Estates - Lucas, TX, Allen, TX

Updated: 4:40 AM CDT

Temperature: 80.2 °F Dew Point: 67 °F Humidity: 63% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Butterfly Way, Fairview, TX

Updated: 4:35 AM CDT

Temperature: 82.4 °F Dew Point: 65 °F Humidity: 55% Wind: North at - Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Thompson Springs, Fairview, TX

Updated: 4:40 AM CDT

Temperature: 74.9 °F Dew Point: 67 °F Humidity: 77% Wind: Calm Pressure: 29.70 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Lost Creek Ranch, Allen, TX

Updated: 4:40 AM CDT

Temperature: 81.5 °F Dew Point: 66 °F Humidity: 59% Wind: SSE at 2.5 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Presidents Point, McKinney, TX

Updated: 4:40 AM CDT

Temperature: 80.6 °F Dew Point: 64 °F Humidity: 56% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Surrey Lane, McKinney, TX

Updated: 4:35 AM CDT

Temperature: 85.8 °F Dew Point: 66 °F Humidity: 50% Wind: North at - Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: New Hope, McKinney, TX

Updated: 4:35 AM CDT

Temperature: 79.2 °F Dew Point: 67 °F Humidity: 67% Wind: South at 1.7 mph Pressure: 29.91 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: Briar Ridge, McKinney, TX

Updated: 4:29 AM CDT

Temperature: 80.8 °F Dew Point: 66 °F Humidity: 61% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Lucas Creek, Lucas, TX

Updated: 4:40 AM CDT

Temperature: 77.2 °F Dew Point: 68 °F Humidity: 72% Wind: SSE at 1.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Skywatch McKinney, Mckinney, TX

Updated: 4:40 AM CDT

Temperature: 81.5 °F Dew Point: 65 °F Humidity: 57% Wind: South at 2.6 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Star Creek, Allen, TX

Updated: 4:28 AM CDT

Temperature: 78.3 °F Dew Point: 66 °F Humidity: 66% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Biltmoore Court, Allen, TX

Updated: 4:35 AM CDT

Temperature: 82.9 °F Dew Point: 65 °F Humidity: 54% Wind: North at - Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Allen, TX

Updated: 4:39 AM CDT

Temperature: 82.0 °F Dew Point: 67 °F Humidity: 60% Wind: SW at 4.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Mckinney, TX

Updated: 4:30 AM CDT

Temperature: 80.2 °F Dew Point: 62 °F Humidity: 54% Wind: Calm Pressure: 29.74 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: Charles River Court, Allen, TX

Updated: 4:35 AM CDT

Temperature: 83.3 °F Dew Point: 67 °F Humidity: 57% Wind: North at - Pressure: 29.97 in Hourly Precipitation: - Heat Index: 86 °F Graphs

Location: country club/main - ke5fco, Allen, TX

Updated: 4:36 AM CDT

Temperature: 79.9 °F Dew Point: 68 °F Humidity: 66% Wind: SW at 2.7 mph Pressure: 29.87 in Hourly Precipitation: - Heat Index: 82 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Fort Worth Texas 
300 am CDT Tuesday Aug 4 2015 


Discussion... 
North Texas will remain under the influence of weak northwest 
flow aloft over the area into early Wednesday...as we remain on 
the eastern periphery of the southwest U.S upper high. Another 
complex of thunderstorms over the Texas/OK Panhandle will track 
southeast into western OK and northwest Texas through sunrise. As it 
does so...activity should weaken as it encounters more subsidence... 
less instability and weakening and veering low level flow through 
850 mb. Bulk of moisture is located above 8-10 kft so will only 
advertise isolated showers or sprinkles across those counties for 
the morning hours. The high-based and light nature of rainfall 
will only yield spotty amounts of a trace to a few hundredths like 
the past few mornings. 


The shortwave disturbance triggering the Panhandle activity early 
this morning will track east over the OK/Kansas border area today and 
though a few showers could linger this afternoon across the 
eastern Red River valley...felt compelled to leave out any 
appreciable rain chances with column moisture decreasing as you go 
east. This may need to be amended today if forcing looks stronger 
than what current short-range models indicate. Another shortwave 
disturbance looks to drop southeast into the Ozarks tonight...but 
this will remain well northeast of our County Warning Area and will hold to a dry 
forecast. The southwest U.S upper ridge gradually expands east 
across the area in response to upper level energy deepening across 
the Pacific northwest and a cut off upper low approaches the California 
coastline on Wednesday. A thorough look at all models indicates 
the faster intensification of the upper high across our area late 
Wednesday into Thursday will likely keep any rain chances out of 
our northeast counties. As such...have removed the slight chances 
across the northeast counties late Wednesday night into Thursday 
morning. 


The upper high only looks to intensify over North Texas heading 
into the weekend and through early next week...as the eastern 
Continental U.S. Longwave trough deepens in response to the Hudson Bay 
circulation retrograding west over Manitoba and Ontario. This 
process will only intensify the subsidence and low level thermal 
ridge at 850 mb across the Southern Plains. Highs through Thursday 
will range from the upper 90s to 102 degrees...before heating up 
to between 100 to 105 degrees Friday and through the first half of 
next week. Records through the weekend look safe at dfw...but may 
be threatened early next week with lower record values around 105 
degrees. Waco/S records are hotter and do not appear to be in 
jeopardy. 


In addition to the heat...increasing southerly flow will increase 
surface dew points and humidity across North Texas as we head toward 
this weekend. Heat advisory criteria may be met in a few locales 
starting Wednesday but is more certain to be met for the period 
Thursday and beyond across a good part of the area. If you plan on 
being outdoors for work or recreation late this week into early 
next week...be prepared for the very hot conditions. 


05/ 


&& 


Aviation... 
/issued 1158 PM CDT Monday Aug 3 2015/ 
/06z tafs/ 


No significant concerns...continued VFR. Persistence forecast 
with generally southeasterly winds and passing middle/high clouds. 


High-based showers should remain northwest of the metroplex 
overnight. At best...this activity should only result in 
sprinkles...with a deep dry sub-cloud layer still in place. More 
widespread and vigorous convection is ongoing across West 
Texas and the Texas Panhandle...but once again...this activity 
will find an increasingly less favorable environment as it drifts 
eastward. Although the intensity should wane...measurable rainfall 
may be possible with any remnant showers that encroach on western 
portions of North Texas early Tuesday morning...but precipitation 
is unlikely at any taf sites. 


A seasonally weak surface pressure gradient will yield light 
winds overnight that will have a tendency to vary in direction. 
More organized boundary layer flow will ensue Tuesday morning... 
but the resulting southerly surface winds will remain generally 
below 12kts. 


25 




&& 


Preliminary point temps/pops... 
Dallas-ft. Worth, Texas 99 80 100 80 102 / 5 0 5 0 5 
Waco, Texas 100 78 100 78 101 / 0 0 5 0 0 
Paris, Texas 97 76 99 76 100 / 10 10 10 10 10 
Denton, Texas 98 78 100 77 102 / 5 5 5 5 5 
McKinney, Texas 97 78 99 79 100 / 5 5 5 5 10 
Dallas, Texas 100 81 101 81 102 / 5 0 5 5 5 
Terrell, Texas 99 77 99 77 101 / 0 0 5 5 5 
Corsicana, Texas 100 77 100 77 103 / 0 0 5 0 5 
Temple, Texas 100 75 100 76 101 / 0 0 5 0 0 
Mineral Wells, Texas 97 76 99 76 101 / 5 0 5 0 0 


&& 


Forward watches/warnings/advisories... 
none. 


&& 


$$ 


/05 






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