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United States weather

Weather in McKinney, Texas for September 2026

Your guide to McKinney weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in McKinney at the beginning of September is 34.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 32.6 °F by the end of September.

    • Rain 🌧️

  • The climate of McKinney in September is notably wet, with an average of 11 rainy days, and a total of 68.1 mm of precipitation.

    • More

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Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
34°/20°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
53 %
Avg humidity

McKinney Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Partly cloudy
34°
2
Cloudy
34°
3
Thundery outbreaks possible
33°
4
Thundery outbreaks possible
34°
5
Partly cloudy
36°
6
Thundery outbreaks possible
34°
7
Fog
34°
8
Sunny
36°
9
Sunny
34°
10
Sunny
35°
11
Light rain shower
33°
12
Sunny
33°
13
Cloudy
33°
14
Mist
34°
15
Overcast
33°
16
Partly cloudy
34°
17
Sunny
35°
18
Sunny
36°
19
Overcast
36°
20
Patchy rain possible
36°
21
Thundery outbreaks possible
37°
22
Light rain shower
35°
23
Thundery outbreaks possible
33°
24
Thundery outbreaks possible
33°
25
Light rain shower
30°
26
Mist
32°
27
Sunny
33°
28
Partly cloudy
33°
29
Sunny
34°
30
Sunny
33°

Temperatures trend during September in McKinney

See the weather trend as well as the moving average line

September weather in McKinney day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Partly cloudy
Partly cloudy
 34° /21° 0.6 mm 8
Sept. 2 Cloudy
Cloudy
 34° /22° 4.8 mm 7
Sept. 3 Thundery outbreaks possible
Thundery outbreaks possible
 33° /22° 2 mm 7
Sept. 4 Thundery outbreaks possible
Thundery outbreaks possible
 34° /22° 1.4 mm 8
Sept. 5 Partly cloudy
Partly cloudy
 36° /23° 0.5 mm 8
Sept. 6 Thundery outbreaks possible
Thundery outbreaks possible
 34° /21° 8.7 mm 8
Sept. 7 Fog
Fog
 34° /21° 0 mm 8
Sept. 8 Sunny
Sunny
 36° /20° 0.1 mm 9
Sept. 9 Sunny
Sunny
 34° /18° 0.5 mm 8
Sept. 10 Sunny
Sunny
 35° /17° 0 mm 8
Sept. 11 Light rain shower
Light rain shower
 33° /20° 1.6 mm 7
Sept. 12 Sunny
Sunny
 33° /21° 21.5 mm 8
Sept. 13 Cloudy
Cloudy
 33° /22° 0 mm 8
Sept. 14 Mist
Mist
 34° /21° 1.9 mm 7
Sept. 15 Overcast
Overcast
 33° /23° 0.8 mm 7
Sept. 16 Partly cloudy
Partly cloudy
 34° /22° 0.4 mm 8
Sept. 17 Sunny
Sunny
 35° /21° 0 mm 8
Sept. 18 Sunny
Sunny
 36° /23° 1.1 mm 8
Sept. 19 Overcast
Overcast
 36° /22° 0.6 mm 8
Sept. 20 Patchy rain possible
Patchy rain possible
 36° /22° 0.5 mm 8
Sept. 21 Thundery outbreaks possible
Thundery outbreaks possible
 37° /23° 0.7 mm 8
Sept. 22 Light rain shower
Light rain shower
 35° /22° 2.9 mm 8
Sept. 23 Thundery outbreaks possible
Thundery outbreaks possible
 33° /23° 10.6 mm 7
Sept. 24 Thundery outbreaks possible
Thundery outbreaks possible
 33° /22° 28 mm 7
Sept. 25 Light rain shower
Light rain shower
 30° /19° 2.5 mm 7
Sept. 26 Mist
Mist
 32° /17° 0 mm 8
Sept. 27 Sunny
Sunny
 33° /17° 0 mm 8
Sept. 28 Partly cloudy
Partly cloudy
 33° /19° 0 mm 8
Sept. 29 Sunny
Sunny
 34° /19° 0 mm 8
Sept. 30 Sunny
Sunny
 33° /19° 0 mm 8
Next
Important Notice
Our weather forecast for McKinney in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the McKinney forecast closer to your planned date for the most up-to-date weather information.
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McKinney in September - FAQ

What are the expected maximum and minimum temperatures in McKinney during September?
Expect warm days with temperatures around 34°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in McKinney during September?
Moderate rainfall is anticipated in McKinney during September, with a total of 68.1 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in McKinney during September?
The average wind speed in McKinney during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in McKinney

Explore the daily rainfall trends and prepare for McKinneys September weather 💧

UV exposure in McKinney during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is McKinney?

Get accurate weather forecasts for McKinney, located at latitude 33.198 and longitude -96.615. Stay updated with localized weather information tailored for McKinney.

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