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Weather in McKinney for September 2025

Your guide to McKinney weather in September - trends and predictions
  • In general, the average temperature in McKinney at the beginning of September is 35 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 33.7 °F by the end of September.

  • The climate of McKinney in September is notably wet, with an average of 11 rainy days.

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Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
36°/21°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
51 %
Avg humidity

McKinney in September average weather

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Temperatures trend during September in McKinney

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
Sept. 1 Partly cloudy
Partly cloudy
35° /21° 0.9 mm 8
Sept. 2 Cloudy
Cloudy
36° /21° 0.6 mm 8
Sept. 3 Thundery outbreaks possible
Thundery outbreaks possible
32° /21° 2.9 mm 7
Sept. 4 Thundery outbreaks possible
Thundery outbreaks possible
31° /21° 2.1 mm 7
Sept. 5 Partly cloudy
Partly cloudy
35° /21° 0.7 mm 8
Sept. 6 Thundery outbreaks possible
Thundery outbreaks possible
38° /24° 0 mm 9
Sept. 7 Fog
Fog
38° /22° 0.1 mm 9
Sept. 8 Cloudy
Cloudy
38° /21° 0.1 mm 9
Sept. 9 Patchy rain possible
Patchy rain possible
35° /19° 0.8 mm 8
Sept. 10 Partly cloudy
Partly cloudy
35° /17° 0 mm 9
Sept. 11 Light rain shower
Light rain shower
31° /20° 2.4 mm 7
Sept. 12 Torrential rain shower
Torrential rain shower
31° /20° 32.2 mm 7
Sept. 13 Cloudy
Cloudy
32° /20° 0 mm 8
Sept. 14 Mist
Mist
34° /20° 2.8 mm 8
Sept. 15 Overcast
Overcast
33° /21° 1.2 mm 7
Sept. 16 Partly cloudy
Partly cloudy
33° /20° 0.6 mm 8
Sept. 17 Sunny
Sunny
35° /18° 0 mm 8
Sept. 18 Sunny
Sunny
36° /21° 0 mm 9
Sept. 19 Overcast
Overcast
36° /20° 0 mm 9
Sept. 20 Patchy rain possible
Patchy rain possible
37° /21° 0.8 mm 9
Sept. 21 Thundery outbreaks possible
Thundery outbreaks possible
38° /22° 1.1 mm 9
Sept. 22 Light rain shower
Light rain shower
34° /22° 4.4 mm 8
Sept. 23 Thundery outbreaks possible
Thundery outbreaks possible
32° /23° 7.1 mm 7
Sept. 24 Thundery outbreaks possible
Thundery outbreaks possible
35° /22° 3.5 mm 8
Sept. 25 Light rain shower
Light rain shower
31° /20° 3.8 mm 7
Sept. 26 Mist
Mist
33° /16° 0 mm 8
Sept. 27 Sunny
Sunny
33° /16° 0 mm 9
Sept. 28 Partly cloudy
Partly cloudy
34° /19° 0 mm 9
Sept. 29 Sunny
Sunny
35° /19° 0 mm 8
Sept. 30 Sunny
Sunny
35° /19° 0 mm 9
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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.

McKinney in September - FAQ

What are the expected maximum and minimum temperatures in McKinney during September?
With daytime temperatures soaring above 36° and not dropping much below 21° at night, September in McKinney is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in McKinney during September?
Significant rainfall exceeding 102.3 mm is expected in McKinney during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in McKinney during September?
The average wind speed in McKinney during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

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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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