McKinney
September
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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19
Dry days
11
Rainy days
0
Snow days
36°/21°
Temperatures
23 km/h
Avg max wind
51 %
Avg humidity
McKinney in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  35° | 2  36° | 3  32° | 4 31° | 5 35° | 6 38° | 7  38° |
| 8 38° | 9  35° | 10 35° | 11 31° | 12  31° | 13 32° | 14 34° |
| 15  33° | 16 33° | 17  35° | 18 36° | 19 36° | 20 37° | 21 38° |
| 22 34° | 23 32° | 24 35° | 25 31° | 26 33° | 27 33° | 28 34° |
| 29 35° | 30 35° |
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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 | 35° /21° | 0.9 mm | 8 | |
| Sept. 2 | Cloudy | 36° /21° | 0.6 mm | 8 | |
| Sept. 3 | Thundery outbreaks possible | 32° /21° | 2.9 mm | 7 | |
| Sept. 4 | Thundery outbreaks possible | 31° /21° | 2.1 mm | 7 | |
| Sept. 5 | Partly cloudy | 35° /21° | 0.7 mm | 8 | |
| Sept. 6 | Thundery outbreaks possible | 38° /24° | 0 mm | 9 | |
| Sept. 7 | Fog | 38° /22° | 0.1 mm | 9 | |
| Sept. 8 | Cloudy | 38° /21° | 0.1 mm | 9 | |
| Sept. 9 | Patchy rain possible | 35° /19° | 0.8 mm | 8 | |
| Sept. 10 | Partly cloudy | 35° /17° | 0 mm | 9 | |
| Sept. 11 | Light rain shower | 31° /20° | 2.4 mm | 7 | |
| Sept. 12 | Torrential rain shower | 31° /20° | 32.2 mm | 7 | |
| Sept. 13 | Cloudy | 32° /20° | 0 mm | 8 | |
| Sept. 14 | Mist | 34° /20° | 2.8 mm | 8 | |
| Sept. 15 | Overcast | 33° /21° | 1.2 mm | 7 | |
| Sept. 16 | Partly cloudy | 33° /20° | 0.6 mm | 8 | |
| Sept. 17 | Sunny | 35° /18° | 0 mm | 8 | |
| Sept. 18 | Sunny | 36° /21° | 0 mm | 9 | |
| Sept. 19 | Overcast | 36° /20° | 0 mm | 9 | |
| Sept. 20 | Patchy rain possible | 37° /21° | 0.8 mm | 9 | |
| Sept. 21 | Thundery outbreaks possible | 38° /22° | 1.1 mm | 9 | |
| Sept. 22 | Light rain shower | 34° /22° | 4.4 mm | 8 | |
| Sept. 23 | Thundery outbreaks possible | 32° /23° | 7.1 mm | 7 | |
| Sept. 24 | Thundery outbreaks possible | 35° /22° | 3.5 mm | 8 | |
| Sept. 25 | Light rain shower | 31° /20° | 3.8 mm | 7 | |
| Sept. 26 | Mist | 33° /16° | 0 mm | 8 | |
| Sept. 27 | Sunny | 33° /16° | 0 mm | 9 | |
| Sept. 28 | Partly cloudy | 34° /19° | 0 mm | 9 | |
| Sept. 29 | Sunny | 35° /19° | 0 mm | 8 | |
| Sept. 30 | 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.
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 ☀️
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