McKinney (TX)
September
Weather in McKinney, Texas for September 2026
Your guide to McKinney weather in September - trends and predictions
So far, September 2026 in McKinney shows a warmer trend than usual by 2.3 °F.
The forecast for the next days in McKinney predicts temperatures to be around 34 °F, close to the historical average.
In general, the average temperature in McKinney at the beginning of September is 35.1 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 32.4 °F by the end of September.
The climate of McKinney in September is notably wet, with an average of 12 rainy days, and a total of 91.8 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
34°/21°
Temperatures
20 km/h
Avg max wind
54 %
Avg humidity
McKinney Weather September
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Temperatures trend during September in McKinney
See the weather trend as well as the moving average line
September weather in McKinney day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 36° /22° | 0.4 mm | 8 | |
| Sept. 2 |  Cloudy | 35° /22° | 3.6 mm | 8 | |
| Sept. 3 |  Thundery outbreaks possible | 33° /22° | 1.5 mm | 7 | |
| Sept. 4 |  Sunny | 34° /22° | 1.1 mm | 8 | |
| Sept. 5 | Partly cloudy | 37° /23° | 0.4 mm | 9 | |
| Sept. 6 | Thundery outbreaks possible | 35° /22° | 6.6 mm | 9 | |
| Sept. 7 | Sunny | 36° /22° | 0 mm | 8 | |
| Sept. 8 | Sunny | 37° /21° | 0.1 mm | 9 | |
| Sept. 9 | Sunny | 35° /20° | 0.4 mm | 9 | |
| Sept. 10 | Sunny | 35° /19° | 0.2 mm | 9 | |
| Sept. 11 |  Light rain shower | 34° /21° | 2.6 mm | 7 | |
| Sept. 12 | Sunny | 34° /22° | 16.1 mm | 8 | |
| Sept. 13 | Cloudy | 35° /23° | 0 mm | 8 | |
| Sept. 14 |  Overcast | 35° /22° | 1.4 mm | 8 | |
| Sept. 15 | Overcast | 35° /23° | 0.6 mm | 8 | |
| Sept. 16 | Partly cloudy | 35° /23° | 0.3 mm | 9 | |
| Sept. 17 | Overcast | 36° /27° | 0 mm | 7.8 | |
| Sept. 18 | Sunny | 38° /27° | 0 mm | 8.1 | |
| Sept. 19 | Sunny | 37° /26° | 0 mm | 8.5 | |
| Sept. 20 | Overcast | 37° /26° | 0 mm | 8.4 | |
| Sept. 21 | Sunny | 35° /25° | 0.2 mm | 8 | |
| Sept. 22 | Patchy rain possible | 36° /24° | 0.6 mm | 9 | |
| Sept. 23 | Cloudy | 35° /26° | 0 mm | 8 | |
| Sept. 24 | Patchy rain possible | 33° /20° | 1.5 mm | 8 | |
| Sept. 25 | Sunny | 32° /18° | 0 mm | 8 | |
| Sept. 26 | Sunny | 31° /18° | 0 mm | 8 | |
| Sept. 27 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 28 | Sunny | 33° /18° | 0 mm | 8 | |
| Sept. 29 | Sunny | 33° /18° | 0 mm | 8 | |
| Sept. 30 | Sunny | 34° /20° | 0 mm | 8 | |
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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.
Change Month
McKinney in September - FAQ
What are the expected maximum and minimum temperatures in McKinney during September?
During September, expect a variety of temperatures with highs around 34° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in McKinney during September?
Moderate rainfall is anticipated in McKinney during September, with a total of 91.8 mm spread over approximately 12 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 20 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 💧
Typically, McKinney has 12 rainy days in September with a total of 91.8 mm of rainfall.
UV exposure in McKinney during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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