McKinney in Fall
In fall (September, October and November), McKinney sees average daytime highs around 76°F and overnight lows near 57°F, with 10.9 in of rain over about 22 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 90°F in early September to 61°F by late November. The sky is clear or mostly clear about 52% of the time across fall, and the air most often feels dry.
Fall is McKinney's 2nd-best season to visit on our travel score. For the whole year in context, see McKinney's year-round climate.
- Avg daytime high
- 76°F
- 2nd-warmest season
- Avg overnight low
- 57°F
- Rainfall
- 10.9 in
- 22 wet days
- Avg wind
- 8 mph
- Travel score
- 6.4
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in McKinney in Fall
Over the season highs ease from about 90°F in early September to 61°F by late November.
A typical fall day in McKinney reaches about 76°F and drops to 57°F overnight. The warmest of the three months is September, the coolest November.
How fall really feels in McKinney
Once humidity and wind are folded in, fall brings about 9 days that feel above 90°F and 0 that feel at or below 32°F.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
McKinney weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 55° / 37° | 2.8 | 6.8 | 0.5 | 10.1 | 3.8 |
| Feb | 59° / 40° | 2.9 | 7.5 | 0.6 | 10.8 | 4.8 |
| Mar | 66° / 47° | 4.1 | 9.5 | 0.3 | 11.7 | 6.2 |
| Apr | 74° / 55° | 4.6 | 9.2 | 0 | 12.8 | 7.0 |
| May | 81° / 64° | 5.7 | 11.5 | 0 | 13.7 | 6.1 |
| Jun | 89° / 72° | 3.6 | 9.1 | 0 | 14.2 | 4.4 |
| Jul | 93° / 75° | 2.0 | 6.2 | 0 | 14 | 3.4 |
| Aug | 93° / 75° | 2.0 | 5.8 | 0 | 13.2 | 3.4 |
| Sep | 87° / 68° | 3.1 | 6.8 | 0 | 12.2 | 5.4 |
| Oct | 76° / 57° | 4.1 | 7.9 | 0 | 11.2 | 7.4 |
| Nov | 65° / 46° | 3.7 | 7.2 | 0 | 10.3 | 6.4 |
| Dec | 56° / 39° | 3.8 | 7.2 | 0.3 | 9.8 | 4.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 52% of the time across fall.
Chance of precipitation in Fall
McKinney gets around 10.9 in of rain over 22 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 8 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 42 min in early September to 10 hours by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.0 kWh/m².
Is fall a good time to visit McKinney?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit McKinney for sightseeing.
What to pack for McKinney in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, McKinney sees daytime highs around 76°F and nights near 57°F. Pack light clothes. Worth having: sun protection. About 22 days see rain.
UV index in McKinney in Fall
Clear-sky midday UV across fall averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in McKinney peaks around July 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 6 | 9 | 9 | 10 | 10 | 10 | 8 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 6 | High |
| Apr | 9 | Very high |
| May | 9 | Very high |
| Jun | 10 | Very high |
| Jul | 10 | Extreme |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in McKinney in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in McKinney is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (October, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 8 | 10 | 11 | 14 | 16 | 19 | 15 | 11 | 8 | 8 | 8 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 10 | Good |
| Apr | 11 | Good |
| May | 14 | Moderate |
| Jun | 16 | Moderate |
| Jul | 19 | Moderate |
| Aug | 15 | Moderate |
| Sep | 11 | Good |
| Oct | 8 | Good |
| Nov | 8 | Good |
| Dec | 8 | Good |
Where is McKinney?
McKinney sits at 33.2°N, 96.6°W, 630 ft above sea level, in United States. The nearest listed city is Allen, 7.5 mi away.
Topography around McKinney
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of McKinney.
Within 2 miles, the terrain around McKinney has only modest variations in elevation — a maximum elevation change of 164 ft around an average of 594 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 318 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 722 ft.
The land around McKinney is covered by artificial surfaces (38%), trees (27%) and grassland (24%) within 2 miles, grassland (37%), trees (24%) and artificial surfaces (22%) within 10 miles, and grassland (47%) and trees (26%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for McKinney (33.1976°, -96.6153°, elevation 630 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.