McKinney, Texas Weather
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Climate of McKinney: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), August is usually the hottest month in McKinney, with average daytime highs around 36°C. January is the coolest, when nights typically fall to about 1°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 36°C, so the seasons feel very different from each other.
The area receives about 920 mm of rain in a typical year. Most of it falls from May and October, and May is the wettest month at roughly 116 mm.
For outdoor plans and travel, March to April, September and November usually offer the most comfortable weather in McKinney, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 12° | 1° | 58 mm | 73% |
| Feb | 15° | 3° | 67 mm | 74% |
| Mar | 20° | 8° | 88 mm | 73% |
| Apr | 25° | 12° | 83 mm | 72% |
| May | 29° | 17° | 116 mm | 72% |
| Jun | 33° | 22° | 96 mm | 67% |
| Jul | 36° | 24° | 55 mm | 61% |
| Aug | 36° | 24° | 62 mm | 58% |
| Sep | 32° | 20° | 77 mm | 63% |
| Oct | 26° | 13° | 102 mm | 66% |
| Nov | 19° | 7° | 57 mm | 71% |
| Dec | 13° | 2° | 61 mm | 73% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around McKinney. Values describe typical conditions, not a forecast.
About McKinney weather
McKinney is a place in Texas's vast Gulf Coast-to-arid-west range — humid subtropical in the east, semi-arid to desert further west, located about 50 km north of Dallas. McKinney gets long, hot summers (June–September) with highs regularly above 35°C, more humid near the Gulf coast each year. McKinney closes out the year with mild winters across most of the state, with occasional cold snaps and rare snow. This page shows live, auto-refreshing weather for McKinney: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
McKinney is about 50 km north of Dallas, in Texas.
McKinney sees mild winters across most of the state, with occasional cold snaps and rare snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for McKinney's exact coordinates. No fixed schedule, the page updates whenever you load it.
August is usually the hottest month in McKinney, with average daytime highs of about 36°C and nights around 24°C.
The coldest nights come in January, when the average low is about 1°C and daytime highs reach around 12°C. Frost is possible on clear, calm nights.
McKinney receives about 920 mm of rain in a typical year. May is the wettest month at roughly 116 mm, and the main rainy period is May and October.
March to April, September and November usually offer the most comfortable weather in McKinney, with mild daytime temperatures and little rain.
In November McKinney typically sees daytime highs near 19°C and lows near 7°C, with about 57 mm of rain over the month and average humidity around 71%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for McKinney updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
McKinney's day-to-day weather follows the broader pattern of Texas described above. See the hourly weather forecast or the air quality index for more detail.