Climate averages 1991–2020
McKinney weather
in July.
A hot, moderately wet month: the 2nd warmest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in McKinney: daytime highs average 33.8°C and nights cool to about 24.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 50 mm of rain on roughly 6 days, which makes July a moderately wet month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 14 h 07 min on an average July day.
The nearest other city in this atlas is Allen (12 km away). In July its highs average 33.8°C, about as warm as McKinney, with 46 mm of rain.
Among the 498 cities listed in the United States, McKinney ranks joint 72nd of 498 for the warmest July highs and joint 207th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; McKinney is 3.5°C warmer than that mean.
From July to August, average highs rise by 0.1°C to 33.9°C, and monthly rainfall stays at 50 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
McKinney climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 12.2°C3.0°C | 3.0°C | 70 | 6.8 | 10.210 h |
| February | 14.7°C5.0°C | 5.0°C | 74 | 7.6 | 11.011 h |
| March | 18.8°C8.9°C | 8.9°C | 105 | 9.4 | 12.012 h |
| April | 23.1°C13.1°C | 13.1°C | 118 | 9.1 | 13.013 h |
| May | 27.1°C18.1°C | 18.1°C | 144 | 11.5 | 13.914 h |
| June | 31.2°C22.4°C | 22.4°C | 91 | 9.1 | 14.314 h |
| July, selected | 33.8°C24.8°C | 24.8°C | 50 | 6.2 | 14.114 h |
| August | 33.9°C24.8°C | 24.8°C | 50 | 5.8 | 13.413 h |
| September | 30.0°C20.9°C | 20.9°C | 78 | 6.8 | 12.412 h |
| October | 24.4°C14.9°C | 14.9°C | 104 | 7.9 | 11.411 h |
| November | 17.9°C8.9°C | 8.9°C | 94 | 7.2 | 10.510 h |
| December | 13.1°C4.3°C | 4.3°C | 94 | 7.2 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Allen in JulyUnited States · 12 kmHigh 33.8°C · Low 24.9°C · 46 mm rain
- Frisco in JulyUnited States · 20 kmHigh 33.8°C · Low 24.8°C · 47 mm rain
- Plano in JulyUnited States · 21 kmHigh 33.8°C · Low 24.9°C · 46 mm rain
- Richardson in JulyUnited States · 30 kmHigh 34.0°C · Low 24.9°C · 46 mm rain
- Garland in JulyUnited States · 32 kmHigh 34.0°C · Low 24.9°C · 46 mm rain
- Carrollton in JulyUnited States · 37 kmHigh 34.3°C · Low 25.3°C · 45 mm rain
- Lewisville in JulyUnited States · 39 kmHigh 34.3°C · Low 25.3°C · 45 mm rain
- Mesquite in JulyUnited States · 48 kmHigh 34.2°C · Low 25.0°C · 43 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for McKinney) is explained once on the McKinney year overview and on the Sources, method and limits page.