Climate
McKinney weather by month
Average highs, lows, rain and snow for every month, from 30 years of weather records.
Average temperatures
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Best time to visit: March, April, November, when highs are mild and rain is lightest.
Month by month
| Month | High | Low | Rain | Wet days |
|---|---|---|---|---|
| January | 56°F | 34°F | 2.7 in | 6 |
| February | 60°F | 38°F | 2.6 in | 7 |
| March | 68°F | 46°F | 3.5 in | 9 |
| April | 75°F | 53°F | 3.6 in | 9 |
| May | 83°F | 62°F | 4.8 in | 11 |
| June | 91°F | 70°F | 3.6 in | 8 |
| July | 95°F | 74°F | 2.0 in | 5 |
| August | 96°F | 73°F | 1.7 in | 5 |
| September | 88°F | 66°F | 2.8 in | 7 |
| October | 78°F | 54°F | 4.4 in | 8 |
| November | 66°F | 44°F | 3.2 in | 8 |
| December | 57°F | 36°F | 3.5 in | 7 |
NOAA U.S. Climate Normals 1991–2020, Mckinney Muni Ap, Tx Us (3.1 mi away, 580 ft). Wet days: days with at least 0.01 in of precipitation.
Questions
What is the hottest month in McKinney?
August, with an average high of 96°F and low of 73°F.
What is the coldest month in McKinney?
January, with an average low of 34°F and high of 56°F.
When does it rain most in McKinney?
May is the wettest month, averaging 4.8 in of precipitation; the year totals about 38.4 inches.
What is the best time to visit McKinney?
For mild weather (highs between 65°F and 85°F) with the least rain, March, April, November.
Where do these numbers come from?
NOAA’s 1991–2020 U.S. Climate Normals for the Mckinney Muni Ap weather station, 3.1 miles from downtown: 30-year averages, not a forecast.