Climate averages 1991–2020
McKinney weather
in March.
A mild, wet month: the 8th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a mild month in McKinney: daytime highs average 18.8°C and nights cool to about 8.9°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 105 mm of rain on roughly 9 days, which makes March a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 57 min on an average March day.
The nearest other city in this atlas is Allen (12 km away). In March its highs average 19.0°C, about as warm as McKinney, with 100 mm of rain.
Among the 498 cities listed in the United States, McKinney ranks joint 162nd of 498 for the warmest March highs and joint 383rd of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; McKinney is 3.9°C warmer than that mean.
From March to April, average highs rise by 4.3°C to 23.1°C, and monthly rainfall rises from 105 mm to 118 mm.
The annual picture
March 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, selected | 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 | 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
March in nearby cities
- Allen in MarchUnited States · 12 kmHigh 19.0°C · Low 9.1°C · 100 mm rain
- Frisco in MarchUnited States · 20 kmHigh 18.9°C · Low 8.8°C · 101 mm rain
- Plano in MarchUnited States · 21 kmHigh 19.0°C · Low 9.1°C · 100 mm rain
- Richardson in MarchUnited States · 30 kmHigh 19.1°C · Low 9.1°C · 100 mm rain
- Garland in MarchUnited States · 32 kmHigh 19.2°C · Low 9.2°C · 100 mm rain
- Carrollton in MarchUnited States · 37 kmHigh 19.4°C · Low 9.4°C · 95 mm rain
- Lewisville in MarchUnited States · 39 kmHigh 19.5°C · Low 9.4°C · 95 mm rain
- Mesquite in MarchUnited States · 48 kmHigh 19.4°C · Low 9.3°C · 105 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.