McKinney weather in May: McKinney, Texas: normal highs, lows, rain and records for May
McKinney in May has a normal high of 83°F and a normal low of 62°F, a daily mean of 73°F, rising from 78°F on the 1st to 88°F by the 31st. Measurable precipitation falls on 11 days in a normal May, 4.77 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 121 mm of precipitation in May.
- NOAA stationMcKinney Municipal Airport
- Station IDUSW00053914
- Location33.18°N 96.59°W
- Elevation580 ft (177 m)
- Population227,526
- Jan 56° 34°
- Feb 60° 38°
- Mar 68° 46°
- Apr 75° 53°
- May 83° 62°
- Jun 91° 70°
- Jul 95° 74°
- Aug 96° 73°
- Sep 88° 66°
- Oct 78° 54°
- Nov 66° 44°
- Dec 57° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is McKinney in May?
The normal high is 83°F and the normal low 62°F, for a daily mean of 72.6°F. May is 8.7°F warmer than April and 7.9°F cooler than June. May is the 5th warmest month of the year in McKinney and the wettest. Across the month the normal high rises 10°F, from 78°F on May 1 to 88°F on May 31. From one year to the next May's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Mays in three average between 70°F and 75°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 78°F | 57°F | 32% | 19% |
| May 8 | 80°F | 60°F | 33% | 19% |
| May 15 | 82°F | 62°F | 33% | 19% |
| May 22 | 85°F | 65°F | 33% | 19% |
| May 31 | 88°F | 67°F | 32% | 19% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 78°F | 57°F | 32% | 19% | 13 h 30 min |
| May 2 | 78°F | 58°F | 32% | 19% | 13 h 30 min |
| May 3 | 79°F | 58°F | 33% | 19% | 13 h 30 min |
| May 4 | 79°F | 58°F | 33% | 19% | 13 h 30 min |
| May 5 | 79°F | 59°F | 33% | 19% | 13 h 40 min |
| May 6 | 79°F | 59°F | 33% | 19% | 13 h 40 min |
| May 7 | 80°F | 59°F | 33% | 19% | 13 h 40 min |
| May 8 | 80°F | 60°F | 33% | 19% | 13 h 40 min |
| May 9 | 80°F | 60°F | 33% | 19% | 13 h 40 min |
| May 10 | 81°F | 60°F | 33% | 19% | 13 h 40 min |
| May 11 | 81°F | 61°F | 33% | 19% | 13 h 40 min |
| May 12 | 81°F | 61°F | 33% | 19% | 13 h 50 min |
| May 13 | 82°F | 62°F | 33% | 19% | 13 h 50 min |
| May 14 | 82°F | 62°F | 33% | 19% | 13 h 50 min |
| May 15 | 82°F | 62°F | 33% | 19% | 13 h 50 min |
| May 16 | 83°F | 63°F | 33% | 19% | 13 h 50 min |
| May 17 | 83°F | 63°F | 33% | 19% | 13 h 50 min |
| May 18 | 84°F | 63°F | 33% | 19% | 14 h |
| May 19 | 84°F | 64°F | 33% | 19% | 14 h |
| May 20 | 84°F | 64°F | 33% | 19% | 14 h |
| May 21 | 85°F | 64°F | 33% | 19% | 14 h |
| May 22 | 85°F | 65°F | 33% | 19% | 14 h |
| May 23 | 85°F | 65°F | 33% | 19% | 14 h |
| May 24 | 86°F | 65°F | 33% | 19% | 14 h |
| May 25 | 86°F | 65°F | 33% | 20% | 14 h |
| May 26 | 86°F | 66°F | 33% | 20% | 14 h 10 min |
| May 27 | 87°F | 66°F | 33% | 20% | 14 h 10 min |
| May 28 | 87°F | 66°F | 32% | 19% | 14 h 10 min |
| May 29 | 87°F | 67°F | 32% | 19% | 14 h 10 min |
| May 30 | 87°F | 67°F | 32% | 19% | 14 h 10 min |
| May 31 | 88°F | 67°F | 32% | 19% | 14 h 10 min |
- Normal high
- 83°FMay average
- Normal low
- 62°FMay average
- Precipitation
- 4.77 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 13 h 30 min to 14 h 10 minMay 1 to May 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 23
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053914; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in McKinney in May?
On a given May day the chance of 0.01 inch or more is 33% on average, highest around May 10 (33%). In all, 4.77 in falls on 11 days of a normal May, 2 of them with an inch or more.
In a normal May in McKinney, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053914.
What are the records for May in McKinney?
The warmest May temperature on this station's record (since 1998) is 101°F, on May 30, 2003; the coldest is 35°F, on May 4, 2013. The wettest May brought 14.83 in (2015).
The May mean against the 1991-2020 normal of 72.6°F: 2021 69.7°F (−2.9), 2022 74.6°F (+2.0), 2023 72.9°F (+0.3), 2024 75.3°F (+2.7), 2025 72.3°F (−0.3), 2026 72.9°F (+0.3). 4 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.7°F | −2.9°F | 10.11 in |
| 2022 | 74.6°F | +2.0°F | 5.72 in |
| 2023 | 72.9°F | +0.3°F | 1.89 in |
| 2024 | 75.3°F | +2.7°F | 11.06 in |
| 2025 | 72.3°F | −0.3°F | 3.81 in |
| 2026 | 72.9°F | +0.3°F | 4.94 in |
Source: records: ACIS, station USW00053914; recent months: ACIS, station USW00053914. Records and recent months use complete months only.
How does May in McKinney compare across Texas?
Across the 321 places PlainClimate covers in Texas, May normal highs run from 78°F in Hartley to 98°F in Terlingua; McKinney's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.