McKinney, TX weather in May
McKinney is warm and often humid in May, with some rain: highs average 83°F and nights drop to about 62°F. There are about 9 days with rain.
- Normal high
- 83°F
- Normal low
- 62°F
- Wet days
- 9
- 5.3 in total
- Muggy days
- 13
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 78°F | 88°F |
| Normal low | 57°F | 67°F |
| Chance of a wet day | 28% | 29% |
| Sunrise / sunset | 6:38 am / 8:08 pm | 6:18 am / 8:29 pm |
| Daylight | 13.5 h | 14.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical May day
- 6 am67°Fdew point 61°F
- 9 am73°Fdew point 62°F
- Noon79°Fdew point 62°F
- 3 pm82°Fdew point 61°F
- 6 pm80°Fdew point 61°F
- 9 pm74°Fdew point 62°F
NOAA hourly normals (local standard time) from Dallas Ft Worth Airport (31 mi away); average wind 11 mph; clear or few clouds in 27% of daytime hours, mostly cloudy or overcast in 56%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F5 of 31
- Hot dayshigh 90°F or more5 of 31
- Muggy daysdaily mean dew point 65°F or more13 of 31
- Wet daysat least 0.01 in of rain or melted snow9 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 5.3 in; a dry May brings about 2.9 in and a wet one about 6.7 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 2 an inch or more.
How May varies from year to year
- Warmest May, 1991-20201998: average high 88°F
- Coolest May2016: average high 79°F
- Wettest May2015: 19.1 in
- Driest May2017: 1.0 in
- Highest reading101°F (May 30, 2003)
- Lowest reading35°F (May 4, 2013)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 75°F | 83°F | 91°F |
| Normal low | 53°F | 62°F | 70°F |
| Wet days | 7 | 9 | 8 |
| Comfortable days | 15 | 5 | 0 |
| Daylight | 13.0 h | 13.9 h | 14.3 h |
Highs change by +8°F from April and +8°F into June.
Nearby alternatives in May
- Cooler: Fayetteville, AR242 mi · high 77°F · 13 wet days
How McKinney ranks in May
- Normal high101st warmest of 378 cities; 37th of 38 in Texas
- Wet days173rd driest of 378
- Comfortable days252nd most of 339
What to pack for McKinney in May
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
May has 15 heating degree days and 251 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is McKinney in May?
The normal high is 83°F and the normal low is 62°F. From 1991 to 2020 the hottest May reading was 101°F (May 30, 2003).
Does it rain a lot in McKinney in May?
About 9 days in May have at least 0.01 in of precipitation, and the normal total is 5.3 in. The wettest May in 1991-2020 was in 2015 (19.1 in); the driest was in 2017 (1.0 in).
Is May a good time to visit McKinney?
May ranks 6th of 12 months on our comfort score for McKinney (55 out of 100). It has about 5 comfortable days and about 5 days at 90°F or hotter. The best months are March and April.
Where the numbers come from
- Temperature and frost dates: Mckinney Muni Airport (USW00053914), 1.9 mi SE of the city center, 580 ft (50 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Frisco (USC00413370), 10 mi W of the city center, 747 ft (117 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Dallas Ft Worth Airport (USW00003927), 31 mi SW of the city center, 560 ft (70 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Dallas/Ft Worth International Airport (722590-03927), 31 mi SW of the city center, 544 ft (86 ft lower than the city). Hourly observations, 1991-2020.