Plano, TX weather in May
Plano is warm and often humid in May, with some rain: highs average 85°F and nights drop to about 66°F. Expect about 10 wet days.
- Normal high
- 85°F
- Normal low
- 66°F
- Wet days
- 10
- 5.2 in total
- Muggy days
- 13
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 81°F | 90°F |
| Normal low | 61°F | 71°F |
| Chance of a wet day | 29% | 28% |
| Sunrise / sunset | 6:39 am / 8:08 pm | 6:19 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 (20 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°F4 of 31
- Hot dayshigh 90°F or more8 of 31
- Muggy daysdaily mean dew point 65°F or more13 of 31
- Wet daysat least 0.01 in of rain or melted snow10 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 5.2 in; a dry May brings about 3.0 in and a wet one about 6.9 in (25th and 75th percentiles). About 3 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 91°F
- Coolest May1992: average high 80°F
- Wettest May2015: 17.5 in
- Driest May2017: 0.7 in
- Highest reading102°F (May 31, 1998)
- Lowest reading40°F (May 3, 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 | 77°F | 85°F | 93°F |
| Normal low | 57°F | 66°F | 74°F |
| Wet days | 8 | 10 | 7 |
| Comfortable days | 14 | 4 | 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
- Drier: Conroe, TX201 mi · high 87°F · 6 wet days
- Cooler: Oklahoma City, OK175 mi · high 79°F · 10 wet days
How Plano ranks in May
- Normal high70th warmest of 378 cities; 24th of 38 in Texas
- Wet days184th driest of 378
- Comfortable days268th most of 339
What to pack for Plano in May
- Light, breathable clothing – highs near 85°F and about 13 muggy days
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
May has 6 heating degree days and 330 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How hot is Plano in May?
The normal high is 85°F and the normal low is 66°F. From 1991 to 2020 the hottest May reading was 102°F (May 31, 1998).
Does it rain a lot in Plano in May?
About 10 days in May have at least 0.01 in of precipitation, and the normal total is 5.2 in. The wettest May in 1991-2020 was in 2015 (17.5 in); the driest was in 2017 (0.7 in).
Is May a good time to visit Plano?
May ranks 8th of 12 months on our comfort score for Plano (52 out of 100). It has about 4 comfortable days and about 8 days at 90°F or hotter. The best months are March and April.
Where the numbers come from
- Temperature: Dallas Love Fld (USW00013960), 15 mi SW of the city center, 440 ft (228 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain and frost dates: Richardson (USC00417588), 3.0 mi WSW of the city center, 678 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Frisco (USC00413370), 13 mi NNW of the city center, 747 ft (79 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), 20 mi WSW of the city center, 560 ft (108 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Dallas/Ft Worth International Airport (722590-03927), 21 mi WSW of the city center, 544 ft (124 ft lower than the city). Hourly observations, 1991-2020.