Rock Hill weather in May: Rock Hill, South Carolina: normal highs, lows, rain and records for May
Rock Hill in May has a normal high of 80°F and a normal low of 57°F, a daily mean of 69°F, rising from 77°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 11 days in a normal May, 3.16 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 14°C, 80 mm of precipitation in May.
- NOAA stationRock Hill York County Airport
- Station IDUSW00053871
- Location34.99°N 81.06°W
- Elevation669 ft (204 m)
- From the center4 miles
- Population75,798
- Jan 52° 31°
- Feb 57° 34°
- Mar 64° 40°
- Apr 74° 48°
- May 80° 57°
- Jun 87° 66°
- Jul 90° 69°
- Aug 89° 68°
- Sep 83° 62°
- Oct 73° 49°
- Nov 63° 39°
- Dec 55° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rock Hill in May?
The normal high is 80°F and the normal low 57°F, for a daily mean of 68.6°F. May is 7.9°F warmer than April and 7.8°F cooler than June. May is the 5th warmest month of the year in Rock Hill and the 10th wettest. Across the month the normal high rises 7°F, from 77°F on May 1 to 84°F on May 31. From one year to the next May's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Mays in three average between 66°F and 71°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 77°F | 52°F | 32% | 19% |
| May 8 | 79°F | 54°F | 33% | 19% |
| May 15 | 80°F | 57°F | 34% | 19% |
| May 22 | 81°F | 59°F | 35% | 20% |
| May 31 | 84°F | 62°F | 35% | 20% |
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 | 77°F | 52°F | 32% | 19% | 13 h 30 min |
| May 2 | 78°F | 53°F | 32% | 19% | 13 h 40 min |
| May 3 | 78°F | 53°F | 32% | 19% | 13 h 40 min |
| May 4 | 78°F | 53°F | 32% | 19% | 13 h 40 min |
| May 5 | 78°F | 54°F | 33% | 19% | 13 h 40 min |
| May 6 | 78°F | 54°F | 33% | 19% | 13 h 40 min |
| May 7 | 79°F | 54°F | 33% | 19% | 13 h 40 min |
| May 8 | 79°F | 54°F | 33% | 19% | 13 h 50 min |
| May 9 | 79°F | 55°F | 33% | 19% | 13 h 50 min |
| May 10 | 79°F | 55°F | 33% | 19% | 13 h 50 min |
| May 11 | 79°F | 55°F | 33% | 19% | 13 h 50 min |
| May 12 | 79°F | 56°F | 33% | 19% | 13 h 50 min |
| May 13 | 80°F | 56°F | 33% | 19% | 14 h |
| May 14 | 80°F | 56°F | 34% | 19% | 14 h |
| May 15 | 80°F | 57°F | 34% | 19% | 14 h |
| May 16 | 80°F | 57°F | 34% | 19% | 14 h |
| May 17 | 80°F | 57°F | 34% | 20% | 14 h |
| May 18 | 81°F | 58°F | 34% | 20% | 14 h |
| May 19 | 81°F | 58°F | 34% | 20% | 14 h |
| May 20 | 81°F | 58°F | 35% | 20% | 14 h 10 min |
| May 21 | 81°F | 59°F | 35% | 20% | 14 h 10 min |
| May 22 | 81°F | 59°F | 35% | 20% | 14 h 10 min |
| May 23 | 82°F | 59°F | 35% | 20% | 14 h 10 min |
| May 24 | 82°F | 60°F | 35% | 20% | 14 h 10 min |
| May 25 | 82°F | 60°F | 35% | 20% | 14 h 10 min |
| May 26 | 82°F | 60°F | 35% | 20% | 14 h 10 min |
| May 27 | 83°F | 61°F | 35% | 20% | 14 h 10 min |
| May 28 | 83°F | 61°F | 35% | 20% | 14 h 20 min |
| May 29 | 83°F | 61°F | 35% | 20% | 14 h 20 min |
| May 30 | 83°F | 62°F | 35% | 20% | 14 h 20 min |
| May 31 | 84°F | 62°F | 35% | 20% | 14 h 20 min |
- Normal high
- 80°FMay average
- Normal low
- 57°FMay average
- Precipitation
- 3.16 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 30 min to 14 h 20 minMay 1 to May 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 20
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053871; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rock Hill in May?
On a given May day the chance of 0.01 inch or more is 34% on average, highest around May 31 (35%). In all, 3.16 in falls on 11 days of a normal May, 1 of them with an inch or more.
In a normal May in Rock Hill, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053871.
What are the records for May in Rock Hill?
The warmest May temperature on this station's record (since 1999) is 96°F, on May 30, 2019; the coldest is 36°F, on May 12, 2020. The wettest May brought 8.76 in (2003).
The May mean against the 1991-2020 normal of 68.6°F: 2021 67.7°F (−0.9), 2022 70.7°F (+2.1), 2023 65.7°F (−2.9), 2024 70.2°F (+1.6), 2025 67.8°F (−0.8). 2 of 5 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.7°F | −0.9°F | 1.26 in |
| 2022 | 70.7°F | +2.1°F | 3.31 in |
| 2023 | 65.7°F | −2.9°F | 2.08 in |
| 2024 | 70.2°F | +1.6°F | 4.38 in |
| 2025 | 67.8°F | −0.8°F | 7.47 in |
Source: records: ACIS, station USW00053871; recent months: ACIS, station USW00053871. Records and recent months use complete months only.
How does May in Rock Hill compare across South Carolina?
Across the 73 places PlainClimate covers in South Carolina, May normal highs run from 70°F in Caesars Head to 86°F in Hampton; Rock Hill's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.