Weather in Rock Hill, South Carolina
Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 17Overcast—90°64°
- MondayMay 18Mostly Clear—92°67°
- TuesdayMay 19Overcast—91°62°
- WednesdayMay 20Overcast13%92°66°
- ThursdayMay 21Drizzle76%90°66°
- FridayMay 22Light Drizzle76%80°65°
- SaturdayMay 23Overcast63%85°66°
- PM 2.5
- 21.4 μg/m³
- PM 10
- 22.6 μg/m³
- NO₂
- 8.1 μg/m³
- Ozone
- 72.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 10:30 AM
- Moonset
- 12:44 AM
- In sign
- ♊︎ Gemini
Roses open on the Piedmont edge
Rock Hill at a glance
- Today vs. normal: 10°F below the seasonal normal for this latitude
- Last frost: March 17 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Peak growing season
As of May 17, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
July brings Rock Hill's peak heat with average temperatures around 80°F, while January delivers the year's coldest conditions at roughly 43°F. Precipitation reaches its annual high in June at 4.1 inches, then drops to its lowest point in October with 2.9 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 43° | 3.6″ | 6 |
| February | 46° | 3.1″ | 6 |
| March | 54° | 3.9″ | 7 |
| April | 62° | 3.7″ | 6 |
| May | 70° | 3.5″ | 6 |
| June | 77° | 4.1″ | 6 |
| July | 80° | 3.6″ | 6 |
| August | 79° | 3.7″ | 6 |
| September | 73° | 3.6″ | 5 |
| October | 63° | 2.9″ | 5 |
| November | 52° | 3.3″ | 5 |
| December | 45° | 3.6″ | 6 |
Regional context
Rock Hill falls within the humid subtropical climate region, sharing temperature ranges, seasonal cycles, and growing conditions with other nearby cities in this zone.
Similar climates: Charleston, SC, Columbia, SC, Greenville, SC, Myrtle Beach, SC, Spartanburg, SC.
Naturalist notes
Late April often brings the return of Ruby-throated Hummingbirds to Rock Hill's gardens and woodland edges.
Dogwood trees typically reach peak bloom across the area during mid-April, their white bracts creating distinctive displays in forests and neighborhoods.
Frequently asked
- When does it freeze in Rock Hill?
- Spring's final frost usually occurs around mid-March in Rock Hill, while the season's first frost returns around mid-December.
- What is the rainy season in Rock Hill?
- June stands as the wettest month, delivering approximately 4.1 inches of rainfall, contributing to the city's annual total of roughly 43 inches.
- What is the warmest month in Rock Hill?
- July typically registers as the warmest month, with average temperatures around 80°F.
- What is the coldest month in Rock Hill?
- January brings the coldest temperatures, averaging approximately 43°F.
- When can I start a vegetable garden in Rock Hill?
- Cool-season vegetables like peas and lettuce can be planted around the last spring frost in mid-March, while warm-season crops such as tomatoes and peppers should wait 1–2 weeks after.
- How many rainy days does Rock Hill get?
- Rock Hill experiences approximately 70 rainy days each year.
- What hardiness zone is Rock Hill?
- Rock Hill's USDA hardiness zone depends on its lowest average winter temperatures; the USDA's online ZIP code lookup tool provides the current zone designation.
Climate
Rock Hill, South Carolina experiences a humid subtropical climate zone. Winter temperatures in January typically hover near 43°F, while July brings averages around 80°F — creating a 37°F seasonal swing.
Annual precipitation totals about 43 inches, distributed across roughly 70 rainy days throughout the year.
Weather patterns here follow the city's latitude at 34.9°N, along with proximity to large water bodies and local elevation. These factors determine growing conditions, frost timing, and daily weather characteristics.